\n \n
`);\n\n $form.appendTo($shareDiv);\n\n $form.find('.fieldset-embed input').on('change', event => {\n const form = $(event.target).parents('form:first');\n const params = {};\n params.mode = $(form.find('.fieldset-embed input[name=pages]:checked')).val();\n if (form.find('.fieldset-embed input[name=thispage]').prop('checked')) {\n params.page = br.getPageNum(br.currentIndex());\n }\n\n if (br.getEmbedCode) {\n // $$$ changeable width/height to be added to share UI\n const frameWidth = \"480px\";\n const frameHeight = \"430px\";\n form.find('.BRframeEmbed').val(br.getEmbedCode(frameWidth, frameHeight, params));\n }\n });\n\n $form.find('input, textarea').on('focus', event => event.target.select());\n\n // Bind share buttons\n\n // Use url without hashes\n $form.find('.facebook-share-button').click(() => {\n const params = $.param({ u: this._getSocialShareUrl() });\n const url = 'https://www.facebook.com/sharer.php?' + params;\n createPopup(url, 600, 400, 'Share');\n });\n $form.find('.twitter-share-button').click(() => {\n const params = $.param({\n url: this._getSocialShareUrl(),\n text: br.bookTitle\n });\n const url = 'https://twitter.com/intent/tweet?' + params;\n createPopup(url, 600, 400, 'Share');\n });\n $form.find('.email-share-button').click(() => {\n const body = `${br.bookTitle}\\n\\n${this._getSocialShareUrl()}`;\n window.location.href = `mailto:?subject=${encodeURI(br.bookTitle)}&body=${encodeURI(body)}`;\n });\n\n $form.find('input[name=thispage]').trigger('change');\n\n $form.appendTo($shareDiv);\n }\n\n _getSocialShareUrl() {\n const { br } = this;\n const shareThisPage = br.$('.thispage-social').prop('checked');\n if (shareThisPage) {\n return window.location.href;\n } else {\n return `${document.location.protocol}//${window.location.hostname}${window.location.pathname}`;\n }\n }\n\n /**\n * @param {JQuery} $infoDiv DOM element. Appends info to this element\n * Can be overridden or extended\n */\n buildInfoDiv($infoDiv) {\n const { br } = this;\n // Remove these legacy elements\n $infoDiv.find('.BRfloatBody, .BRfloatCover, .BRfloatFoot').remove();\n\n const $leftCol = $(``);\n if (br.thumbnail) {\n $leftCol.append($(`\n \n ![\"${escapeHTML(br.bookTitle)}\"](\"${br.thumbnail}\")
\n
`));\n }\n\n const $rightCol = $(``);\n\n // A loop to build fields\n for (const {extraValueClass = '', label, value} of br.metadata) {\n const escapedValue = label === 'Title' ? escapeHTML(value) : value;\n $rightCol.append($(`\n
\n
`));\n }\n\n const moreInfoText = br.bookUrlMoreInfo ? br.bookUrlMoreInfo : br.bookTitle;\n if (moreInfoText && br.bookUrl) {\n $rightCol.append($(`\n ${label}
\n ${escapedValue}
\n \n \n
`));\n }\n\n const $footer = $(``);\n const $children = $('').append([\n $leftCol,\n $rightCol,\n $('
'),\n ]);\n\n $infoDiv\n .append($children, $footer)\n .addClass('wide');\n }\n\n /**\n * @return {number} (in pixels) of the toolbar height. 0 if no toolbar.\n */\n getToolBarHeight() {\n const { $BRtoolbar } = this.br.refs;\n if ($BRtoolbar && $BRtoolbar.css('display') === 'block') {\n return ($BRtoolbar.outerHeight() + parseInt($BRtoolbar.css('top')));\n } else {\n return 0;\n }\n }\n}\n\nexport function blankInfoDiv() {\n return $(`\n `);\n}\n\nexport function blankShareDiv() {\n return $(`\n} e\n */\n const handler = function(element, e) {\n if (e.which == 3) {\n // right click\n return !e.data.self.br.protected;\n }\n e.data.self.br.trigger(EVENTS.stop);\n e.data.self.br[e.data.direction === 'L' ? 'left' : 'right']();\n\n // Removed event handler for mouse movement, seems not to be needed\n /*\n // Changes per WEBDEV-2737\n BookReader: zoomed-in 2 page view, clicking page should change the page\n $(element)\n .mousemove(function() {\n e.preventDefault();\n })\n */\n }\n\n this.setClickHandler(\n this.pageContainers[this.br.twoPage.currentIndexR].$container[0],\n { self: this, direction: 'R' },\n handler\n );\n this.setClickHandler(\n this.pageContainers[this.br.twoPage.currentIndexL].$container[0],\n { self: this, direction: 'L' },\n handler\n );\n }\n\n /**\n * Prepare to flip the left page towards the right. This corresponds to moving\n * backward when the page progression is left to right.\n * @param {number} prevL\n * @param {number} prevR\n */\n prepareFlipLeftToRight(prevL, prevR) {\n this.createPageContainer(prevL, true);\n this.createPageContainer(prevR, true);\n\n const $twoPageViewEl = this.br.refs.$brTwoPageView;\n const height = this.book._getPageHeight(prevL);\n const width = this.book._getPageWidth(prevL);\n const middle = this.br.twoPage.middle;\n const top = this.top();\n const scaledW = this.br.twoPage.height * width / height; // $$$ assumes height of page is dominant\n\n // The gutter is the dividing line between the left and right pages.\n // It is offset from the middle to create the illusion of thickness to the pages\n const gutter = middle + this.gutterOffsetForIndex(prevL);\n\n const leftCSS = {\n left: `${gutter - scaledW}px`,\n right: '', // clear right property\n top: `${top}px`,\n height: this.br.twoPage.height,\n width: `${scaledW}px`,\n zIndex: 1\n };\n\n this.pageContainers[prevL].$container\n .css(leftCSS)\n .appendTo($twoPageViewEl);\n\n const rightCSS = {\n left: `${gutter}px`,\n right: '',\n top: `${top}px`,\n height: this.br.twoPage.height,\n width: '0',\n zIndex: 2\n };\n\n this.pageContainers[prevR].$container\n .css(rightCSS)\n .appendTo($twoPageViewEl);\n }\n\n /**\n * // $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667\n */\n prepareFlipRightToLeft(nextL, nextR) {\n this.createPageContainer(nextL, true);\n this.createPageContainer(nextR, true);\n\n const $twoPageViewEl = this.br.refs.$brTwoPageView;\n let height = this.book._getPageHeight(nextR);\n let width = this.book._getPageWidth(nextR);\n const middle = this.br.twoPage.middle;\n const top = this.top();\n let scaledW = this.br.twoPage.height * width / height;\n\n const gutter = middle + this.gutterOffsetForIndex(nextL);\n\n $(this.pageContainers[nextR].$container).css({\n left: `${gutter}px`,\n top: `${top}px`,\n height: this.br.twoPage.height,\n width: `${scaledW}px`,\n zIndex: 1,\n })\n .appendTo($twoPageViewEl);\n\n height = this.book._getPageHeight(nextL);\n width = this.book._getPageWidth(nextL);\n scaledW = this.br.twoPage.height * width / height;\n\n $(this.pageContainers[nextL].$container).css({\n right: `${$twoPageViewEl.prop('clientWidth') - gutter}px`,\n top: `${top}px`,\n height: this.br.twoPage.height,\n width: '0px', // Start at 0 width, then grow to the left\n zIndex: 2,\n })\n .appendTo($twoPageViewEl);\n }\n\n getPageWidth(index) {\n // We return the width based on the dominant height\n const height = this.book._getPageHeight(index);\n const width = this.book._getPageWidth(index);\n // $$$ we assume width is relative to current spread\n return Math.floor(this.br.twoPage.height * width / height);\n }\n\n /**\n * Returns the position of the gutter (line between the page images)\n */\n gutter() {\n return this.br.twoPage.middle + this.gutterOffsetForIndex(this.br.twoPage.currentIndexL);\n }\n\n /**\n * Returns the offset for the top of the page images\n */\n top() {\n return this.br.twoPage.coverExternalPadding + this.br.twoPage.coverInternalPadding; // $$$ + border?\n }\n\n /**\n * Returns the width of the cover div given the total page width\n * @param {number} totalPageWidth\n * @return {number}\n */\n coverWidth(totalPageWidth) {\n return totalPageWidth + this.br.twoPage.edgeWidth + 2 * this.br.twoPage.coverInternalPadding;\n }\n\n /**\n * Returns the percentage offset into twopageview div at the center of container div\n */\n getViewCenter() {\n const { $brContainer, $brTwoPageView } = this.br.refs;\n const center = {};\n\n const containerOffset = $brContainer.offset();\n const viewOffset = $brTwoPageView.offset();\n center.percentageX = (containerOffset.left - viewOffset.left + ($brContainer.prop('clientWidth') >> 1)) / this.br.twoPage.totalWidth;\n center.percentageY = (containerOffset.top - viewOffset.top + ($brContainer.prop('clientHeight') >> 1)) / this.br.twoPage.totalHeight;\n\n return center;\n }\n\n /**\n * Centers the point given by percentage from left,top of twopageview\n * @param {number} [percentageX=0.5]\n * @param {number} [percentageY=0.5]\n */\n centerView(percentageX, percentageY) {\n\n if ('undefined' == typeof(percentageX)) {\n percentageX = 0.5;\n }\n if ('undefined' == typeof(percentageY)) {\n percentageY = 0.5;\n }\n\n const viewWidth = this.br.refs.$brTwoPageView.width();\n const containerClientWidth = this.br.refs.$brContainer.prop('clientWidth');\n const intoViewX = percentageX * viewWidth;\n\n const viewHeight = this.br.refs.$brTwoPageView.height();\n const containerClientHeight = this.br.refs.$brContainer.prop('clientHeight');\n const intoViewY = percentageY * viewHeight;\n\n if (viewWidth < containerClientWidth) {\n // Can fit width without scrollbars - center by adjusting offset\n this.br.refs.$brTwoPageView.css('left', `${(containerClientWidth >> 1) - intoViewX}px`);\n } else {\n // Need to scroll to center\n this.br.refs.$brTwoPageView.css('left', 0);\n this.br.refs.$brContainer.scrollLeft(intoViewX - (containerClientWidth >> 1));\n }\n\n if (viewHeight < containerClientHeight) {\n // Fits with scrollbars - add offset\n this.br.refs.$brTwoPageView.css('top', `${(containerClientHeight >> 1) - intoViewY}px`);\n } else {\n this.br.refs.$brTwoPageView.css('top', 0);\n this.br.refs.$brContainer.scrollTop(intoViewY - (containerClientHeight >> 1));\n }\n }\n\n /**\n * Returns the integer height of the click-to-flip areas at the edges of the book\n * @return {number}\n */\n flipAreaHeight() {\n return Math.floor(this.br.twoPage.height);\n }\n\n /**\n * Returns the the integer width of the flip areas\n * @return {number}\n */\n flipAreaWidth() {\n const max = 100; // $$$ TODO base on view width?\n const min = 10;\n\n const width = this.br.twoPage.width * 0.15;\n return Math.floor(clamp(width, min, max));\n }\n\n /**\n * Returns integer top offset for flip areas\n * @return {number}\n */\n flipAreaTop() {\n return Math.floor(this.br.twoPage.bookCoverDivTop + this.br.twoPage.coverInternalPadding);\n }\n\n /**\n * Left offset for left flip area\n * @return {number}\n */\n leftFlipAreaLeft() {\n return Math.floor(this.br.twoPage.gutter - this.br.twoPage.scaledWL);\n }\n\n /**\n * Left offset for right flip area\n * @return {number}\n */\n rightFlipAreaLeft() {\n return Math.floor(this.br.twoPage.gutter + this.br.twoPage.scaledWR - this.flipAreaWidth());\n }\n\n /**\n * Position calculation shared between search and text-to-speech functions\n */\n setHilightCss(div, index, left, right, top, bottom) {\n // We calculate the reduction factor for the specific page because it can be different\n // for each page in the spread\n const height = this.book._getPageHeight(index);\n const width = this.book._getPageWidth(index);\n const reduce = this.br.twoPage.height / height;\n const scaledW = Math.floor(width * reduce);\n\n const gutter = this.gutter();\n let pageL;\n if ('L' == this.book.getPageSide(index)) {\n pageL = gutter - scaledW;\n } else {\n pageL = gutter;\n }\n const pageT = this.top();\n\n $(div).css({\n width: `${(right - left) * reduce}px`,\n height: `${(bottom - top) * reduce}px`,\n left: `${pageL + left * reduce}px`,\n top: `${pageT + top * reduce}px`\n });\n }\n\n /**\n * Returns the gutter offset for the spread containing the given index.\n * This function supports RTL\n * @param {number} pindex\n * @return {number}\n */\n gutterOffsetForIndex(pindex) {\n // To find the offset of the gutter from the middle we calculate our percentage distance\n // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width\n let offset = Math.floor(((pindex / this.book.getNumLeafs()) - 0.5) * this.br.twoPage.edgeWidth);\n\n // But then again for RTL it's the opposite\n if ('rl' == this.br.pageProgression) {\n offset *= -1;\n }\n\n return offset;\n }\n\n /**\n * Returns the width of the leaf edge div for the page with index given\n * @param {number} pindex\n * @return {number}\n */\n leafEdgeWidth(pindex) {\n // $$$ could there be single pixel rounding errors for L vs R?\n if ((this.book.getPageSide(pindex) == 'L') && (this.br.pageProgression != 'rl')) {\n return Math.floor( (pindex / this.book.getNumLeafs()) * this.br.twoPage.edgeWidth + 0.5);\n } else {\n return Math.floor( (1 - pindex / this.book.getNumLeafs()) * this.br.twoPage.edgeWidth + 0.5);\n }\n }\n\n /**\n * Returns the target jump leaf given a page coordinate (inside the left page edge div)\n * @param {number} pageX\n * @return {PageIndex}\n */\n jumpIndexForLeftEdgePageX(pageX) {\n let jumpIndex;\n if ('rl' != this.br.pageProgression) {\n // LTR - flipping backward\n jumpIndex = this.br.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;\n\n // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570\n jumpIndex = clamp(Math.round(jumpIndex), this.br.firstDisplayableIndex(), this.br.twoPage.currentIndexL - 2);\n return jumpIndex;\n\n } else {\n jumpIndex = this.br.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;\n jumpIndex = clamp(Math.round(jumpIndex), this.br.twoPage.currentIndexL + 2, this.br.lastDisplayableIndex());\n return jumpIndex;\n }\n }\n\n /**\n * Returns the target jump leaf given a page coordinate (inside the right page edge div)\n * @param {number} pageX\n * @return {PageIndex}\n */\n jumpIndexForRightEdgePageX(pageX) {\n let jumpIndex;\n if ('rl' != this.br.pageProgression) {\n // LTR\n jumpIndex = this.br.twoPage.currentIndexL + (pageX - $(this.leafEdgeR).offset().left) * 10;\n jumpIndex = clamp(Math.round(jumpIndex), this.br.twoPage.currentIndexL + 2, this.br.lastDisplayableIndex());\n return jumpIndex;\n } else {\n jumpIndex = this.br.twoPage.currentIndexL - (pageX - $(this.leafEdgeR).offset().left) * 10;\n jumpIndex = clamp(Math.round(jumpIndex), this.br.firstDisplayableIndex(), this.br.twoPage.currentIndexL - 2);\n return jumpIndex;\n }\n }\n\n /**\n * Fetches the currently displayed images (if not already fetching)\n * as wells as any nearby pages.\n */\n prefetch() {\n // $$$ We should check here if the current indices have finished\n // loading (with some timeout) before loading more page images\n // See https://bugs.edge.launchpad.net/bookreader/+bug/511391\n const { max, min } = Math;\n const { book } = this;\n const { currentIndexL, currentIndexR } = this.br.twoPage;\n const ADJACENT_PAGES_TO_LOAD = 2;\n // currentIndexL can be -1; getPage returns the last page of the book\n // when given -1, so need to prevent that.\n let lowPage = book.getPage(max(0, min(currentIndexL, currentIndexR)));\n let highPage = book.getPage(max(currentIndexL, currentIndexR));\n\n for (let i = 0; i < ADJACENT_PAGES_TO_LOAD + 2; i++) {\n if (lowPage) {\n this.createPageContainer(lowPage.index);\n lowPage = lowPage.findPrev({ combineConsecutiveUnviewables: true });\n }\n\n if (highPage) {\n this.createPageContainer(highPage.index);\n highPage = highPage.findNext({ combineConsecutiveUnviewables: true });\n }\n }\n }\n\n /* 2up Container Sizes */\n\n /** main positions for inner containers */\n get baseLeafCss() {\n return {\n position: 'absolute',\n right: '',\n top: `${this.top()}px`,\n zIndex: 2,\n };\n }\n\n /** main height for inner containers */\n get heightCss() {\n return {\n height: `${this.br.twoPage.height}px`, // $$$ height forced the same for both pages\n };\n }\n\n /** Left Page sizing */\n get leftLeafCss() {\n return {\n ...this.baseLeafCss,\n ...this.heightCss,\n left: `${this.br.twoPage.gutter - this.br.twoPage.scaledWL}px`,\n width: `${this.br.twoPage.scaledWL}px`,\n }\n }\n\n /** Left side book thickness */\n get leafEdgeLCss() {\n return {\n ...this.heightCss,\n width: `${this.br.twoPage.leafEdgeWidthL}px`,\n left: `${this.br.twoPage.bookCoverDivLeft + this.br.twoPage.coverInternalPadding}px`,\n top: `${this.br.twoPage.bookCoverDivTop + this.br.twoPage.coverInternalPadding}px`,\n border: this.br.twoPage.leafEdgeWidthL === 0 ? 'none' : null\n };\n }\n\n /** Right Page sizing */\n get rightLeafCss() {\n return {\n ...this.baseLeafCss,\n ...this.heightCss,\n left: `${this.br.twoPage.gutter}px`,\n width: `${this.br.twoPage.scaledWR}px`,\n }\n }\n\n /** Right side book thickness */\n get leafEdgeRCss() {\n return {\n ...this.heightCss,\n width: `${this.br.twoPage.leafEdgeWidthR}px`,\n left: `${this.br.twoPage.scaledWL + this.br.twoPage.scaledWR + this.br.twoPage.leafEdgeWidthL}px`,\n top: `${this.br.twoPage.bookCoverDivTop + this.br.twoPage.coverInternalPadding}px`,\n border: this.br.twoPage.leafEdgeWidthR === 0 ? 'none' : null\n };\n }\n\n /** main container sizing */\n get mainContainerCss() {\n return {\n height: `${this.br.twoPage.totalHeight}px`,\n width: `${this.br.twoPage.totalWidth}px`,\n position: 'absolute'\n };\n }\n\n /** book cover sizing */\n get spreadCoverCss() {\n return {\n width: `${this.br.twoPage.bookCoverDivWidth}px`,\n height: `${this.br.twoPage.bookCoverDivHeight}px`,\n visibility: 'visible'\n };\n }\n\n /** book spine sizing */\n get spineCss() {\n return {\n width: `${this.br.twoPage.bookSpineDivWidth}px`,\n height: `${this.br.twoPage.bookSpineDivHeight}px`,\n left: `${this.br.twoPage.gutter - (this.br.twoPage.bookSpineDivWidth / 2)}px`,\n top: `${this.br.twoPage.bookSpineDivTop}px`\n };\n }\n /** end CSS */\n}\n\n/**\n * @implements {BookReaderOptions[\"twoPage\"]}\n * @typedef {object} TwoPageState\n * @property {number} coverInternalPadding\n * @property {number} coverExternalPadding\n *\n * @property {import('./options.js').AutoFitValues} autofit\n * @property {number} width\n * @property {number} height\n * @property {number} currentIndexL\n * @property {number} currentIndexR\n * @property {number} scaledWL\n * @property {number} scaledWR\n * @property {number} gutter\n * @property {Array<{reduce: number, autofit: import('./options.js').AutoFitValues}>} reductionFactors\n * @property {number} totalHeight\n * @property {number} totalWidth\n *\n * @property {HTMLDivElement} coverDiv\n * @property {number} bookCoverDivTop\n * @property {number} bookCoverDivLeft\n * @property {number} bookCoverDivWidth\n * @property {number} bookCoverDivHeight\n *\n * @property {number} leafEdgeWidthL\n * @property {number} leafEdgeWidthR\n *\n * @property {number} bookSpineDivTop\n * @property {number} bookSpineDivLeft\n * @property {number} bookSpineDivWidth\n * @property {number} bookSpineDivHeight\n *\n * @property {number} edgeWidth\n * @property {number} middle\n */\n","// @ts-check\nimport { notInArray, clamp } from './utils.js';\nimport { EVENTS } from './events.js';\n/** @typedef {import('../BookREader.js').default} BookReader */\n/** @typedef {import('./BookModel.js').PageIndex} PageIndex */\n/** @typedef {import('./BookModel.js').BookModel} BookModel */\n\n/** @typedef {JQuery} $lazyLoadImgPlaceholder * jQuery element with data attributes: leaf, reduce */\n\nexport class ModeThumb {\n /**\n * @param {BookReader} br\n * @param {BookModel} bookModel\n */\n constructor(br, bookModel) {\n this.br = br;\n this.book = bookModel;\n }\n\n /**\n * Draws the thumbnail view\n * @param {number} [seekIndex] If seekIndex is defined, the view will be drawn\n * with that page visible (without any animated scrolling).\n *\n * Creates place holder for image to load after gallery has been drawn\n */\n drawLeafs(seekIndex) {\n const { floor } = Math;\n const { book } = this;\n const viewWidth = this.br.refs.$brContainer.prop('scrollWidth') - 20; // width minus buffer\n\n let leafHeight;\n let rightPos = 0;\n let bottomPos = 0;\n let maxRight = 0;\n let currentRow = 0;\n let leafIndex = 0;\n /** @type {Array<{ leafs?: Array<{num: PageIndex, left: number}>, height?: number, top?: number }>} */\n const leafMap = [];\n\n // Will be set to top of requested seek index, if set\n let seekTop;\n\n // Calculate the position of every thumbnail. $$$ cache instead of calculating on every draw\n // make `leafMap`\n for (const page of book.pagesIterator({ combineConsecutiveUnviewables: true })) {\n const leafWidth = this.br.thumbWidth;\n if (rightPos + (leafWidth + this.br.thumbPadding) > viewWidth) {\n currentRow++;\n rightPos = 0;\n leafIndex = 0;\n }\n\n // Init current row in leafMap\n if (!leafMap[currentRow]) {\n leafMap[currentRow] = {};\n }\n if (!leafMap[currentRow].leafs) {\n leafMap[currentRow].leafs = [];\n leafMap[currentRow].height = 0;\n leafMap[currentRow].top = 0;\n }\n leafMap[currentRow].leafs[leafIndex] = {\n num: page.index,\n left: rightPos,\n };\n\n leafHeight = floor((page.height * this.br.thumbWidth) / page.width);\n if (leafHeight > leafMap[currentRow].height) {\n leafMap[currentRow].height = leafHeight;\n }\n if (leafIndex === 0) { bottomPos += this.br.thumbPadding + leafMap[currentRow].height; }\n rightPos += leafWidth + this.br.thumbPadding;\n if (rightPos > maxRight) { maxRight = rightPos; }\n leafIndex++;\n\n if (page.index == seekIndex) {\n seekTop = bottomPos - this.br.thumbPadding - leafMap[currentRow].height;\n }\n }\n\n // reset the bottom position based on thumbnails\n this.br.refs.$brPageViewEl.height(bottomPos);\n\n const pageViewBuffer = floor((this.br.refs.$brContainer.prop('scrollWidth') - maxRight) / 2) - 14;\n\n // If seekTop is defined, seeking was requested and target found\n if (typeof(seekTop) != 'undefined') {\n this.br.refs.$brContainer.scrollTop(seekTop);\n }\n\n const scrollTop = this.br.refs.$brContainer.prop('scrollTop');\n const scrollBottom = scrollTop + this.br.refs.$brContainer.height();\n\n let leafTop = 0;\n let leafBottom = 0;\n const rowsToDisplay = [];\n const imagesToDisplay = [];\n\n // Visible leafs with least/greatest index\n let leastVisible = book.getNumLeafs() - 1;\n let mostVisible = 0;\n\n // Determine the thumbnails in view\n for (let i = 0; i < leafMap.length; i++) {\n if (!leafMap[i]) { continue; }\n leafBottom += this.br.thumbPadding + leafMap[i].height;\n const topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);\n const bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);\n const middleInView = (leafTop <= scrollTop) && (leafBottom >= scrollBottom);\n if (topInView || bottomInView || middleInView) {\n rowsToDisplay.push(i);\n if (leafMap[i].leafs[0].num < leastVisible) {\n leastVisible = leafMap[i].leafs[0].num;\n }\n if (leafMap[i].leafs[leafMap[i].leafs.length - 1].num > mostVisible) {\n mostVisible = leafMap[i].leafs[leafMap[i].leafs.length - 1].num;\n }\n }\n if (leafTop > leafMap[i].top) { leafMap[i].top = leafTop; }\n leafTop = leafBottom;\n }\n // at this point, `rowsToDisplay` now has all the rows in view\n\n // create a buffer of preloaded rows before and after the visible rows\n const firstRow = rowsToDisplay[0];\n const lastRow = rowsToDisplay[rowsToDisplay.length - 1];\n for (let i = 1; i < this.br.thumbRowBuffer + 1; i++) {\n if (lastRow + i < leafMap.length) { rowsToDisplay.push(lastRow + i); }\n }\n for (let i = 1; i < this.br.thumbRowBuffer; i++) {\n if (firstRow - i >= 0) { rowsToDisplay.push(firstRow - i); }\n }\n rowsToDisplay.sort();\n\n // Create the thumbnail divs and images (lazy loaded)\n for (const row of rowsToDisplay) {\n if (notInArray(row, this.br.displayedRows)) {\n if (!leafMap[row]) { continue; }\n for (const { num: leaf, left: leafLeft } of leafMap[row].leafs) {\n const leafWidth = this.br.thumbWidth;\n const leafHeight = floor((book.getPageHeight(leaf) * this.br.thumbWidth) / book.getPageWidth(leaf));\n const leafTop = leafMap[row].top;\n let left = leafLeft + pageViewBuffer;\n if ('rl' == this.br.pageProgression) {\n left = viewWidth - leafWidth - left;\n }\n\n left += this.br.thumbPadding;\n imagesToDisplay.push(leaf);\n\n /* get thumbnail's reducer */\n const idealReduce = floor(book.getPageWidth(leaf) / this.br.thumbWidth);\n const nearestFactor2 = 2 * Math.round(idealReduce / 2);\n const thumbReduce = nearestFactor2;\n\n const pageContainer = this.br._createPageContainer(leaf)\n .update({\n dimensions: {\n width: leafWidth,\n height: leafHeight,\n top: leafTop,\n left,\n },\n reduce: thumbReduce,\n });\n\n pageContainer.$container.data('leaf', leaf).on('mouseup', event => {\n // We want to suppress the fragmentChange triggers in `updateFirstIndex` and `switchMode`\n // because otherwise it repeatedly triggers listeners and we get in an infinite loop.\n // We manually trigger the `fragmentChange` once at the end.\n this.br.updateFirstIndex(leaf, { suppressFragmentChange: true });\n // as per request in webdev-4042, we want to switch 1-up mode while clicking on thumbnail leafs\n this.br.switchMode(this.br.constMode1up, { suppressFragmentChange: true });\n\n // shift viewModeOrder after clicking on thumbsnail leaf\n const nextModeID = this.br.viewModeOrder.shift();\n this.br.viewModeOrder.push(nextModeID);\n this.br.updateViewModeButton($('.viewmode'), 'twopg', 'Two-page view');\n\n this.br.trigger(EVENTS.fragmentChange);\n event.stopPropagation();\n });\n\n this.br.refs.$brPageViewEl.append(pageContainer.$container);\n }\n }\n }\n\n // Remove thumbnails that are not to be displayed\n for (const row of this.br.displayedRows) {\n if (notInArray(row, rowsToDisplay)) {\n for (const { num: index } of leafMap[row]?.leafs) {\n if (!imagesToDisplay?.includes(index)) {\n this.br.$(`.pagediv${index}`)?.remove();\n }\n }\n }\n }\n\n // Update which page is considered current to make sure a visible page is the current one\n const currentIndex = this.br.currentIndex();\n if (currentIndex < leastVisible) {\n this.br.updateFirstIndex(leastVisible);\n } else if (currentIndex > mostVisible) {\n this.br.updateFirstIndex(mostVisible);\n }\n\n // remember what rows are displayed\n this.br.displayedRows = rowsToDisplay.slice();\n\n // remove previous highlights\n this.br.$('.BRpagedivthumb_highlight').removeClass('BRpagedivthumb_highlight');\n\n // highlight current page\n this.br.$('.pagediv' + this.br.currentIndex()).addClass('BRpagedivthumb_highlight');\n\n this.br.updateToolbarZoom(this.br.reduce);\n }\n\n /**\n * Replaces placeholder image with real one\n *\n * @param {$lazyLoadImgPlaceholder} imgPlaceholder\n */\n lazyLoadImage(imgPlaceholder) {\n const leaf = $(imgPlaceholder).data('leaf');\n const reduce = $(imgPlaceholder).data('reduce');\n const $img = this.br.imageCache.image(leaf, reduce);\n const $parent = $(imgPlaceholder).parent();\n /* March 16, 2021 (isa) - manually append & remove, `replaceWith` currently loses closure scope */\n $($parent).append($img);\n $(imgPlaceholder).remove();\n }\n\n /**\n * @param {1 | -1} direction\n */\n zoom(direction) {\n const oldColumns = this.br.thumbColumns;\n switch (direction) {\n case -1:\n this.br.thumbColumns += 1;\n break;\n case 1:\n this.br.thumbColumns -= 1;\n break;\n }\n\n this.br.thumbColumns = clamp(this.br.thumbColumns, 2, 8);\n\n if (this.br.thumbColumns != oldColumns) {\n this.br.displayedRows = []; /* force a gallery redraw */\n this.prepare();\n }\n }\n\n /**\n * Returns the width per thumbnail to display the requested number of columns\n * Note: #BRpageview must already exist since its width is used to calculate the\n * thumbnail width\n * @param {number} thumbnailColumns\n */\n getThumbnailWidth(thumbnailColumns) {\n const DEFAULT_THUMBNAIL_WIDTH = 100;\n\n const padding = (thumbnailColumns + 1) * this.br.thumbPadding;\n const width = (this.br.refs.$brPageViewEl.width() - padding) / (thumbnailColumns + 0.5); // extra 0.5 is for some space at sides\n const idealThumbnailWidth = Math.floor(width);\n return idealThumbnailWidth > 0 ? idealThumbnailWidth : DEFAULT_THUMBNAIL_WIDTH;\n }\n\n prepare() {\n this.br.refs.$brContainer.empty();\n this.br.refs.$brContainer.css({\n overflowY: 'scroll',\n overflowX: 'auto'\n });\n\n this.br.refs.$brPageViewEl = $(\"\");\n this.br.refs.$brContainer.append(this.br.refs.$brPageViewEl);\n this.br.refs.$brContainer.dragscrollable({preventDefault:true});\n\n this.br.bindGestures(this.br.refs.$brContainer);\n\n // $$$ keep select enabled for now since disabling it breaks keyboard\n // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)\n // disableSelect(this.br.$('#BRpageview'));\n this.br.thumbWidth = this.getThumbnailWidth(this.br.thumbColumns);\n this.br.reduce = this.book.getPageWidth(0) / this.br.thumbWidth;\n this.br.displayedRows = [];\n // Draw leafs with current index directly in view (no animating to the index)\n this.drawLeafs(this.br.currentIndex());\n this.br.updateBrClasses();\n }\n\n /**\n * @param {PageIndex} index\n */\n jumpToIndex(index) {\n const { floor } = Math;\n const { book } = this;\n const viewWidth = this.br.refs.$brContainer.prop('scrollWidth') - 20; // width minus buffer\n const leafWidth = this.br.thumbWidth;\n let leafTop = 0;\n let rightPos = 0;\n let bottomPos = 0;\n let rowHeight = 0;\n let leafIndex = 0;\n\n for (let i = 0; i <= index; i++) {\n if (rightPos + (leafWidth + this.br.thumbPadding) > viewWidth) {\n rightPos = 0;\n rowHeight = 0;\n leafIndex = 0;\n }\n\n const leafHeight = floor((book.getPageHeight(leafIndex) * this.br.thumbWidth) / book.getPageWidth(leafIndex));\n if (leafHeight > rowHeight) { rowHeight = leafHeight; }\n if (leafIndex == 0) {\n leafTop = bottomPos;\n bottomPos += this.br.thumbPadding + rowHeight;\n }\n rightPos += leafWidth + this.br.thumbPadding;\n leafIndex++;\n }\n this.br.updateFirstIndex(index);\n if (this.br.refs.$brContainer.prop('scrollTop') == leafTop) {\n this.br.drawLeafs();\n } else {\n this.br.animating = true;\n this.br.refs.$brContainer.stop(true)\n .animate({ scrollTop: leafTop }, 'fast', () => { this.br.animating = false });\n }\n }\n}\n","/**\n * @typedef {object} ReduceSet Set of valid numbers for a reduce variable.\n * @property {(n: number) => number} floor\n * @property {(n: number) => number} decr Return the predecessor of the given element\n */\n\n/** @type {ReduceSet} */\nexport const IntegerReduceSet = {\n floor: Math.floor,\n decr(n) { return n - 1; }\n};\n\n/** @type {ReduceSet} */\nexport const Pow2ReduceSet = {\n floor(n) {\n return 2 ** (Math.floor(Math.log2(Math.max(1, n))));\n },\n decr(n) {\n return 2 ** (Math.log2(n) - 1);\n }\n}\n\nexport const NAMED_REDUCE_SETS = {\n pow2: Pow2ReduceSet,\n integer: IntegerReduceSet,\n};\n","// @ts-check\n/**\n * Creates an image cache dictionary\n * storing images in `![]()
` tags so that\n * BookReader can leverage browser caching\n */\n/** @typedef {import(\"./BookModel\").BookModel} BookModel */\n/** @typedef {import(\"./BookModel\").PageIndex} PageIndex */\n/** @typedef {import(\"./ReduceSet\").ReduceSet} ReduceSet */\n\nimport { Pow2ReduceSet } from \"./ReduceSet\";\n\nexport class ImageCache {\n /**\n * @param {BookModel} book\n * @param {object} opts\n * @param {boolean} [opts.useSrcSet]\n * @param {ReduceSet} [opts.reduceSet]\n */\n constructor(book, { useSrcSet = false, reduceSet = Pow2ReduceSet } = {}) {\n this.book = book;\n this.useSrcSet = useSrcSet;\n this.reduceSet = reduceSet;\n /** @type {{ [index: number]: { reduce: number, loaded: boolean }[] }} */\n this.cache = {};\n this.defaultScale = 8;\n }\n\n /**\n * Get an image\n * Checks cache first if image is available & of equal/better scale,\n * if not, a new image gets created\n *\n * @param {PageIndex} index\n * @param {Number} reduce\n */\n image(index, reduce) {\n const cachedImages = this.cache[index] || [];\n const sufficientImages = cachedImages\n .filter(x => x.loaded && x.reduce <= reduce);\n if (sufficientImages.length) {\n // Choose the largest reduction factor that meets our needs\n const bestReduce = Math.max(...sufficientImages.map(e => e.reduce));\n return this._serveImageElement(index, bestReduce);\n } else {\n // Don't use a cache entry; i.e. a fresh fetch will be made\n // for this reduce\n return this._serveImageElement(index, reduce);\n }\n }\n\n /**\n * Checks if an image of equal or greater quality has been loaded\n * @param {PageIndex} index\n * @param {Number} reduce\n * @returns {Boolean}\n */\n imageLoaded(index, reduce) {\n const cacheImg = this.cache[index]?.find(e => e.reduce <= reduce);\n return cacheImg?.loaded ?? false;\n }\n\n /**\n * Get the best image that's already loaded for the given index,\n * trying to choose values less that the given reduce\n * @param {PageIndex} index\n * @param idealMaxReduce\n * @returns {null | number}\n */\n getBestLoadedReduce(index, idealMaxReduce = Infinity) {\n const candidates = this.cache[index]?.filter(x => x.loaded) || [];\n if (!candidates.length) return null;\n\n const lowerResImages = candidates.filter(e => e.reduce >= idealMaxReduce);\n if (lowerResImages.length) {\n // Choose the highest quality loaded lower res image\n return Math.min(...lowerResImages.map(e => e.reduce));\n }\n // Otherwise choose whatever is closest to the reduce\n const higherRestImages = candidates.filter(e => e.reduce < idealMaxReduce);\n return Math.max(...higherRestImages.map(e => e.reduce));\n }\n\n /**\n * @private\n * Generates an image element on the fly from image info in cache\n *\n * @param {PageIndex} index\n * @param {number} reduce\n * @returns {JQuery} with base image classes\n */\n _serveImageElement(index, reduce) {\n const validReduce = this.reduceSet.floor(reduce);\n let cacheEntry = this.cache[index]?.find(e => e.reduce == validReduce);\n if (!cacheEntry) {\n cacheEntry = { reduce: validReduce, loaded: false };\n const entries = this.cache[index] || (this.cache[index] = []);\n entries.push(cacheEntry);\n }\n const page = this.book.getPage(index);\n\n const $img = $('![]()
', {\n 'class': 'BRpageimage',\n 'alt': 'Book page image',\n src: page.getURI(validReduce, 0),\n })\n .data('reduce', validReduce);\n if (this.useSrcSet) {\n $img.attr('srcset', page.getURISrcSet(validReduce));\n }\n if (!cacheEntry.loaded) {\n $img.one('load', () => cacheEntry.loaded = true);\n }\n return $img;\n }\n}\n","// @ts-check\n/** @typedef {import('./BookModel.js').PageModel} PageModel */\n/** @typedef {import('./ImageCache.js').ImageCache} ImageCache */\n\n\nexport class PageContainer {\n /**\n * @param {PageModel} page\n * @param {object} opts\n * @param {boolean} opts.isProtected Whether we're in a protected book\n * @param {ImageCache} opts.imageCache\n * @param {string} opts.loadingImage\n */\n constructor(page, {isProtected, imageCache, loadingImage}) {\n this.page = page;\n this.imageCache = imageCache;\n this.loadingImage = loadingImage;\n this.$container = $('', {\n 'class': `BRpagecontainer ${page ? `pagediv${page.index}` : 'BRemptypage'}`,\n css: { position: 'absolute' },\n }).attr('data-side', page?.pageSide);\n\n if (isProtected) {\n this.$container.append($(''));\n this.$container.addClass('protected');\n }\n\n /** @type {JQuery} The main book page image */\n this.$img = null;\n }\n\n /**\n * @param {object} param0\n * @param {{ width: number, height: number, top: number, left: number }} [param0.dimensions]\n * @param {number} param0.reduce\n */\n update({dimensions = null, reduce = null}) {\n if (dimensions) {\n this.$container.css(dimensions);\n }\n\n if (reduce == null || !this.page) {\n return;\n }\n\n const alreadyLoaded = this.imageCache.imageLoaded(this.page.index, reduce);\n const nextBestLoadedReduce = !alreadyLoaded && this.imageCache.getBestLoadedReduce(this.page.index, reduce);\n\n // Add the actual, highres image\n this.$img?.remove();\n this.$img = this.imageCache\n .image(this.page.index, reduce)\n .prependTo(this.$container);\n\n const backgroundLayers = [];\n if (!alreadyLoaded) {\n this.$container.addClass('BRpageloading');\n backgroundLayers.push(`url(\"${this.loadingImage}\") center/20px no-repeat`);\n }\n if (nextBestLoadedReduce) {\n backgroundLayers.push(`url(\"${this.page.getURI(nextBestLoadedReduce, 0)}\") center/100% no-repeat`);\n }\n\n if (!alreadyLoaded) {\n this.$img\n .css('background', backgroundLayers.join(','))\n .one('loadend', async (ev) => {\n $(ev.target).css({ 'background': '' })\n $(ev.target).parent().removeClass('BRpageloading');\n });\n }\n\n return this;\n }\n}\n","/*\nCopyright(c)2008-2019 Internet Archive. Software license AGPL version 3.\n\nThis file is part of BookReader.\n\n BookReader is free software: you can redistribute it and/or modify\n it under the terms of the GNU Affero General Public License as published by\n the Free Software Foundation, either version 3 of the License, or\n (at your option) any later version.\n\n BookReader is distributed in the hope that it will be useful,\n but WITHOUT ANY WARRANTY; without even the implied warranty of\n MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n GNU Affero General Public License for more details.\n\n You should have received a copy of the GNU Affero General Public License\n along with BookReader. If not, see state to , but guard against overflow.\n var handledCPCountPlusOne = handledCPCount + 1;\n if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n throw RangeError(OVERFLOW_ERROR);\n }\n\n delta += (m - n) * handledCPCountPlusOne;\n n = m;\n\n for (i = 0; i < input.length; i++) {\n currentValue = input[i];\n if (currentValue < n && ++delta > maxInt) {\n throw RangeError(OVERFLOW_ERROR);\n }\n if (currentValue == n) {\n // Represent delta as a generalized variable-length integer.\n var q = delta;\n for (var k = base; /* no condition */; k += base) {\n var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n if (q < t) break;\n var qMinusT = q - t;\n var baseMinusT = base - t;\n output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));\n q = floor(qMinusT / baseMinusT);\n }\n\n output.push(stringFromCharCode(digitToBasic(q)));\n bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n delta = 0;\n ++handledCPCount;\n }\n }\n\n ++delta;\n ++n;\n }\n return output.join('');\n};\n\nmodule.exports = function (input) {\n var encoded = [];\n var labels = input.toLowerCase().replace(regexSeparators, '\\u002E').split('.');\n var i, label;\n for (i = 0; i < labels.length; i++) {\n label = labels[i];\n encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);\n }\n return encoded.join('.');\n};\n","'use strict';\nvar toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `String.prototype.repeat` method implementation\n// https://tc39.es/ecma262/#sec-string.prototype.repeat\nmodule.exports = function repeat(count) {\n var str = String(requireObjectCoercible(this));\n var result = '';\n var n = toInteger(count);\n if (n < 0 || n == Infinity) throw RangeError('Wrong number of repetitions');\n for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;\n return result;\n};\n","var global = require('../internals/global');\nvar fails = require('../internals/fails');\nvar bind = require('../internals/function-bind-context');\nvar html = require('../internals/html');\nvar createElement = require('../internals/document-create-element');\nvar IS_IOS = require('../internals/engine-is-ios');\nvar IS_NODE = require('../internals/engine-is-node');\n\nvar location = global.location;\nvar set = global.setImmediate;\nvar clear = global.clearImmediate;\nvar process = global.process;\nvar MessageChannel = global.MessageChannel;\nvar Dispatch = global.Dispatch;\nvar counter = 0;\nvar queue = {};\nvar ONREADYSTATECHANGE = 'onreadystatechange';\nvar defer, channel, port;\n\nvar run = function (id) {\n // eslint-disable-next-line no-prototype-builtins -- safe\n if (queue.hasOwnProperty(id)) {\n var fn = queue[id];\n delete queue[id];\n fn();\n }\n};\n\nvar runner = function (id) {\n return function () {\n run(id);\n };\n};\n\nvar listener = function (event) {\n run(event.data);\n};\n\nvar post = function (id) {\n // old engines have not location.origin\n global.postMessage(id + '', location.protocol + '//' + location.host);\n};\n\n// Node.js 0.9+ & IE10+ has setImmediate, otherwise:\nif (!set || !clear) {\n set = function setImmediate(fn) {\n var args = [];\n var i = 1;\n while (arguments.length > i) args.push(arguments[i++]);\n queue[++counter] = function () {\n // eslint-disable-next-line no-new-func -- spec requirement\n (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);\n };\n defer(counter);\n return counter;\n };\n clear = function clearImmediate(id) {\n delete queue[id];\n };\n // Node.js 0.8-\n if (IS_NODE) {\n defer = function (id) {\n process.nextTick(runner(id));\n };\n // Sphere (JS game engine) Dispatch API\n } else if (Dispatch && Dispatch.now) {\n defer = function (id) {\n Dispatch.now(runner(id));\n };\n // Browsers with MessageChannel, includes WebWorkers\n // except iOS - https://github.com/zloirock/core-js/issues/624\n } else if (MessageChannel && !IS_IOS) {\n channel = new MessageChannel();\n port = channel.port2;\n channel.port1.onmessage = listener;\n defer = bind(port.postMessage, port, 1);\n // Browsers with postMessage, skip WebWorkers\n // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'\n } else if (\n global.addEventListener &&\n typeof postMessage == 'function' &&\n !global.importScripts &&\n location && location.protocol !== 'file:' &&\n !fails(post)\n ) {\n defer = post;\n global.addEventListener('message', listener, false);\n // IE8-\n } else if (ONREADYSTATECHANGE in createElement('script')) {\n defer = function (id) {\n html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {\n html.removeChild(this);\n run(id);\n };\n };\n // Rest old browsers\n } else {\n defer = function (id) {\n setTimeout(runner(id), 0);\n };\n }\n}\n\nmodule.exports = {\n set: set,\n clear: clear\n};\n","var classof = require('../internals/classof-raw');\n\n// `thisNumberValue` abstract operation\n// https://tc39.es/ecma262/#sec-thisnumbervalue\nmodule.exports = function (value) {\n if (typeof value != 'number' && classof(value) != 'Number') {\n throw TypeError('Incorrect invocation');\n }\n return +value;\n};\n","var toInteger = require('../internals/to-integer');\n\nvar max = Math.max;\nvar min = Math.min;\n\n// Helper for a popular repeating case of the spec:\n// Let integer be ? ToInteger(index).\n// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).\nmodule.exports = function (index, length) {\n var integer = toInteger(index);\n return integer < 0 ? max(integer + length, 0) : min(integer, length);\n};\n","// toObject with fallback for non-array-like ES3 strings\nvar IndexedObject = require('../internals/indexed-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\nmodule.exports = function (it) {\n return IndexedObject(requireObjectCoercible(it));\n};\n","var ceil = Math.ceil;\nvar floor = Math.floor;\n\n// `ToInteger` abstract operation\n// https://tc39.es/ecma262/#sec-tointeger\nmodule.exports = function (argument) {\n return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);\n};\n","var toInteger = require('../internals/to-integer');\n\nvar min = Math.min;\n\n// `ToLength` abstract operation\n// https://tc39.es/ecma262/#sec-tolength\nmodule.exports = function (argument) {\n return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991\n};\n","var requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `ToObject` abstract operation\n// https://tc39.es/ecma262/#sec-toobject\nmodule.exports = function (argument) {\n return Object(requireObjectCoercible(argument));\n};\n","var isObject = require('../internals/is-object');\n\n// `ToPrimitive` abstract operation\n// https://tc39.es/ecma262/#sec-toprimitive\n// instead of the ES6 spec version, we didn't implement @@toPrimitive case\n// and the second argument - flag - preferred type is a string\nmodule.exports = function (input, PREFERRED_STRING) {\n if (!isObject(input)) return input;\n var fn, val;\n if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;\n if (typeof (fn = input.valueOf) == 'function' && !isObject(val = fn.call(input))) return val;\n if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;\n throw TypeError(\"Can't convert object to primitive value\");\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar test = {};\n\ntest[TO_STRING_TAG] = 'z';\n\nmodule.exports = String(test) === '[object z]';\n","var id = 0;\nvar postfix = Math.random();\n\nmodule.exports = function (key) {\n return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);\n};\n","/* eslint-disable es/no-symbol -- required for testing */\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\n\nmodule.exports = NATIVE_SYMBOL\n && !Symbol.sham\n && typeof Symbol.iterator == 'symbol';\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nexports.f = wellKnownSymbol;\n","var global = require('../internals/global');\nvar shared = require('../internals/shared');\nvar has = require('../internals/has');\nvar uid = require('../internals/uid');\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\nvar USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');\n\nvar WellKnownSymbolsStore = shared('wks');\nvar Symbol = global.Symbol;\nvar createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol : Symbol && Symbol.withoutSetter || uid;\n\nmodule.exports = function (name) {\n if (!has(WellKnownSymbolsStore, name) || !(NATIVE_SYMBOL || typeof WellKnownSymbolsStore[name] == 'string')) {\n if (NATIVE_SYMBOL && has(Symbol, name)) {\n WellKnownSymbolsStore[name] = Symbol[name];\n } else {\n WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);\n }\n } return WellKnownSymbolsStore[name];\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isArray = require('../internals/is-array');\nvar isObject = require('../internals/is-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar createProperty = require('../internals/create-property');\nvar arraySpeciesCreate = require('../internals/array-species-create');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');\nvar MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;\nvar MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';\n\n// We can't use this feature detection in V8 since it causes\n// deoptimization and serious performance degradation\n// https://github.com/zloirock/core-js/issues/679\nvar IS_CONCAT_SPREADABLE_SUPPORT = V8_VERSION >= 51 || !fails(function () {\n var array = [];\n array[IS_CONCAT_SPREADABLE] = false;\n return array.concat()[0] !== array;\n});\n\nvar SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');\n\nvar isConcatSpreadable = function (O) {\n if (!isObject(O)) return false;\n var spreadable = O[IS_CONCAT_SPREADABLE];\n return spreadable !== undefined ? !!spreadable : isArray(O);\n};\n\nvar FORCED = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;\n\n// `Array.prototype.concat` method\n// https://tc39.es/ecma262/#sec-array.prototype.concat\n// with adding support of @@isConcatSpreadable and @@species\n$({ target: 'Array', proto: true, forced: FORCED }, {\n // eslint-disable-next-line no-unused-vars -- required for `.length`\n concat: function concat(arg) {\n var O = toObject(this);\n var A = arraySpeciesCreate(O, 0);\n var n = 0;\n var i, k, length, len, E;\n for (i = -1, length = arguments.length; i < length; i++) {\n E = i === -1 ? O : arguments[i];\n if (isConcatSpreadable(E)) {\n len = toLength(E.length);\n if (n + len > MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);\n for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);\n } else {\n if (n >= MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);\n createProperty(A, n++, E);\n }\n }\n A.length = n;\n return A;\n }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $filter = require('../internals/array-iteration').filter;\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');\n\n// `Array.prototype.filter` method\n// https://tc39.es/ecma262/#sec-array.prototype.filter\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {\n filter: function filter(callbackfn /* , thisArg */) {\n return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $findIndex = require('../internals/array-iteration').findIndex;\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\nvar FIND_INDEX = 'findIndex';\nvar SKIPS_HOLES = true;\n\n// Shouldn't skip holes\nif (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });\n\n// `Array.prototype.findIndex` method\n// https://tc39.es/ecma262/#sec-array.prototype.findindex\n$({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {\n findIndex: function findIndex(callbackfn /* , that = undefined */) {\n return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n }\n});\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables(FIND_INDEX);\n","'use strict';\nvar $ = require('../internals/export');\nvar $find = require('../internals/array-iteration').find;\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\nvar FIND = 'find';\nvar SKIPS_HOLES = true;\n\n// Shouldn't skip holes\nif (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES = false; });\n\n// `Array.prototype.find` method\n// https://tc39.es/ecma262/#sec-array.prototype.find\n$({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {\n find: function find(callbackfn /* , that = undefined */) {\n return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n }\n});\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables(FIND);\n","'use strict';\nvar $ = require('../internals/export');\nvar flattenIntoArray = require('../internals/flatten-into-array');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar aFunction = require('../internals/a-function');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\n// `Array.prototype.flatMap` method\n// https://tc39.es/ecma262/#sec-array.prototype.flatmap\n$({ target: 'Array', proto: true }, {\n flatMap: function flatMap(callbackfn /* , thisArg */) {\n var O = toObject(this);\n var sourceLen = toLength(O.length);\n var A;\n aFunction(callbackfn);\n A = arraySpeciesCreate(O, 0);\n A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n return A;\n }\n});\n","var $ = require('../internals/export');\nvar from = require('../internals/array-from');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\n\nvar INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {\n // eslint-disable-next-line es/no-array-from -- required for testing\n Array.from(iterable);\n});\n\n// `Array.from` method\n// https://tc39.es/ecma262/#sec-array.from\n$({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {\n from: from\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $includes = require('../internals/array-includes').includes;\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\n// `Array.prototype.includes` method\n// https://tc39.es/ecma262/#sec-array.prototype.includes\n$({ target: 'Array', proto: true }, {\n includes: function includes(el /* , fromIndex = 0 */) {\n return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);\n }\n});\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('includes');\n","'use strict';\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar Iterators = require('../internals/iterators');\nvar InternalStateModule = require('../internals/internal-state');\nvar defineIterator = require('../internals/define-iterator');\n\nvar ARRAY_ITERATOR = 'Array Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(ARRAY_ITERATOR);\n\n// `Array.prototype.entries` method\n// https://tc39.es/ecma262/#sec-array.prototype.entries\n// `Array.prototype.keys` method\n// https://tc39.es/ecma262/#sec-array.prototype.keys\n// `Array.prototype.values` method\n// https://tc39.es/ecma262/#sec-array.prototype.values\n// `Array.prototype[@@iterator]` method\n// https://tc39.es/ecma262/#sec-array.prototype-@@iterator\n// `CreateArrayIterator` internal method\n// https://tc39.es/ecma262/#sec-createarrayiterator\nmodule.exports = defineIterator(Array, 'Array', function (iterated, kind) {\n setInternalState(this, {\n type: ARRAY_ITERATOR,\n target: toIndexedObject(iterated), // target\n index: 0, // next index\n kind: kind // kind\n });\n// `%ArrayIteratorPrototype%.next` method\n// https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next\n}, function () {\n var state = getInternalState(this);\n var target = state.target;\n var kind = state.kind;\n var index = state.index++;\n if (!target || index >= target.length) {\n state.target = undefined;\n return { value: undefined, done: true };\n }\n if (kind == 'keys') return { value: index, done: false };\n if (kind == 'values') return { value: target[index], done: false };\n return { value: [index, target[index]], done: false };\n}, 'values');\n\n// argumentsList[@@iterator] is %ArrayProto_values%\n// https://tc39.es/ecma262/#sec-createunmappedargumentsobject\n// https://tc39.es/ecma262/#sec-createmappedargumentsobject\nIterators.Arguments = Iterators.Array;\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('keys');\naddToUnscopables('values');\naddToUnscopables('entries');\n","'use strict';\nvar $ = require('../internals/export');\nvar IndexedObject = require('../internals/indexed-object');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\n\nvar nativeJoin = [].join;\n\nvar ES3_STRINGS = IndexedObject != Object;\nvar STRICT_METHOD = arrayMethodIsStrict('join', ',');\n\n// `Array.prototype.join` method\n// https://tc39.es/ecma262/#sec-array.prototype.join\n$({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD }, {\n join: function join(separator) {\n return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);\n }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $map = require('../internals/array-iteration').map;\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map');\n\n// `Array.prototype.map` method\n// https://tc39.es/ecma262/#sec-array.prototype.map\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {\n map: function map(callbackfn /* , thisArg */) {\n return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $reduce = require('../internals/array-reduce').left;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar CHROME_VERSION = require('../internals/engine-v8-version');\nvar IS_NODE = require('../internals/engine-is-node');\n\nvar STRICT_METHOD = arrayMethodIsStrict('reduce');\n// Chrome 80-82 has a critical bug\n// https://bugs.chromium.org/p/chromium/issues/detail?id=1049982\nvar CHROME_BUG = !IS_NODE && CHROME_VERSION > 79 && CHROME_VERSION < 83;\n\n// `Array.prototype.reduce` method\n// https://tc39.es/ecma262/#sec-array.prototype.reduce\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, {\n reduce: function reduce(callbackfn /* , initialValue */) {\n return $reduce(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar isArray = require('../internals/is-array');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar createProperty = require('../internals/create-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('slice');\n\nvar SPECIES = wellKnownSymbol('species');\nvar nativeSlice = [].slice;\nvar max = Math.max;\n\n// `Array.prototype.slice` method\n// https://tc39.es/ecma262/#sec-array.prototype.slice\n// fallback for not array-like ES3 strings and DOM objects\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {\n slice: function slice(start, end) {\n var O = toIndexedObject(this);\n var length = toLength(O.length);\n var k = toAbsoluteIndex(start, length);\n var fin = toAbsoluteIndex(end === undefined ? length : end, length);\n // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible\n var Constructor, result, n;\n if (isArray(O)) {\n Constructor = O.constructor;\n // cross-realm fallback\n if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {\n Constructor = undefined;\n } else if (isObject(Constructor)) {\n Constructor = Constructor[SPECIES];\n if (Constructor === null) Constructor = undefined;\n }\n if (Constructor === Array || Constructor === undefined) {\n return nativeSlice.call(O, k, fin);\n }\n }\n result = new (Constructor === undefined ? Array : Constructor)(max(fin - k, 0));\n for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);\n result.length = n;\n return result;\n }\n});\n","// this method was added to unscopables after implementation\n// in popular engines, so it's moved to a separate module\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('flatMap');\n","var DESCRIPTORS = require('../internals/descriptors');\nvar defineProperty = require('../internals/object-define-property').f;\n\nvar FunctionPrototype = Function.prototype;\nvar FunctionPrototypeToString = FunctionPrototype.toString;\nvar nameRE = /^\\s*function ([^ (]*)/;\nvar NAME = 'name';\n\n// Function instances `.name` property\n// https://tc39.es/ecma262/#sec-function-instances-name\nif (DESCRIPTORS && !(NAME in FunctionPrototype)) {\n defineProperty(FunctionPrototype, NAME, {\n configurable: true,\n get: function () {\n try {\n return FunctionPrototypeToString.call(this).match(nameRE)[1];\n } catch (error) {\n return '';\n }\n }\n });\n}\n","var $ = require('../internals/export');\n\nvar log = Math.log;\nvar LN2 = Math.LN2;\n\n// `Math.log2` method\n// https://tc39.es/ecma262/#sec-math.log2\n$({ target: 'Math', stat: true }, {\n log2: function log2(x) {\n return log(x) / LN2;\n }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar toInteger = require('../internals/to-integer');\nvar thisNumberValue = require('../internals/this-number-value');\nvar repeat = require('../internals/string-repeat');\nvar fails = require('../internals/fails');\n\nvar nativeToFixed = 1.0.toFixed;\nvar floor = Math.floor;\n\nvar pow = function (x, n, acc) {\n return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc);\n};\n\nvar log = function (x) {\n var n = 0;\n var x2 = x;\n while (x2 >= 4096) {\n n += 12;\n x2 /= 4096;\n }\n while (x2 >= 2) {\n n += 1;\n x2 /= 2;\n } return n;\n};\n\nvar multiply = function (data, n, c) {\n var index = -1;\n var c2 = c;\n while (++index < 6) {\n c2 += n * data[index];\n data[index] = c2 % 1e7;\n c2 = floor(c2 / 1e7);\n }\n};\n\nvar divide = function (data, n) {\n var index = 6;\n var c = 0;\n while (--index >= 0) {\n c += data[index];\n data[index] = floor(c / n);\n c = (c % n) * 1e7;\n }\n};\n\nvar dataToString = function (data) {\n var index = 6;\n var s = '';\n while (--index >= 0) {\n if (s !== '' || index === 0 || data[index] !== 0) {\n var t = String(data[index]);\n s = s === '' ? t : s + repeat.call('0', 7 - t.length) + t;\n }\n } return s;\n};\n\nvar FORCED = nativeToFixed && (\n 0.00008.toFixed(3) !== '0.000' ||\n 0.9.toFixed(0) !== '1' ||\n 1.255.toFixed(2) !== '1.25' ||\n 1000000000000000128.0.toFixed(0) !== '1000000000000000128'\n) || !fails(function () {\n // V8 ~ Android 4.3-\n nativeToFixed.call({});\n});\n\n// `Number.prototype.toFixed` method\n// https://tc39.es/ecma262/#sec-number.prototype.tofixed\n$({ target: 'Number', proto: true, forced: FORCED }, {\n toFixed: function toFixed(fractionDigits) {\n var number = thisNumberValue(this);\n var fractDigits = toInteger(fractionDigits);\n var data = [0, 0, 0, 0, 0, 0];\n var sign = '';\n var result = '0';\n var e, z, j, k;\n\n if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');\n // eslint-disable-next-line no-self-compare -- NaN check\n if (number != number) return 'NaN';\n if (number <= -1e21 || number >= 1e21) return String(number);\n if (number < 0) {\n sign = '-';\n number = -number;\n }\n if (number > 1e-21) {\n e = log(number * pow(2, 69, 1)) - 69;\n z = e < 0 ? number * pow(2, -e, 1) : number / pow(2, e, 1);\n z *= 0x10000000000000;\n e = 52 - e;\n if (e > 0) {\n multiply(data, 0, z);\n j = fractDigits;\n while (j >= 7) {\n multiply(data, 1e7, 0);\n j -= 7;\n }\n multiply(data, pow(10, j, 1), 0);\n j = e - 1;\n while (j >= 23) {\n divide(data, 1 << 23);\n j -= 23;\n }\n divide(data, 1 << j);\n multiply(data, 1, 1);\n divide(data, 2);\n result = dataToString(data);\n } else {\n multiply(data, 0, z);\n multiply(data, 1 << -e, 0);\n result = dataToString(data) + repeat.call('0', fractDigits);\n }\n }\n if (fractDigits > 0) {\n k = result.length;\n result = sign + (k <= fractDigits\n ? '0.' + repeat.call('0', fractDigits - k) + result\n : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));\n } else {\n result = sign + result;\n } return result;\n }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar nativeGetOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar DESCRIPTORS = require('../internals/descriptors');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeGetOwnPropertyDescriptor(1); });\nvar FORCED = !DESCRIPTORS || FAILS_ON_PRIMITIVES;\n\n// `Object.getOwnPropertyDescriptor` method\n// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor\n$({ target: 'Object', stat: true, forced: FORCED, sham: !DESCRIPTORS }, {\n getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {\n return nativeGetOwnPropertyDescriptor(toIndexedObject(it), key);\n }\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar ownKeys = require('../internals/own-keys');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar createProperty = require('../internals/create-property');\n\n// `Object.getOwnPropertyDescriptors` method\n// https://tc39.es/ecma262/#sec-object.getownpropertydescriptors\n$({ target: 'Object', stat: true, sham: !DESCRIPTORS }, {\n getOwnPropertyDescriptors: function getOwnPropertyDescriptors(object) {\n var O = toIndexedObject(object);\n var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\n var keys = ownKeys(O);\n var result = {};\n var index = 0;\n var key, descriptor;\n while (keys.length > index) {\n descriptor = getOwnPropertyDescriptor(O, key = keys[index++]);\n if (descriptor !== undefined) createProperty(result, key, descriptor);\n }\n return result;\n }\n});\n","var $ = require('../internals/export');\nvar toObject = require('../internals/to-object');\nvar nativeKeys = require('../internals/object-keys');\nvar fails = require('../internals/fails');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeKeys(1); });\n\n// `Object.keys` method\n// https://tc39.es/ecma262/#sec-object.keys\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n keys: function keys(it) {\n return nativeKeys(toObject(it));\n }\n});\n","var TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar redefine = require('../internals/redefine');\nvar toString = require('../internals/object-to-string');\n\n// `Object.prototype.toString` method\n// https://tc39.es/ecma262/#sec-object.prototype.tostring\nif (!TO_STRING_TAG_SUPPORT) {\n redefine(Object.prototype, 'toString', toString, { unsafe: true });\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar global = require('../internals/global');\nvar getBuiltIn = require('../internals/get-built-in');\nvar NativePromise = require('../internals/native-promise-constructor');\nvar redefine = require('../internals/redefine');\nvar redefineAll = require('../internals/redefine-all');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar setSpecies = require('../internals/set-species');\nvar isObject = require('../internals/is-object');\nvar aFunction = require('../internals/a-function');\nvar anInstance = require('../internals/an-instance');\nvar inspectSource = require('../internals/inspect-source');\nvar iterate = require('../internals/iterate');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\nvar speciesConstructor = require('../internals/species-constructor');\nvar task = require('../internals/task').set;\nvar microtask = require('../internals/microtask');\nvar promiseResolve = require('../internals/promise-resolve');\nvar hostReportErrors = require('../internals/host-report-errors');\nvar newPromiseCapabilityModule = require('../internals/new-promise-capability');\nvar perform = require('../internals/perform');\nvar InternalStateModule = require('../internals/internal-state');\nvar isForced = require('../internals/is-forced');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_NODE = require('../internals/engine-is-node');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar SPECIES = wellKnownSymbol('species');\nvar PROMISE = 'Promise';\nvar getInternalState = InternalStateModule.get;\nvar setInternalState = InternalStateModule.set;\nvar getInternalPromiseState = InternalStateModule.getterFor(PROMISE);\nvar PromiseConstructor = NativePromise;\nvar TypeError = global.TypeError;\nvar document = global.document;\nvar process = global.process;\nvar $fetch = getBuiltIn('fetch');\nvar newPromiseCapability = newPromiseCapabilityModule.f;\nvar newGenericPromiseCapability = newPromiseCapability;\nvar DISPATCH_EVENT = !!(document && document.createEvent && global.dispatchEvent);\nvar NATIVE_REJECTION_EVENT = typeof PromiseRejectionEvent == 'function';\nvar UNHANDLED_REJECTION = 'unhandledrejection';\nvar REJECTION_HANDLED = 'rejectionhandled';\nvar PENDING = 0;\nvar FULFILLED = 1;\nvar REJECTED = 2;\nvar HANDLED = 1;\nvar UNHANDLED = 2;\nvar Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;\n\nvar FORCED = isForced(PROMISE, function () {\n var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);\n if (!GLOBAL_CORE_JS_PROMISE) {\n // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables\n // https://bugs.chromium.org/p/chromium/issues/detail?id=830565\n // We can't detect it synchronously, so just check versions\n if (V8_VERSION === 66) return true;\n // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test\n if (!IS_NODE && !NATIVE_REJECTION_EVENT) return true;\n }\n // We need Promise#finally in the pure version for preventing prototype pollution\n if (IS_PURE && !PromiseConstructor.prototype['finally']) return true;\n // We can't use @@species feature detection in V8 since it causes\n // deoptimization and performance degradation\n // https://github.com/zloirock/core-js/issues/679\n if (V8_VERSION >= 51 && /native code/.test(PromiseConstructor)) return false;\n // Detect correctness of subclassing with @@species support\n var promise = PromiseConstructor.resolve(1);\n var FakePromise = function (exec) {\n exec(function () { /* empty */ }, function () { /* empty */ });\n };\n var constructor = promise.constructor = {};\n constructor[SPECIES] = FakePromise;\n return !(promise.then(function () { /* empty */ }) instanceof FakePromise);\n});\n\nvar INCORRECT_ITERATION = FORCED || !checkCorrectnessOfIteration(function (iterable) {\n PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });\n});\n\n// helpers\nvar isThenable = function (it) {\n var then;\n return isObject(it) && typeof (then = it.then) == 'function' ? then : false;\n};\n\nvar notify = function (state, isReject) {\n if (state.notified) return;\n state.notified = true;\n var chain = state.reactions;\n microtask(function () {\n var value = state.value;\n var ok = state.state == FULFILLED;\n var index = 0;\n // variable length - can't use forEach\n while (chain.length > index) {\n var reaction = chain[index++];\n var handler = ok ? reaction.ok : reaction.fail;\n var resolve = reaction.resolve;\n var reject = reaction.reject;\n var domain = reaction.domain;\n var result, then, exited;\n try {\n if (handler) {\n if (!ok) {\n if (state.rejection === UNHANDLED) onHandleUnhandled(state);\n state.rejection = HANDLED;\n }\n if (handler === true) result = value;\n else {\n if (domain) domain.enter();\n result = handler(value); // can throw\n if (domain) {\n domain.exit();\n exited = true;\n }\n }\n if (result === reaction.promise) {\n reject(TypeError('Promise-chain cycle'));\n } else if (then = isThenable(result)) {\n then.call(result, resolve, reject);\n } else resolve(result);\n } else reject(value);\n } catch (error) {\n if (domain && !exited) domain.exit();\n reject(error);\n }\n }\n state.reactions = [];\n state.notified = false;\n if (isReject && !state.rejection) onUnhandled(state);\n });\n};\n\nvar dispatchEvent = function (name, promise, reason) {\n var event, handler;\n if (DISPATCH_EVENT) {\n event = document.createEvent('Event');\n event.promise = promise;\n event.reason = reason;\n event.initEvent(name, false, true);\n global.dispatchEvent(event);\n } else event = { promise: promise, reason: reason };\n if (!NATIVE_REJECTION_EVENT && (handler = global['on' + name])) handler(event);\n else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);\n};\n\nvar onUnhandled = function (state) {\n task.call(global, function () {\n var promise = state.facade;\n var value = state.value;\n var IS_UNHANDLED = isUnhandled(state);\n var result;\n if (IS_UNHANDLED) {\n result = perform(function () {\n if (IS_NODE) {\n process.emit('unhandledRejection', value, promise);\n } else dispatchEvent(UNHANDLED_REJECTION, promise, value);\n });\n // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should\n state.rejection = IS_NODE || isUnhandled(state) ? UNHANDLED : HANDLED;\n if (result.error) throw result.value;\n }\n });\n};\n\nvar isUnhandled = function (state) {\n return state.rejection !== HANDLED && !state.parent;\n};\n\nvar onHandleUnhandled = function (state) {\n task.call(global, function () {\n var promise = state.facade;\n if (IS_NODE) {\n process.emit('rejectionHandled', promise);\n } else dispatchEvent(REJECTION_HANDLED, promise, state.value);\n });\n};\n\nvar bind = function (fn, state, unwrap) {\n return function (value) {\n fn(state, value, unwrap);\n };\n};\n\nvar internalReject = function (state, value, unwrap) {\n if (state.done) return;\n state.done = true;\n if (unwrap) state = unwrap;\n state.value = value;\n state.state = REJECTED;\n notify(state, true);\n};\n\nvar internalResolve = function (state, value, unwrap) {\n if (state.done) return;\n state.done = true;\n if (unwrap) state = unwrap;\n try {\n if (state.facade === value) throw TypeError(\"Promise can't be resolved itself\");\n var then = isThenable(value);\n if (then) {\n microtask(function () {\n var wrapper = { done: false };\n try {\n then.call(value,\n bind(internalResolve, wrapper, state),\n bind(internalReject, wrapper, state)\n );\n } catch (error) {\n internalReject(wrapper, error, state);\n }\n });\n } else {\n state.value = value;\n state.state = FULFILLED;\n notify(state, false);\n }\n } catch (error) {\n internalReject({ done: false }, error, state);\n }\n};\n\n// constructor polyfill\nif (FORCED) {\n // 25.4.3.1 Promise(executor)\n PromiseConstructor = function Promise(executor) {\n anInstance(this, PromiseConstructor, PROMISE);\n aFunction(executor);\n Internal.call(this);\n var state = getInternalState(this);\n try {\n executor(bind(internalResolve, state), bind(internalReject, state));\n } catch (error) {\n internalReject(state, error);\n }\n };\n // eslint-disable-next-line no-unused-vars -- required for `.length`\n Internal = function Promise(executor) {\n setInternalState(this, {\n type: PROMISE,\n done: false,\n notified: false,\n parent: false,\n reactions: [],\n rejection: false,\n state: PENDING,\n value: undefined\n });\n };\n Internal.prototype = redefineAll(PromiseConstructor.prototype, {\n // `Promise.prototype.then` method\n // https://tc39.es/ecma262/#sec-promise.prototype.then\n then: function then(onFulfilled, onRejected) {\n var state = getInternalPromiseState(this);\n var reaction = newPromiseCapability(speciesConstructor(this, PromiseConstructor));\n reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;\n reaction.fail = typeof onRejected == 'function' && onRejected;\n reaction.domain = IS_NODE ? process.domain : undefined;\n state.parent = true;\n state.reactions.push(reaction);\n if (state.state != PENDING) notify(state, false);\n return reaction.promise;\n },\n // `Promise.prototype.catch` method\n // https://tc39.es/ecma262/#sec-promise.prototype.catch\n 'catch': function (onRejected) {\n return this.then(undefined, onRejected);\n }\n });\n OwnPromiseCapability = function () {\n var promise = new Internal();\n var state = getInternalState(promise);\n this.promise = promise;\n this.resolve = bind(internalResolve, state);\n this.reject = bind(internalReject, state);\n };\n newPromiseCapabilityModule.f = newPromiseCapability = function (C) {\n return C === PromiseConstructor || C === PromiseWrapper\n ? new OwnPromiseCapability(C)\n : newGenericPromiseCapability(C);\n };\n\n if (!IS_PURE && typeof NativePromise == 'function') {\n nativeThen = NativePromise.prototype.then;\n\n // wrap native Promise#then for native async functions\n redefine(NativePromise.prototype, 'then', function then(onFulfilled, onRejected) {\n var that = this;\n return new PromiseConstructor(function (resolve, reject) {\n nativeThen.call(that, resolve, reject);\n }).then(onFulfilled, onRejected);\n // https://github.com/zloirock/core-js/issues/640\n }, { unsafe: true });\n\n // wrap fetch result\n if (typeof $fetch == 'function') $({ global: true, enumerable: true, forced: true }, {\n // eslint-disable-next-line no-unused-vars -- required for `.length`\n fetch: function fetch(input /* , init */) {\n return promiseResolve(PromiseConstructor, $fetch.apply(global, arguments));\n }\n });\n }\n}\n\n$({ global: true, wrap: true, forced: FORCED }, {\n Promise: PromiseConstructor\n});\n\nsetToStringTag(PromiseConstructor, PROMISE, false, true);\nsetSpecies(PROMISE);\n\nPromiseWrapper = getBuiltIn(PROMISE);\n\n// statics\n$({ target: PROMISE, stat: true, forced: FORCED }, {\n // `Promise.reject` method\n // https://tc39.es/ecma262/#sec-promise.reject\n reject: function reject(r) {\n var capability = newPromiseCapability(this);\n capability.reject.call(undefined, r);\n return capability.promise;\n }\n});\n\n$({ target: PROMISE, stat: true, forced: IS_PURE || FORCED }, {\n // `Promise.resolve` method\n // https://tc39.es/ecma262/#sec-promise.resolve\n resolve: function resolve(x) {\n return promiseResolve(IS_PURE && this === PromiseWrapper ? PromiseConstructor : this, x);\n }\n});\n\n$({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION }, {\n // `Promise.all` method\n // https://tc39.es/ecma262/#sec-promise.all\n all: function all(iterable) {\n var C = this;\n var capability = newPromiseCapability(C);\n var resolve = capability.resolve;\n var reject = capability.reject;\n var result = perform(function () {\n var $promiseResolve = aFunction(C.resolve);\n var values = [];\n var counter = 0;\n var remaining = 1;\n iterate(iterable, function (promise) {\n var index = counter++;\n var alreadyCalled = false;\n values.push(undefined);\n remaining++;\n $promiseResolve.call(C, promise).then(function (value) {\n if (alreadyCalled) return;\n alreadyCalled = true;\n values[index] = value;\n --remaining || resolve(values);\n }, reject);\n });\n --remaining || resolve(values);\n });\n if (result.error) reject(result.value);\n return capability.promise;\n },\n // `Promise.race` method\n // https://tc39.es/ecma262/#sec-promise.race\n race: function race(iterable) {\n var C = this;\n var capability = newPromiseCapability(C);\n var reject = capability.reject;\n var result = perform(function () {\n var $promiseResolve = aFunction(C.resolve);\n iterate(iterable, function (promise) {\n $promiseResolve.call(C, promise).then(capability.resolve, reject);\n });\n });\n if (result.error) reject(result.value);\n return capability.promise;\n }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar exec = require('../internals/regexp-exec');\n\n// `RegExp.prototype.exec` method\n// https://tc39.es/ecma262/#sec-regexp.prototype.exec\n$({ target: 'RegExp', proto: true, forced: /./.exec !== exec }, {\n exec: exec\n});\n","'use strict';\nvar redefine = require('../internals/redefine');\nvar anObject = require('../internals/an-object');\nvar fails = require('../internals/fails');\nvar flags = require('../internals/regexp-flags');\n\nvar TO_STRING = 'toString';\nvar RegExpPrototype = RegExp.prototype;\nvar nativeToString = RegExpPrototype[TO_STRING];\n\nvar NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });\n// FF44- RegExp#toString has a wrong name\nvar INCORRECT_NAME = nativeToString.name != TO_STRING;\n\n// `RegExp.prototype.toString` method\n// https://tc39.es/ecma262/#sec-regexp.prototype.tostring\nif (NOT_GENERIC || INCORRECT_NAME) {\n redefine(RegExp.prototype, TO_STRING, function toString() {\n var R = anObject(this);\n var p = String(R.source);\n var rf = R.flags;\n var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? flags.call(R) : rf);\n return '/' + p + '/' + f;\n }, { unsafe: true });\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar notARegExp = require('../internals/not-a-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\n\n// `String.prototype.includes` method\n// https://tc39.es/ecma262/#sec-string.prototype.includes\n$({ target: 'String', proto: true, forced: !correctIsRegExpLogic('includes') }, {\n includes: function includes(searchString /* , position = 0 */) {\n return !!~String(requireObjectCoercible(this))\n .indexOf(notARegExp(searchString), arguments.length > 1 ? arguments[1] : undefined);\n }\n});\n","'use strict';\nvar charAt = require('../internals/string-multibyte').charAt;\nvar InternalStateModule = require('../internals/internal-state');\nvar defineIterator = require('../internals/define-iterator');\n\nvar STRING_ITERATOR = 'String Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(STRING_ITERATOR);\n\n// `String.prototype[@@iterator]` method\n// https://tc39.es/ecma262/#sec-string.prototype-@@iterator\ndefineIterator(String, 'String', function (iterated) {\n setInternalState(this, {\n type: STRING_ITERATOR,\n string: String(iterated),\n index: 0\n });\n// `%StringIteratorPrototype%.next` method\n// https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next\n}, function next() {\n var state = getInternalState(this);\n var string = state.string;\n var index = state.index;\n var point;\n if (index >= string.length) return { value: undefined, done: true };\n point = charAt(string, index);\n state.index += point.length;\n return { value: point, done: false };\n});\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar toLength = require('../internals/to-length');\nvar toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar getSubstitution = require('../internals/get-substitution');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\nvar max = Math.max;\nvar min = Math.min;\n\nvar maybeToString = function (it) {\n return it === undefined ? it : String(it);\n};\n\n// @@replace logic\nfixRegExpWellKnownSymbolLogic('replace', 2, function (REPLACE, nativeReplace, maybeCallNative, reason) {\n var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = reason.REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE;\n var REPLACE_KEEPS_$0 = reason.REPLACE_KEEPS_$0;\n var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';\n\n return [\n // `String.prototype.replace` method\n // https://tc39.es/ecma262/#sec-string.prototype.replace\n function replace(searchValue, replaceValue) {\n var O = requireObjectCoercible(this);\n var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];\n return replacer !== undefined\n ? replacer.call(searchValue, O, replaceValue)\n : nativeReplace.call(String(O), searchValue, replaceValue);\n },\n // `RegExp.prototype[@@replace]` method\n // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace\n function (regexp, replaceValue) {\n if (\n (!REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE && REPLACE_KEEPS_$0) ||\n (typeof replaceValue === 'string' && replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1)\n ) {\n var res = maybeCallNative(nativeReplace, regexp, this, replaceValue);\n if (res.done) return res.value;\n }\n\n var rx = anObject(regexp);\n var S = String(this);\n\n var functionalReplace = typeof replaceValue === 'function';\n if (!functionalReplace) replaceValue = String(replaceValue);\n\n var global = rx.global;\n if (global) {\n var fullUnicode = rx.unicode;\n rx.lastIndex = 0;\n }\n var results = [];\n while (true) {\n var result = regExpExec(rx, S);\n if (result === null) break;\n\n results.push(result);\n if (!global) break;\n\n var matchStr = String(result[0]);\n if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);\n }\n\n var accumulatedResult = '';\n var nextSourcePosition = 0;\n for (var i = 0; i < results.length; i++) {\n result = results[i];\n\n var matched = String(result[0]);\n var position = max(min(toInteger(result.index), S.length), 0);\n var captures = [];\n // NOTE: This is equivalent to\n // captures = result.slice(1).map(maybeToString)\n // but for some reason `nativeSlice.call(result, 1, result.length)` (called in\n // the slice polyfill when slicing native arrays) \"doesn't work\" in safari 9 and\n // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.\n for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));\n var namedCaptures = result.groups;\n if (functionalReplace) {\n var replacerArgs = [matched].concat(captures, position, S);\n if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);\n var replacement = String(replaceValue.apply(undefined, replacerArgs));\n } else {\n replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);\n }\n if (position >= nextSourcePosition) {\n accumulatedResult += S.slice(nextSourcePosition, position) + replacement;\n nextSourcePosition = position + matched.length;\n }\n }\n return accumulatedResult + S.slice(nextSourcePosition);\n }\n ];\n});\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar sameValue = require('../internals/same-value');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\n// @@search logic\nfixRegExpWellKnownSymbolLogic('search', 1, function (SEARCH, nativeSearch, maybeCallNative) {\n return [\n // `String.prototype.search` method\n // https://tc39.es/ecma262/#sec-string.prototype.search\n function search(regexp) {\n var O = requireObjectCoercible(this);\n var searcher = regexp == undefined ? undefined : regexp[SEARCH];\n return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));\n },\n // `RegExp.prototype[@@search]` method\n // https://tc39.es/ecma262/#sec-regexp.prototype-@@search\n function (regexp) {\n var res = maybeCallNative(nativeSearch, regexp, this);\n if (res.done) return res.value;\n\n var rx = anObject(regexp);\n var S = String(this);\n\n var previousLastIndex = rx.lastIndex;\n if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;\n var result = regExpExec(rx, S);\n if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;\n return result === null ? -1 : result.index;\n }\n ];\n});\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar isRegExp = require('../internals/is-regexp');\nvar anObject = require('../internals/an-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar speciesConstructor = require('../internals/species-constructor');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar toLength = require('../internals/to-length');\nvar callRegExpExec = require('../internals/regexp-exec-abstract');\nvar regexpExec = require('../internals/regexp-exec');\nvar stickyHelpers = require('../internals/regexp-sticky-helpers');\n\nvar UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;\nvar arrayPush = [].push;\nvar min = Math.min;\nvar MAX_UINT32 = 0xFFFFFFFF;\n\n// @@split logic\nfixRegExpWellKnownSymbolLogic('split', 2, function (SPLIT, nativeSplit, maybeCallNative) {\n var internalSplit;\n if (\n 'abbc'.split(/(b)*/)[1] == 'c' ||\n // eslint-disable-next-line regexp/no-empty-group -- required for testing\n 'test'.split(/(?:)/, -1).length != 4 ||\n 'ab'.split(/(?:ab)*/).length != 2 ||\n '.'.split(/(.?)(.?)/).length != 4 ||\n // eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group -- required for testing\n '.'.split(/()()/).length > 1 ||\n ''.split(/.?/).length\n ) {\n // based on es5-shim implementation, need to rework it\n internalSplit = function (separator, limit) {\n var string = String(requireObjectCoercible(this));\n var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n if (lim === 0) return [];\n if (separator === undefined) return [string];\n // If `separator` is not a regex, use native split\n if (!isRegExp(separator)) {\n return nativeSplit.call(string, separator, lim);\n }\n var output = [];\n var flags = (separator.ignoreCase ? 'i' : '') +\n (separator.multiline ? 'm' : '') +\n (separator.unicode ? 'u' : '') +\n (separator.sticky ? 'y' : '');\n var lastLastIndex = 0;\n // Make `global` and avoid `lastIndex` issues by working with a copy\n var separatorCopy = new RegExp(separator.source, flags + 'g');\n var match, lastIndex, lastLength;\n while (match = regexpExec.call(separatorCopy, string)) {\n lastIndex = separatorCopy.lastIndex;\n if (lastIndex > lastLastIndex) {\n output.push(string.slice(lastLastIndex, match.index));\n if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));\n lastLength = match[0].length;\n lastLastIndex = lastIndex;\n if (output.length >= lim) break;\n }\n if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop\n }\n if (lastLastIndex === string.length) {\n if (lastLength || !separatorCopy.test('')) output.push('');\n } else output.push(string.slice(lastLastIndex));\n return output.length > lim ? output.slice(0, lim) : output;\n };\n // Chakra, V8\n } else if ('0'.split(undefined, 0).length) {\n internalSplit = function (separator, limit) {\n return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);\n };\n } else internalSplit = nativeSplit;\n\n return [\n // `String.prototype.split` method\n // https://tc39.es/ecma262/#sec-string.prototype.split\n function split(separator, limit) {\n var O = requireObjectCoercible(this);\n var splitter = separator == undefined ? undefined : separator[SPLIT];\n return splitter !== undefined\n ? splitter.call(separator, O, limit)\n : internalSplit.call(String(O), separator, limit);\n },\n // `RegExp.prototype[@@split]` method\n // https://tc39.es/ecma262/#sec-regexp.prototype-@@split\n //\n // NOTE: This cannot be properly polyfilled in engines that don't support\n // the 'y' flag.\n function (regexp, limit) {\n var res = maybeCallNative(internalSplit, regexp, this, limit, internalSplit !== nativeSplit);\n if (res.done) return res.value;\n\n var rx = anObject(regexp);\n var S = String(this);\n var C = speciesConstructor(rx, RegExp);\n\n var unicodeMatching = rx.unicode;\n var flags = (rx.ignoreCase ? 'i' : '') +\n (rx.multiline ? 'm' : '') +\n (rx.unicode ? 'u' : '') +\n (UNSUPPORTED_Y ? 'g' : 'y');\n\n // ^(? + rx + ) is needed, in combination with some S slicing, to\n // simulate the 'y' flag.\n var splitter = new C(UNSUPPORTED_Y ? '^(?:' + rx.source + ')' : rx, flags);\n var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n if (lim === 0) return [];\n if (S.length === 0) return callRegExpExec(splitter, S) === null ? [S] : [];\n var p = 0;\n var q = 0;\n var A = [];\n while (q < S.length) {\n splitter.lastIndex = UNSUPPORTED_Y ? 0 : q;\n var z = callRegExpExec(splitter, UNSUPPORTED_Y ? S.slice(q) : S);\n var e;\n if (\n z === null ||\n (e = min(toLength(splitter.lastIndex + (UNSUPPORTED_Y ? q : 0)), S.length)) === p\n ) {\n q = advanceStringIndex(S, q, unicodeMatching);\n } else {\n A.push(S.slice(p, q));\n if (A.length === lim) return A;\n for (var i = 1; i <= z.length - 1; i++) {\n A.push(z[i]);\n if (A.length === lim) return A;\n }\n q = p = e;\n }\n }\n A.push(S.slice(p));\n return A;\n }\n ];\n}, UNSUPPORTED_Y);\n","// `Symbol.prototype.description` getter\n// https://tc39.es/ecma262/#sec-symbol.prototype.description\n'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar has = require('../internals/has');\nvar isObject = require('../internals/is-object');\nvar defineProperty = require('../internals/object-define-property').f;\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\n\nvar NativeSymbol = global.Symbol;\n\nif (DESCRIPTORS && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||\n // Safari 12 bug\n NativeSymbol().description !== undefined\n)) {\n var EmptyStringDescriptionStore = {};\n // wrap Symbol constructor for correct work with undefined description\n var SymbolWrapper = function Symbol() {\n var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);\n var result = this instanceof SymbolWrapper\n ? new NativeSymbol(description)\n // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'\n : description === undefined ? NativeSymbol() : NativeSymbol(description);\n if (description === '') EmptyStringDescriptionStore[result] = true;\n return result;\n };\n copyConstructorProperties(SymbolWrapper, NativeSymbol);\n var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;\n symbolPrototype.constructor = SymbolWrapper;\n\n var symbolToString = symbolPrototype.toString;\n var native = String(NativeSymbol('test')) == 'Symbol(test)';\n var regexp = /^Symbol\\((.*)\\)[^)]+$/;\n defineProperty(symbolPrototype, 'description', {\n configurable: true,\n get: function description() {\n var symbol = isObject(this) ? this.valueOf() : this;\n var string = symbolToString.call(symbol);\n if (has(EmptyStringDescriptionStore, symbol)) return '';\n var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');\n return desc === '' ? undefined : desc;\n }\n });\n\n $({ global: true, forced: true }, {\n Symbol: SymbolWrapper\n });\n}\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.iterator` well-known symbol\n// https://tc39.es/ecma262/#sec-symbol.iterator\ndefineWellKnownSymbol('iterator');\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar getBuiltIn = require('../internals/get-built-in');\nvar IS_PURE = require('../internals/is-pure');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\nvar USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');\nvar fails = require('../internals/fails');\nvar has = require('../internals/has');\nvar isArray = require('../internals/is-array');\nvar isObject = require('../internals/is-object');\nvar anObject = require('../internals/an-object');\nvar toObject = require('../internals/to-object');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar nativeObjectCreate = require('../internals/object-create');\nvar objectKeys = require('../internals/object-keys');\nvar getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');\nvar getOwnPropertyNamesExternal = require('../internals/object-get-own-property-names-external');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar definePropertyModule = require('../internals/object-define-property');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar shared = require('../internals/shared');\nvar sharedKey = require('../internals/shared-key');\nvar hiddenKeys = require('../internals/hidden-keys');\nvar uid = require('../internals/uid');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');\nvar defineWellKnownSymbol = require('../internals/define-well-known-symbol');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar InternalStateModule = require('../internals/internal-state');\nvar $forEach = require('../internals/array-iteration').forEach;\n\nvar HIDDEN = sharedKey('hidden');\nvar SYMBOL = 'Symbol';\nvar PROTOTYPE = 'prototype';\nvar TO_PRIMITIVE = wellKnownSymbol('toPrimitive');\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(SYMBOL);\nvar ObjectPrototype = Object[PROTOTYPE];\nvar $Symbol = global.Symbol;\nvar $stringify = getBuiltIn('JSON', 'stringify');\nvar nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\nvar nativeDefineProperty = definePropertyModule.f;\nvar nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;\nvar nativePropertyIsEnumerable = propertyIsEnumerableModule.f;\nvar AllSymbols = shared('symbols');\nvar ObjectPrototypeSymbols = shared('op-symbols');\nvar StringToSymbolRegistry = shared('string-to-symbol-registry');\nvar SymbolToStringRegistry = shared('symbol-to-string-registry');\nvar WellKnownSymbolsStore = shared('wks');\nvar QObject = global.QObject;\n// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173\nvar USE_SETTER = !QObject || !QObject[PROTOTYPE] || !QObject[PROTOTYPE].findChild;\n\n// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687\nvar setSymbolDescriptor = DESCRIPTORS && fails(function () {\n return nativeObjectCreate(nativeDefineProperty({}, 'a', {\n get: function () { return nativeDefineProperty(this, 'a', { value: 7 }).a; }\n })).a != 7;\n}) ? function (O, P, Attributes) {\n var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor(ObjectPrototype, P);\n if (ObjectPrototypeDescriptor) delete ObjectPrototype[P];\n nativeDefineProperty(O, P, Attributes);\n if (ObjectPrototypeDescriptor && O !== ObjectPrototype) {\n nativeDefineProperty(ObjectPrototype, P, ObjectPrototypeDescriptor);\n }\n} : nativeDefineProperty;\n\nvar wrap = function (tag, description) {\n var symbol = AllSymbols[tag] = nativeObjectCreate($Symbol[PROTOTYPE]);\n setInternalState(symbol, {\n type: SYMBOL,\n tag: tag,\n description: description\n });\n if (!DESCRIPTORS) symbol.description = description;\n return symbol;\n};\n\nvar isSymbol = USE_SYMBOL_AS_UID ? function (it) {\n return typeof it == 'symbol';\n} : function (it) {\n return Object(it) instanceof $Symbol;\n};\n\nvar $defineProperty = function defineProperty(O, P, Attributes) {\n if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes);\n anObject(O);\n var key = toPrimitive(P, true);\n anObject(Attributes);\n if (has(AllSymbols, key)) {\n if (!Attributes.enumerable) {\n if (!has(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {}));\n O[HIDDEN][key] = true;\n } else {\n if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;\n Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });\n } return setSymbolDescriptor(O, key, Attributes);\n } return nativeDefineProperty(O, key, Attributes);\n};\n\nvar $defineProperties = function defineProperties(O, Properties) {\n anObject(O);\n var properties = toIndexedObject(Properties);\n var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));\n $forEach(keys, function (key) {\n if (!DESCRIPTORS || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);\n });\n return O;\n};\n\nvar $create = function create(O, Properties) {\n return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);\n};\n\nvar $propertyIsEnumerable = function propertyIsEnumerable(V) {\n var P = toPrimitive(V, true);\n var enumerable = nativePropertyIsEnumerable.call(this, P);\n if (this === ObjectPrototype && has(AllSymbols, P) && !has(ObjectPrototypeSymbols, P)) return false;\n return enumerable || !has(this, P) || !has(AllSymbols, P) || has(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;\n};\n\nvar $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {\n var it = toIndexedObject(O);\n var key = toPrimitive(P, true);\n if (it === ObjectPrototype && has(AllSymbols, key) && !has(ObjectPrototypeSymbols, key)) return;\n var descriptor = nativeGetOwnPropertyDescriptor(it, key);\n if (descriptor && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) {\n descriptor.enumerable = true;\n }\n return descriptor;\n};\n\nvar $getOwnPropertyNames = function getOwnPropertyNames(O) {\n var names = nativeGetOwnPropertyNames(toIndexedObject(O));\n var result = [];\n $forEach(names, function (key) {\n if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);\n });\n return result;\n};\n\nvar $getOwnPropertySymbols = function getOwnPropertySymbols(O) {\n var IS_OBJECT_PROTOTYPE = O === ObjectPrototype;\n var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));\n var result = [];\n $forEach(names, function (key) {\n if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {\n result.push(AllSymbols[key]);\n }\n });\n return result;\n};\n\n// `Symbol` constructor\n// https://tc39.es/ecma262/#sec-symbol-constructor\nif (!NATIVE_SYMBOL) {\n $Symbol = function Symbol() {\n if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');\n var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);\n var tag = uid(description);\n var setter = function (value) {\n if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);\n if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;\n setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));\n };\n if (DESCRIPTORS && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });\n return wrap(tag, description);\n };\n\n redefine($Symbol[PROTOTYPE], 'toString', function toString() {\n return getInternalState(this).tag;\n });\n\n redefine($Symbol, 'withoutSetter', function (description) {\n return wrap(uid(description), description);\n });\n\n propertyIsEnumerableModule.f = $propertyIsEnumerable;\n definePropertyModule.f = $defineProperty;\n getOwnPropertyDescriptorModule.f = $getOwnPropertyDescriptor;\n getOwnPropertyNamesModule.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;\n getOwnPropertySymbolsModule.f = $getOwnPropertySymbols;\n\n wrappedWellKnownSymbolModule.f = function (name) {\n return wrap(wellKnownSymbol(name), name);\n };\n\n if (DESCRIPTORS) {\n // https://github.com/tc39/proposal-Symbol-description\n nativeDefineProperty($Symbol[PROTOTYPE], 'description', {\n configurable: true,\n get: function description() {\n return getInternalState(this).description;\n }\n });\n if (!IS_PURE) {\n redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });\n }\n }\n}\n\n$({ global: true, wrap: true, forced: !NATIVE_SYMBOL, sham: !NATIVE_SYMBOL }, {\n Symbol: $Symbol\n});\n\n$forEach(objectKeys(WellKnownSymbolsStore), function (name) {\n defineWellKnownSymbol(name);\n});\n\n$({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL }, {\n // `Symbol.for` method\n // https://tc39.es/ecma262/#sec-symbol.for\n 'for': function (key) {\n var string = String(key);\n if (has(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];\n var symbol = $Symbol(string);\n StringToSymbolRegistry[string] = symbol;\n SymbolToStringRegistry[symbol] = string;\n return symbol;\n },\n // `Symbol.keyFor` method\n // https://tc39.es/ecma262/#sec-symbol.keyfor\n keyFor: function keyFor(sym) {\n if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');\n if (has(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];\n },\n useSetter: function () { USE_SETTER = true; },\n useSimple: function () { USE_SETTER = false; }\n});\n\n$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL, sham: !DESCRIPTORS }, {\n // `Object.create` method\n // https://tc39.es/ecma262/#sec-object.create\n create: $create,\n // `Object.defineProperty` method\n // https://tc39.es/ecma262/#sec-object.defineproperty\n defineProperty: $defineProperty,\n // `Object.defineProperties` method\n // https://tc39.es/ecma262/#sec-object.defineproperties\n defineProperties: $defineProperties,\n // `Object.getOwnPropertyDescriptor` method\n // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors\n getOwnPropertyDescriptor: $getOwnPropertyDescriptor\n});\n\n$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL }, {\n // `Object.getOwnPropertyNames` method\n // https://tc39.es/ecma262/#sec-object.getownpropertynames\n getOwnPropertyNames: $getOwnPropertyNames,\n // `Object.getOwnPropertySymbols` method\n // https://tc39.es/ecma262/#sec-object.getownpropertysymbols\n getOwnPropertySymbols: $getOwnPropertySymbols\n});\n\n// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives\n// https://bugs.chromium.org/p/v8/issues/detail?id=3443\n$({ target: 'Object', stat: true, forced: fails(function () { getOwnPropertySymbolsModule.f(1); }) }, {\n getOwnPropertySymbols: function getOwnPropertySymbols(it) {\n return getOwnPropertySymbolsModule.f(toObject(it));\n }\n});\n\n// `JSON.stringify` method behavior with symbols\n// https://tc39.es/ecma262/#sec-json.stringify\nif ($stringify) {\n var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL || fails(function () {\n var symbol = $Symbol();\n // MS Edge converts symbol values to JSON as {}\n return $stringify([symbol]) != '[null]'\n // WebKit converts symbol values to JSON as null\n || $stringify({ a: symbol }) != '{}'\n // V8 throws on boxed symbols\n || $stringify(Object(symbol)) != '{}';\n });\n\n $({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {\n // eslint-disable-next-line no-unused-vars -- required for `.length`\n stringify: function stringify(it, replacer, space) {\n var args = [it];\n var index = 1;\n var $replacer;\n while (arguments.length > index) args.push(arguments[index++]);\n $replacer = replacer;\n if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined\n if (!isArray(replacer)) replacer = function (key, value) {\n if (typeof $replacer == 'function') value = $replacer.call(this, key, value);\n if (!isSymbol(value)) return value;\n };\n args[1] = replacer;\n return $stringify.apply(null, args);\n }\n });\n}\n\n// `Symbol.prototype[@@toPrimitive]` method\n// https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive\nif (!$Symbol[PROTOTYPE][TO_PRIMITIVE]) {\n createNonEnumerableProperty($Symbol[PROTOTYPE], TO_PRIMITIVE, $Symbol[PROTOTYPE].valueOf);\n}\n// `Symbol.prototype[@@toStringTag]` property\n// https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag\nsetToStringTag($Symbol, SYMBOL);\n\nhiddenKeys[HIDDEN] = true;\n","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar forEach = require('../internals/array-for-each');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nfor (var COLLECTION_NAME in DOMIterables) {\n var Collection = global[COLLECTION_NAME];\n var CollectionPrototype = Collection && Collection.prototype;\n // some Chrome versions have non-configurable methods on DOMTokenList\n if (CollectionPrototype && CollectionPrototype.forEach !== forEach) try {\n createNonEnumerableProperty(CollectionPrototype, 'forEach', forEach);\n } catch (error) {\n CollectionPrototype.forEach = forEach;\n }\n}\n","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar ArrayIteratorMethods = require('../modules/es.array.iterator');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar ArrayValues = ArrayIteratorMethods.values;\n\nfor (var COLLECTION_NAME in DOMIterables) {\n var Collection = global[COLLECTION_NAME];\n var CollectionPrototype = Collection && Collection.prototype;\n if (CollectionPrototype) {\n // some Chrome versions have non-configurable methods on DOMTokenList\n if (CollectionPrototype[ITERATOR] !== ArrayValues) try {\n createNonEnumerableProperty(CollectionPrototype, ITERATOR, ArrayValues);\n } catch (error) {\n CollectionPrototype[ITERATOR] = ArrayValues;\n }\n if (!CollectionPrototype[TO_STRING_TAG]) {\n createNonEnumerableProperty(CollectionPrototype, TO_STRING_TAG, COLLECTION_NAME);\n }\n if (DOMIterables[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {\n // some Chrome versions have non-configurable methods on DOMTokenList\n if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {\n createNonEnumerableProperty(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);\n } catch (error) {\n CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];\n }\n }\n }\n}\n","'use strict';\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nrequire('../modules/es.array.iterator');\nvar $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar USE_NATIVE_URL = require('../internals/native-url');\nvar redefine = require('../internals/redefine');\nvar redefineAll = require('../internals/redefine-all');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar InternalStateModule = require('../internals/internal-state');\nvar anInstance = require('../internals/an-instance');\nvar hasOwn = require('../internals/has');\nvar bind = require('../internals/function-bind-context');\nvar classof = require('../internals/classof');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar getIterator = require('../internals/get-iterator');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar $fetch = getBuiltIn('fetch');\nvar Headers = getBuiltIn('Headers');\nvar ITERATOR = wellKnownSymbol('iterator');\nvar URL_SEARCH_PARAMS = 'URLSearchParams';\nvar URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalParamsState = InternalStateModule.getterFor(URL_SEARCH_PARAMS);\nvar getInternalIteratorState = InternalStateModule.getterFor(URL_SEARCH_PARAMS_ITERATOR);\n\nvar plus = /\\+/g;\nvar sequences = Array(4);\n\nvar percentSequence = function (bytes) {\n return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\\\da-f]{2}){' + bytes + '})', 'gi'));\n};\n\nvar percentDecode = function (sequence) {\n try {\n return decodeURIComponent(sequence);\n } catch (error) {\n return sequence;\n }\n};\n\nvar deserialize = function (it) {\n var result = it.replace(plus, ' ');\n var bytes = 4;\n try {\n return decodeURIComponent(result);\n } catch (error) {\n while (bytes) {\n result = result.replace(percentSequence(bytes--), percentDecode);\n }\n return result;\n }\n};\n\nvar find = /[!'()~]|%20/g;\n\nvar replace = {\n '!': '%21',\n \"'\": '%27',\n '(': '%28',\n ')': '%29',\n '~': '%7E',\n '%20': '+'\n};\n\nvar replacer = function (match) {\n return replace[match];\n};\n\nvar serialize = function (it) {\n return encodeURIComponent(it).replace(find, replacer);\n};\n\nvar parseSearchParams = function (result, query) {\n if (query) {\n var attributes = query.split('&');\n var index = 0;\n var attribute, entry;\n while (index < attributes.length) {\n attribute = attributes[index++];\n if (attribute.length) {\n entry = attribute.split('=');\n result.push({\n key: deserialize(entry.shift()),\n value: deserialize(entry.join('='))\n });\n }\n }\n }\n};\n\nvar updateSearchParams = function (query) {\n this.entries.length = 0;\n parseSearchParams(this.entries, query);\n};\n\nvar validateArgumentsLength = function (passed, required) {\n if (passed < required) throw TypeError('Not enough arguments');\n};\n\nvar URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {\n setInternalState(this, {\n type: URL_SEARCH_PARAMS_ITERATOR,\n iterator: getIterator(getInternalParamsState(params).entries),\n kind: kind\n });\n}, 'Iterator', function next() {\n var state = getInternalIteratorState(this);\n var kind = state.kind;\n var step = state.iterator.next();\n var entry = step.value;\n if (!step.done) {\n step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];\n } return step;\n});\n\n// `URLSearchParams` constructor\n// https://url.spec.whatwg.org/#interface-urlsearchparams\nvar URLSearchParamsConstructor = function URLSearchParams(/* init */) {\n anInstance(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);\n var init = arguments.length > 0 ? arguments[0] : undefined;\n var that = this;\n var entries = [];\n var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;\n\n setInternalState(that, {\n type: URL_SEARCH_PARAMS,\n entries: entries,\n updateURL: function () { /* empty */ },\n updateSearchParams: updateSearchParams\n });\n\n if (init !== undefined) {\n if (isObject(init)) {\n iteratorMethod = getIteratorMethod(init);\n if (typeof iteratorMethod === 'function') {\n iterator = iteratorMethod.call(init);\n next = iterator.next;\n while (!(step = next.call(iterator)).done) {\n entryIterator = getIterator(anObject(step.value));\n entryNext = entryIterator.next;\n if (\n (first = entryNext.call(entryIterator)).done ||\n (second = entryNext.call(entryIterator)).done ||\n !entryNext.call(entryIterator).done\n ) throw TypeError('Expected sequence with length 2');\n entries.push({ key: first.value + '', value: second.value + '' });\n }\n } else for (key in init) if (hasOwn(init, key)) entries.push({ key: key, value: init[key] + '' });\n } else {\n parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');\n }\n }\n};\n\nvar URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;\n\nredefineAll(URLSearchParamsPrototype, {\n // `URLSearchParams.prototype.append` method\n // https://url.spec.whatwg.org/#dom-urlsearchparams-append\n append: function append(name, value) {\n validateArgumentsLength(arguments.length, 2);\n var state = getInternalParamsState(this);\n state.entries.push({ key: name + '', value: value + '' });\n state.updateURL();\n },\n // `URLSearchParams.prototype.delete` method\n // https://url.spec.whatwg.org/#dom-urlsearchparams-delete\n 'delete': function (name) {\n validateArgumentsLength(arguments.length, 1);\n var state = getInternalParamsState(this);\n var entries = state.entries;\n var key = name + '';\n var index = 0;\n while (index < entries.length) {\n if (entries[index].key === key) entries.splice(index, 1);\n else index++;\n }\n state.updateURL();\n },\n // `URLSearchParams.prototype.get` method\n // https://url.spec.whatwg.org/#dom-urlsearchparams-get\n get: function get(name) {\n validateArgumentsLength(arguments.length, 1);\n var entries = getInternalParamsState(this).entries;\n var key = name + '';\n var index = 0;\n for (; index < entries.length; index++) {\n if (entries[index].key === key) return entries[index].value;\n }\n return null;\n },\n // `URLSearchParams.prototype.getAll` method\n // https://url.spec.whatwg.org/#dom-urlsearchparams-getall\n getAll: function getAll(name) {\n validateArgumentsLength(arguments.length, 1);\n var entries = getInternalParamsState(this).entries;\n var key = name + '';\n var result = [];\n var index = 0;\n for (; index < entries.length; index++) {\n if (entries[index].key === key) result.push(entries[index].value);\n }\n return result;\n },\n // `URLSearchParams.prototype.has` method\n // https://url.spec.whatwg.org/#dom-urlsearchparams-has\n has: function has(name) {\n validateArgumentsLength(arguments.length, 1);\n var entries = getInternalParamsState(this).entries;\n var key = name + '';\n var index = 0;\n while (index < entries.length) {\n if (entries[index++].key === key) return true;\n }\n return false;\n },\n // `URLSearchParams.prototype.set` method\n // https://url.spec.whatwg.org/#dom-urlsearchparams-set\n set: function set(name, value) {\n validateArgumentsLength(arguments.length, 1);\n var state = getInternalParamsState(this);\n var entries = state.entries;\n var found = false;\n var key = name + '';\n var val = value + '';\n var index = 0;\n var entry;\n for (; index < entries.length; index++) {\n entry = entries[index];\n if (entry.key === key) {\n if (found) entries.splice(index--, 1);\n else {\n found = true;\n entry.value = val;\n }\n }\n }\n if (!found) entries.push({ key: key, value: val });\n state.updateURL();\n },\n // `URLSearchParams.prototype.sort` method\n // https://url.spec.whatwg.org/#dom-urlsearchparams-sort\n sort: function sort() {\n var state = getInternalParamsState(this);\n var entries = state.entries;\n // Array#sort is not stable in some engines\n var slice = entries.slice();\n var entry, entriesIndex, sliceIndex;\n entries.length = 0;\n for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {\n entry = slice[sliceIndex];\n for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {\n if (entries[entriesIndex].key > entry.key) {\n entries.splice(entriesIndex, 0, entry);\n break;\n }\n }\n if (entriesIndex === sliceIndex) entries.push(entry);\n }\n state.updateURL();\n },\n // `URLSearchParams.prototype.forEach` method\n forEach: function forEach(callback /* , thisArg */) {\n var entries = getInternalParamsState(this).entries;\n var boundFunction = bind(callback, arguments.length > 1 ? arguments[1] : undefined, 3);\n var index = 0;\n var entry;\n while (index < entries.length) {\n entry = entries[index++];\n boundFunction(entry.value, entry.key, this);\n }\n },\n // `URLSearchParams.prototype.keys` method\n keys: function keys() {\n return new URLSearchParamsIterator(this, 'keys');\n },\n // `URLSearchParams.prototype.values` method\n values: function values() {\n return new URLSearchParamsIterator(this, 'values');\n },\n // `URLSearchParams.prototype.entries` method\n entries: function entries() {\n return new URLSearchParamsIterator(this, 'entries');\n }\n}, { enumerable: true });\n\n// `URLSearchParams.prototype[@@iterator]` method\nredefine(URLSearchParamsPrototype, ITERATOR, URLSearchParamsPrototype.entries);\n\n// `URLSearchParams.prototype.toString` method\n// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior\nredefine(URLSearchParamsPrototype, 'toString', function toString() {\n var entries = getInternalParamsState(this).entries;\n var result = [];\n var index = 0;\n var entry;\n while (index < entries.length) {\n entry = entries[index++];\n result.push(serialize(entry.key) + '=' + serialize(entry.value));\n } return result.join('&');\n}, { enumerable: true });\n\nsetToStringTag(URLSearchParamsConstructor, URL_SEARCH_PARAMS);\n\n$({ global: true, forced: !USE_NATIVE_URL }, {\n URLSearchParams: URLSearchParamsConstructor\n});\n\n// Wrap `fetch` for correct work with polyfilled `URLSearchParams`\n// https://github.com/zloirock/core-js/issues/674\nif (!USE_NATIVE_URL && typeof $fetch == 'function' && typeof Headers == 'function') {\n $({ global: true, enumerable: true, forced: true }, {\n fetch: function fetch(input /* , init */) {\n var args = [input];\n var init, body, headers;\n if (arguments.length > 1) {\n init = arguments[1];\n if (isObject(init)) {\n body = init.body;\n if (classof(body) === URL_SEARCH_PARAMS) {\n headers = init.headers ? new Headers(init.headers) : new Headers();\n if (!headers.has('content-type')) {\n headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');\n }\n init = create(init, {\n body: createPropertyDescriptor(0, String(body)),\n headers: createPropertyDescriptor(0, headers)\n });\n }\n }\n args.push(init);\n } return $fetch.apply(this, args);\n }\n });\n}\n\nmodule.exports = {\n URLSearchParams: URLSearchParamsConstructor,\n getState: getInternalParamsState\n};\n","'use strict';\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nrequire('../modules/es.string.iterator');\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar USE_NATIVE_URL = require('../internals/native-url');\nvar global = require('../internals/global');\nvar defineProperties = require('../internals/object-define-properties');\nvar redefine = require('../internals/redefine');\nvar anInstance = require('../internals/an-instance');\nvar has = require('../internals/has');\nvar assign = require('../internals/object-assign');\nvar arrayFrom = require('../internals/array-from');\nvar codeAt = require('../internals/string-multibyte').codeAt;\nvar toASCII = require('../internals/string-punycode-to-ascii');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar URLSearchParamsModule = require('../modules/web.url-search-params');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar NativeURL = global.URL;\nvar URLSearchParams = URLSearchParamsModule.URLSearchParams;\nvar getInternalSearchParamsState = URLSearchParamsModule.getState;\nvar setInternalState = InternalStateModule.set;\nvar getInternalURLState = InternalStateModule.getterFor('URL');\nvar floor = Math.floor;\nvar pow = Math.pow;\n\nvar INVALID_AUTHORITY = 'Invalid authority';\nvar INVALID_SCHEME = 'Invalid scheme';\nvar INVALID_HOST = 'Invalid host';\nvar INVALID_PORT = 'Invalid port';\n\nvar ALPHA = /[A-Za-z]/;\n// eslint-disable-next-line regexp/no-obscure-range -- safe\nvar ALPHANUMERIC = /[\\d+-.A-Za-z]/;\nvar DIGIT = /\\d/;\nvar HEX_START = /^(0x|0X)/;\nvar OCT = /^[0-7]+$/;\nvar DEC = /^\\d+$/;\nvar HEX = /^[\\dA-Fa-f]+$/;\n/* eslint-disable no-control-regex -- safe */\nvar FORBIDDEN_HOST_CODE_POINT = /[\\0\\t\\n\\r #%/:?@[\\\\]]/;\nvar FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\\0\\t\\n\\r #/:?@[\\\\]]/;\nvar LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\\u0000-\\u001F ]+|[\\u0000-\\u001F ]+$/g;\nvar TAB_AND_NEW_LINE = /[\\t\\n\\r]/g;\n/* eslint-enable no-control-regex -- safe */\nvar EOF;\n\nvar parseHost = function (url, input) {\n var result, codePoints, index;\n if (input.charAt(0) == '[') {\n if (input.charAt(input.length - 1) != ']') return INVALID_HOST;\n result = parseIPv6(input.slice(1, -1));\n if (!result) return INVALID_HOST;\n url.host = result;\n // opaque host\n } else if (!isSpecial(url)) {\n if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;\n result = '';\n codePoints = arrayFrom(input);\n for (index = 0; index < codePoints.length; index++) {\n result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);\n }\n url.host = result;\n } else {\n input = toASCII(input);\n if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;\n result = parseIPv4(input);\n if (result === null) return INVALID_HOST;\n url.host = result;\n }\n};\n\nvar parseIPv4 = function (input) {\n var parts = input.split('.');\n var partsLength, numbers, index, part, radix, number, ipv4;\n if (parts.length && parts[parts.length - 1] == '') {\n parts.pop();\n }\n partsLength = parts.length;\n if (partsLength > 4) return input;\n numbers = [];\n for (index = 0; index < partsLength; index++) {\n part = parts[index];\n if (part == '') return input;\n radix = 10;\n if (part.length > 1 && part.charAt(0) == '0') {\n radix = HEX_START.test(part) ? 16 : 8;\n part = part.slice(radix == 8 ? 1 : 2);\n }\n if (part === '') {\n number = 0;\n } else {\n if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;\n number = parseInt(part, radix);\n }\n numbers.push(number);\n }\n for (index = 0; index < partsLength; index++) {\n number = numbers[index];\n if (index == partsLength - 1) {\n if (number >= pow(256, 5 - partsLength)) return null;\n } else if (number > 255) return null;\n }\n ipv4 = numbers.pop();\n for (index = 0; index < numbers.length; index++) {\n ipv4 += numbers[index] * pow(256, 3 - index);\n }\n return ipv4;\n};\n\n// eslint-disable-next-line max-statements -- TODO\nvar parseIPv6 = function (input) {\n var address = [0, 0, 0, 0, 0, 0, 0, 0];\n var pieceIndex = 0;\n var compress = null;\n var pointer = 0;\n var value, length, numbersSeen, ipv4Piece, number, swaps, swap;\n\n var char = function () {\n return input.charAt(pointer);\n };\n\n if (char() == ':') {\n if (input.charAt(1) != ':') return;\n pointer += 2;\n pieceIndex++;\n compress = pieceIndex;\n }\n while (char()) {\n if (pieceIndex == 8) return;\n if (char() == ':') {\n if (compress !== null) return;\n pointer++;\n pieceIndex++;\n compress = pieceIndex;\n continue;\n }\n value = length = 0;\n while (length < 4 && HEX.test(char())) {\n value = value * 16 + parseInt(char(), 16);\n pointer++;\n length++;\n }\n if (char() == '.') {\n if (length == 0) return;\n pointer -= length;\n if (pieceIndex > 6) return;\n numbersSeen = 0;\n while (char()) {\n ipv4Piece = null;\n if (numbersSeen > 0) {\n if (char() == '.' && numbersSeen < 4) pointer++;\n else return;\n }\n if (!DIGIT.test(char())) return;\n while (DIGIT.test(char())) {\n number = parseInt(char(), 10);\n if (ipv4Piece === null) ipv4Piece = number;\n else if (ipv4Piece == 0) return;\n else ipv4Piece = ipv4Piece * 10 + number;\n if (ipv4Piece > 255) return;\n pointer++;\n }\n address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;\n numbersSeen++;\n if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;\n }\n if (numbersSeen != 4) return;\n break;\n } else if (char() == ':') {\n pointer++;\n if (!char()) return;\n } else if (char()) return;\n address[pieceIndex++] = value;\n }\n if (compress !== null) {\n swaps = pieceIndex - compress;\n pieceIndex = 7;\n while (pieceIndex != 0 && swaps > 0) {\n swap = address[pieceIndex];\n address[pieceIndex--] = address[compress + swaps - 1];\n address[compress + --swaps] = swap;\n }\n } else if (pieceIndex != 8) return;\n return address;\n};\n\nvar findLongestZeroSequence = function (ipv6) {\n var maxIndex = null;\n var maxLength = 1;\n var currStart = null;\n var currLength = 0;\n var index = 0;\n for (; index < 8; index++) {\n if (ipv6[index] !== 0) {\n if (currLength > maxLength) {\n maxIndex = currStart;\n maxLength = currLength;\n }\n currStart = null;\n currLength = 0;\n } else {\n if (currStart === null) currStart = index;\n ++currLength;\n }\n }\n if (currLength > maxLength) {\n maxIndex = currStart;\n maxLength = currLength;\n }\n return maxIndex;\n};\n\nvar serializeHost = function (host) {\n var result, index, compress, ignore0;\n // ipv4\n if (typeof host == 'number') {\n result = [];\n for (index = 0; index < 4; index++) {\n result.unshift(host % 256);\n host = floor(host / 256);\n } return result.join('.');\n // ipv6\n } else if (typeof host == 'object') {\n result = '';\n compress = findLongestZeroSequence(host);\n for (index = 0; index < 8; index++) {\n if (ignore0 && host[index] === 0) continue;\n if (ignore0) ignore0 = false;\n if (compress === index) {\n result += index ? ':' : '::';\n ignore0 = true;\n } else {\n result += host[index].toString(16);\n if (index < 7) result += ':';\n }\n }\n return '[' + result + ']';\n } return host;\n};\n\nvar C0ControlPercentEncodeSet = {};\nvar fragmentPercentEncodeSet = assign({}, C0ControlPercentEncodeSet, {\n ' ': 1, '\"': 1, '<': 1, '>': 1, '`': 1\n});\nvar pathPercentEncodeSet = assign({}, fragmentPercentEncodeSet, {\n '#': 1, '?': 1, '{': 1, '}': 1\n});\nvar userinfoPercentEncodeSet = assign({}, pathPercentEncodeSet, {\n '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\\\': 1, ']': 1, '^': 1, '|': 1\n});\n\nvar percentEncode = function (char, set) {\n var code = codeAt(char, 0);\n return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);\n};\n\nvar specialSchemes = {\n ftp: 21,\n file: null,\n http: 80,\n https: 443,\n ws: 80,\n wss: 443\n};\n\nvar isSpecial = function (url) {\n return has(specialSchemes, url.scheme);\n};\n\nvar includesCredentials = function (url) {\n return url.username != '' || url.password != '';\n};\n\nvar cannotHaveUsernamePasswordPort = function (url) {\n return !url.host || url.cannotBeABaseURL || url.scheme == 'file';\n};\n\nvar isWindowsDriveLetter = function (string, normalized) {\n var second;\n return string.length == 2 && ALPHA.test(string.charAt(0))\n && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));\n};\n\nvar startsWithWindowsDriveLetter = function (string) {\n var third;\n return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (\n string.length == 2 ||\n ((third = string.charAt(2)) === '/' || third === '\\\\' || third === '?' || third === '#')\n );\n};\n\nvar shortenURLsPath = function (url) {\n var path = url.path;\n var pathSize = path.length;\n if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {\n path.pop();\n }\n};\n\nvar isSingleDot = function (segment) {\n return segment === '.' || segment.toLowerCase() === '%2e';\n};\n\nvar isDoubleDot = function (segment) {\n segment = segment.toLowerCase();\n return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';\n};\n\n// States:\nvar SCHEME_START = {};\nvar SCHEME = {};\nvar NO_SCHEME = {};\nvar SPECIAL_RELATIVE_OR_AUTHORITY = {};\nvar PATH_OR_AUTHORITY = {};\nvar RELATIVE = {};\nvar RELATIVE_SLASH = {};\nvar SPECIAL_AUTHORITY_SLASHES = {};\nvar SPECIAL_AUTHORITY_IGNORE_SLASHES = {};\nvar AUTHORITY = {};\nvar HOST = {};\nvar HOSTNAME = {};\nvar PORT = {};\nvar FILE = {};\nvar FILE_SLASH = {};\nvar FILE_HOST = {};\nvar PATH_START = {};\nvar PATH = {};\nvar CANNOT_BE_A_BASE_URL_PATH = {};\nvar QUERY = {};\nvar FRAGMENT = {};\n\n// eslint-disable-next-line max-statements -- TODO\nvar parseURL = function (url, input, stateOverride, base) {\n var state = stateOverride || SCHEME_START;\n var pointer = 0;\n var buffer = '';\n var seenAt = false;\n var seenBracket = false;\n var seenPasswordToken = false;\n var codePoints, char, bufferCodePoints, failure;\n\n if (!stateOverride) {\n url.scheme = '';\n url.username = '';\n url.password = '';\n url.host = null;\n url.port = null;\n url.path = [];\n url.query = null;\n url.fragment = null;\n url.cannotBeABaseURL = false;\n input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');\n }\n\n input = input.replace(TAB_AND_NEW_LINE, '');\n\n codePoints = arrayFrom(input);\n\n while (pointer <= codePoints.length) {\n char = codePoints[pointer];\n switch (state) {\n case SCHEME_START:\n if (char && ALPHA.test(char)) {\n buffer += char.toLowerCase();\n state = SCHEME;\n } else if (!stateOverride) {\n state = NO_SCHEME;\n continue;\n } else return INVALID_SCHEME;\n break;\n\n case SCHEME:\n if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {\n buffer += char.toLowerCase();\n } else if (char == ':') {\n if (stateOverride && (\n (isSpecial(url) != has(specialSchemes, buffer)) ||\n (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||\n (url.scheme == 'file' && !url.host)\n )) return;\n url.scheme = buffer;\n if (stateOverride) {\n if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;\n return;\n }\n buffer = '';\n if (url.scheme == 'file') {\n state = FILE;\n } else if (isSpecial(url) && base && base.scheme == url.scheme) {\n state = SPECIAL_RELATIVE_OR_AUTHORITY;\n } else if (isSpecial(url)) {\n state = SPECIAL_AUTHORITY_SLASHES;\n } else if (codePoints[pointer + 1] == '/') {\n state = PATH_OR_AUTHORITY;\n pointer++;\n } else {\n url.cannotBeABaseURL = true;\n url.path.push('');\n state = CANNOT_BE_A_BASE_URL_PATH;\n }\n } else if (!stateOverride) {\n buffer = '';\n state = NO_SCHEME;\n pointer = 0;\n continue;\n } else return INVALID_SCHEME;\n break;\n\n case NO_SCHEME:\n if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;\n if (base.cannotBeABaseURL && char == '#') {\n url.scheme = base.scheme;\n url.path = base.path.slice();\n url.query = base.query;\n url.fragment = '';\n url.cannotBeABaseURL = true;\n state = FRAGMENT;\n break;\n }\n state = base.scheme == 'file' ? FILE : RELATIVE;\n continue;\n\n case SPECIAL_RELATIVE_OR_AUTHORITY:\n if (char == '/' && codePoints[pointer + 1] == '/') {\n state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n pointer++;\n } else {\n state = RELATIVE;\n continue;\n } break;\n\n case PATH_OR_AUTHORITY:\n if (char == '/') {\n state = AUTHORITY;\n break;\n } else {\n state = PATH;\n continue;\n }\n\n case RELATIVE:\n url.scheme = base.scheme;\n if (char == EOF) {\n url.username = base.username;\n url.password = base.password;\n url.host = base.host;\n url.port = base.port;\n url.path = base.path.slice();\n url.query = base.query;\n } else if (char == '/' || (char == '\\\\' && isSpecial(url))) {\n state = RELATIVE_SLASH;\n } else if (char == '?') {\n url.username = base.username;\n url.password = base.password;\n url.host = base.host;\n url.port = base.port;\n url.path = base.path.slice();\n url.query = '';\n state = QUERY;\n } else if (char == '#') {\n url.username = base.username;\n url.password = base.password;\n url.host = base.host;\n url.port = base.port;\n url.path = base.path.slice();\n url.query = base.query;\n url.fragment = '';\n state = FRAGMENT;\n } else {\n url.username = base.username;\n url.password = base.password;\n url.host = base.host;\n url.port = base.port;\n url.path = base.path.slice();\n url.path.pop();\n state = PATH;\n continue;\n } break;\n\n case RELATIVE_SLASH:\n if (isSpecial(url) && (char == '/' || char == '\\\\')) {\n state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n } else if (char == '/') {\n state = AUTHORITY;\n } else {\n url.username = base.username;\n url.password = base.password;\n url.host = base.host;\n url.port = base.port;\n state = PATH;\n continue;\n } break;\n\n case SPECIAL_AUTHORITY_SLASHES:\n state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;\n pointer++;\n break;\n\n case SPECIAL_AUTHORITY_IGNORE_SLASHES:\n if (char != '/' && char != '\\\\') {\n state = AUTHORITY;\n continue;\n } break;\n\n case AUTHORITY:\n if (char == '@') {\n if (seenAt) buffer = '%40' + buffer;\n seenAt = true;\n bufferCodePoints = arrayFrom(buffer);\n for (var i = 0; i < bufferCodePoints.length; i++) {\n var codePoint = bufferCodePoints[i];\n if (codePoint == ':' && !seenPasswordToken) {\n seenPasswordToken = true;\n continue;\n }\n var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);\n if (seenPasswordToken) url.password += encodedCodePoints;\n else url.username += encodedCodePoints;\n }\n buffer = '';\n } else if (\n char == EOF || char == '/' || char == '?' || char == '#' ||\n (char == '\\\\' && isSpecial(url))\n ) {\n if (seenAt && buffer == '') return INVALID_AUTHORITY;\n pointer -= arrayFrom(buffer).length + 1;\n buffer = '';\n state = HOST;\n } else buffer += char;\n break;\n\n case HOST:\n case HOSTNAME:\n if (stateOverride && url.scheme == 'file') {\n state = FILE_HOST;\n continue;\n } else if (char == ':' && !seenBracket) {\n if (buffer == '') return INVALID_HOST;\n failure = parseHost(url, buffer);\n if (failure) return failure;\n buffer = '';\n state = PORT;\n if (stateOverride == HOSTNAME) return;\n } else if (\n char == EOF || char == '/' || char == '?' || char == '#' ||\n (char == '\\\\' && isSpecial(url))\n ) {\n if (isSpecial(url) && buffer == '') return INVALID_HOST;\n if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;\n failure = parseHost(url, buffer);\n if (failure) return failure;\n buffer = '';\n state = PATH_START;\n if (stateOverride) return;\n continue;\n } else {\n if (char == '[') seenBracket = true;\n else if (char == ']') seenBracket = false;\n buffer += char;\n } break;\n\n case PORT:\n if (DIGIT.test(char)) {\n buffer += char;\n } else if (\n char == EOF || char == '/' || char == '?' || char == '#' ||\n (char == '\\\\' && isSpecial(url)) ||\n stateOverride\n ) {\n if (buffer != '') {\n var port = parseInt(buffer, 10);\n if (port > 0xFFFF) return INVALID_PORT;\n url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;\n buffer = '';\n }\n if (stateOverride) return;\n state = PATH_START;\n continue;\n } else return INVALID_PORT;\n break;\n\n case FILE:\n url.scheme = 'file';\n if (char == '/' || char == '\\\\') state = FILE_SLASH;\n else if (base && base.scheme == 'file') {\n if (char == EOF) {\n url.host = base.host;\n url.path = base.path.slice();\n url.query = base.query;\n } else if (char == '?') {\n url.host = base.host;\n url.path = base.path.slice();\n url.query = '';\n state = QUERY;\n } else if (char == '#') {\n url.host = base.host;\n url.path = base.path.slice();\n url.query = base.query;\n url.fragment = '';\n state = FRAGMENT;\n } else {\n if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {\n url.host = base.host;\n url.path = base.path.slice();\n shortenURLsPath(url);\n }\n state = PATH;\n continue;\n }\n } else {\n state = PATH;\n continue;\n } break;\n\n case FILE_SLASH:\n if (char == '/' || char == '\\\\') {\n state = FILE_HOST;\n break;\n }\n if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {\n if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);\n else url.host = base.host;\n }\n state = PATH;\n continue;\n\n case FILE_HOST:\n if (char == EOF || char == '/' || char == '\\\\' || char == '?' || char == '#') {\n if (!stateOverride && isWindowsDriveLetter(buffer)) {\n state = PATH;\n } else if (buffer == '') {\n url.host = '';\n if (stateOverride) return;\n state = PATH_START;\n } else {\n failure = parseHost(url, buffer);\n if (failure) return failure;\n if (url.host == 'localhost') url.host = '';\n if (stateOverride) return;\n buffer = '';\n state = PATH_START;\n } continue;\n } else buffer += char;\n break;\n\n case PATH_START:\n if (isSpecial(url)) {\n state = PATH;\n if (char != '/' && char != '\\\\') continue;\n } else if (!stateOverride && char == '?') {\n url.query = '';\n state = QUERY;\n } else if (!stateOverride && char == '#') {\n url.fragment = '';\n state = FRAGMENT;\n } else if (char != EOF) {\n state = PATH;\n if (char != '/') continue;\n } break;\n\n case PATH:\n if (\n char == EOF || char == '/' ||\n (char == '\\\\' && isSpecial(url)) ||\n (!stateOverride && (char == '?' || char == '#'))\n ) {\n if (isDoubleDot(buffer)) {\n shortenURLsPath(url);\n if (char != '/' && !(char == '\\\\' && isSpecial(url))) {\n url.path.push('');\n }\n } else if (isSingleDot(buffer)) {\n if (char != '/' && !(char == '\\\\' && isSpecial(url))) {\n url.path.push('');\n }\n } else {\n if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {\n if (url.host) url.host = '';\n buffer = buffer.charAt(0) + ':'; // normalize windows drive letter\n }\n url.path.push(buffer);\n }\n buffer = '';\n if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {\n while (url.path.length > 1 && url.path[0] === '') {\n url.path.shift();\n }\n }\n if (char == '?') {\n url.query = '';\n state = QUERY;\n } else if (char == '#') {\n url.fragment = '';\n state = FRAGMENT;\n }\n } else {\n buffer += percentEncode(char, pathPercentEncodeSet);\n } break;\n\n case CANNOT_BE_A_BASE_URL_PATH:\n if (char == '?') {\n url.query = '';\n state = QUERY;\n } else if (char == '#') {\n url.fragment = '';\n state = FRAGMENT;\n } else if (char != EOF) {\n url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);\n } break;\n\n case QUERY:\n if (!stateOverride && char == '#') {\n url.fragment = '';\n state = FRAGMENT;\n } else if (char != EOF) {\n if (char == \"'\" && isSpecial(url)) url.query += '%27';\n else if (char == '#') url.query += '%23';\n else url.query += percentEncode(char, C0ControlPercentEncodeSet);\n } break;\n\n case FRAGMENT:\n if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);\n break;\n }\n\n pointer++;\n }\n};\n\n// `URL` constructor\n// https://url.spec.whatwg.org/#url-class\nvar URLConstructor = function URL(url /* , base */) {\n var that = anInstance(this, URLConstructor, 'URL');\n var base = arguments.length > 1 ? arguments[1] : undefined;\n var urlString = String(url);\n var state = setInternalState(that, { type: 'URL' });\n var baseState, failure;\n if (base !== undefined) {\n if (base instanceof URLConstructor) baseState = getInternalURLState(base);\n else {\n failure = parseURL(baseState = {}, String(base));\n if (failure) throw TypeError(failure);\n }\n }\n failure = parseURL(state, urlString, null, baseState);\n if (failure) throw TypeError(failure);\n var searchParams = state.searchParams = new URLSearchParams();\n var searchParamsState = getInternalSearchParamsState(searchParams);\n searchParamsState.updateSearchParams(state.query);\n searchParamsState.updateURL = function () {\n state.query = String(searchParams) || null;\n };\n if (!DESCRIPTORS) {\n that.href = serializeURL.call(that);\n that.origin = getOrigin.call(that);\n that.protocol = getProtocol.call(that);\n that.username = getUsername.call(that);\n that.password = getPassword.call(that);\n that.host = getHost.call(that);\n that.hostname = getHostname.call(that);\n that.port = getPort.call(that);\n that.pathname = getPathname.call(that);\n that.search = getSearch.call(that);\n that.searchParams = getSearchParams.call(that);\n that.hash = getHash.call(that);\n }\n};\n\nvar URLPrototype = URLConstructor.prototype;\n\nvar serializeURL = function () {\n var url = getInternalURLState(this);\n var scheme = url.scheme;\n var username = url.username;\n var password = url.password;\n var host = url.host;\n var port = url.port;\n var path = url.path;\n var query = url.query;\n var fragment = url.fragment;\n var output = scheme + ':';\n if (host !== null) {\n output += '//';\n if (includesCredentials(url)) {\n output += username + (password ? ':' + password : '') + '@';\n }\n output += serializeHost(host);\n if (port !== null) output += ':' + port;\n } else if (scheme == 'file') output += '//';\n output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';\n if (query !== null) output += '?' + query;\n if (fragment !== null) output += '#' + fragment;\n return output;\n};\n\nvar getOrigin = function () {\n var url = getInternalURLState(this);\n var scheme = url.scheme;\n var port = url.port;\n if (scheme == 'blob') try {\n return new URLConstructor(scheme.path[0]).origin;\n } catch (error) {\n return 'null';\n }\n if (scheme == 'file' || !isSpecial(url)) return 'null';\n return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');\n};\n\nvar getProtocol = function () {\n return getInternalURLState(this).scheme + ':';\n};\n\nvar getUsername = function () {\n return getInternalURLState(this).username;\n};\n\nvar getPassword = function () {\n return getInternalURLState(this).password;\n};\n\nvar getHost = function () {\n var url = getInternalURLState(this);\n var host = url.host;\n var port = url.port;\n return host === null ? ''\n : port === null ? serializeHost(host)\n : serializeHost(host) + ':' + port;\n};\n\nvar getHostname = function () {\n var host = getInternalURLState(this).host;\n return host === null ? '' : serializeHost(host);\n};\n\nvar getPort = function () {\n var port = getInternalURLState(this).port;\n return port === null ? '' : String(port);\n};\n\nvar getPathname = function () {\n var url = getInternalURLState(this);\n var path = url.path;\n return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';\n};\n\nvar getSearch = function () {\n var query = getInternalURLState(this).query;\n return query ? '?' + query : '';\n};\n\nvar getSearchParams = function () {\n return getInternalURLState(this).searchParams;\n};\n\nvar getHash = function () {\n var fragment = getInternalURLState(this).fragment;\n return fragment ? '#' + fragment : '';\n};\n\nvar accessorDescriptor = function (getter, setter) {\n return { get: getter, set: setter, configurable: true, enumerable: true };\n};\n\nif (DESCRIPTORS) {\n defineProperties(URLPrototype, {\n // `URL.prototype.href` accessors pair\n // https://url.spec.whatwg.org/#dom-url-href\n href: accessorDescriptor(serializeURL, function (href) {\n var url = getInternalURLState(this);\n var urlString = String(href);\n var failure = parseURL(url, urlString);\n if (failure) throw TypeError(failure);\n getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);\n }),\n // `URL.prototype.origin` getter\n // https://url.spec.whatwg.org/#dom-url-origin\n origin: accessorDescriptor(getOrigin),\n // `URL.prototype.protocol` accessors pair\n // https://url.spec.whatwg.org/#dom-url-protocol\n protocol: accessorDescriptor(getProtocol, function (protocol) {\n var url = getInternalURLState(this);\n parseURL(url, String(protocol) + ':', SCHEME_START);\n }),\n // `URL.prototype.username` accessors pair\n // https://url.spec.whatwg.org/#dom-url-username\n username: accessorDescriptor(getUsername, function (username) {\n var url = getInternalURLState(this);\n var codePoints = arrayFrom(String(username));\n if (cannotHaveUsernamePasswordPort(url)) return;\n url.username = '';\n for (var i = 0; i < codePoints.length; i++) {\n url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);\n }\n }),\n // `URL.prototype.password` accessors pair\n // https://url.spec.whatwg.org/#dom-url-password\n password: accessorDescriptor(getPassword, function (password) {\n var url = getInternalURLState(this);\n var codePoints = arrayFrom(String(password));\n if (cannotHaveUsernamePasswordPort(url)) return;\n url.password = '';\n for (var i = 0; i < codePoints.length; i++) {\n url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);\n }\n }),\n // `URL.prototype.host` accessors pair\n // https://url.spec.whatwg.org/#dom-url-host\n host: accessorDescriptor(getHost, function (host) {\n var url = getInternalURLState(this);\n if (url.cannotBeABaseURL) return;\n parseURL(url, String(host), HOST);\n }),\n // `URL.prototype.hostname` accessors pair\n // https://url.spec.whatwg.org/#dom-url-hostname\n hostname: accessorDescriptor(getHostname, function (hostname) {\n var url = getInternalURLState(this);\n if (url.cannotBeABaseURL) return;\n parseURL(url, String(hostname), HOSTNAME);\n }),\n // `URL.prototype.port` accessors pair\n // https://url.spec.whatwg.org/#dom-url-port\n port: accessorDescriptor(getPort, function (port) {\n var url = getInternalURLState(this);\n if (cannotHaveUsernamePasswordPort(url)) return;\n port = String(port);\n if (port == '') url.port = null;\n else parseURL(url, port, PORT);\n }),\n // `URL.prototype.pathname` accessors pair\n // https://url.spec.whatwg.org/#dom-url-pathname\n pathname: accessorDescriptor(getPathname, function (pathname) {\n var url = getInternalURLState(this);\n if (url.cannotBeABaseURL) return;\n url.path = [];\n parseURL(url, pathname + '', PATH_START);\n }),\n // `URL.prototype.search` accessors pair\n // https://url.spec.whatwg.org/#dom-url-search\n search: accessorDescriptor(getSearch, function (search) {\n var url = getInternalURLState(this);\n search = String(search);\n if (search == '') {\n url.query = null;\n } else {\n if ('?' == search.charAt(0)) search = search.slice(1);\n url.query = '';\n parseURL(url, search, QUERY);\n }\n getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);\n }),\n // `URL.prototype.searchParams` getter\n // https://url.spec.whatwg.org/#dom-url-searchparams\n searchParams: accessorDescriptor(getSearchParams),\n // `URL.prototype.hash` accessors pair\n // https://url.spec.whatwg.org/#dom-url-hash\n hash: accessorDescriptor(getHash, function (hash) {\n var url = getInternalURLState(this);\n hash = String(hash);\n if (hash == '') {\n url.fragment = null;\n return;\n }\n if ('#' == hash.charAt(0)) hash = hash.slice(1);\n url.fragment = '';\n parseURL(url, hash, FRAGMENT);\n })\n });\n}\n\n// `URL.prototype.toJSON` method\n// https://url.spec.whatwg.org/#dom-url-tojson\nredefine(URLPrototype, 'toJSON', function toJSON() {\n return serializeURL.call(this);\n}, { enumerable: true });\n\n// `URL.prototype.toString` method\n// https://url.spec.whatwg.org/#URL-stringification-behavior\nredefine(URLPrototype, 'toString', function toString() {\n return serializeURL.call(this);\n}, { enumerable: true });\n\nif (NativeURL) {\n var nativeCreateObjectURL = NativeURL.createObjectURL;\n var nativeRevokeObjectURL = NativeURL.revokeObjectURL;\n // `URL.createObjectURL` method\n // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL\n // eslint-disable-next-line no-unused-vars -- required for `.length`\n if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', function createObjectURL(blob) {\n return nativeCreateObjectURL.apply(NativeURL, arguments);\n });\n // `URL.revokeObjectURL` method\n // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL\n // eslint-disable-next-line no-unused-vars -- required for `.length`\n if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {\n return nativeRevokeObjectURL.apply(NativeURL, arguments);\n });\n}\n\nsetToStringTag(URLConstructor, 'URL');\n\n$({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS }, {\n URL: URLConstructor\n});\n","/*!\n\tColorbox 1.6.4\n\tlicense: MIT\n\thttp://www.jacklmoore.com/colorbox\n*/\n(function ($, document, window) {\n\tvar\n\t// Default settings object.\n\t// See http://jacklmoore.com/colorbox for details.\n\tdefaults = {\n\t\t// data sources\n\t\thtml: false,\n\t\tphoto: false,\n\t\tiframe: false,\n\t\tinline: false,\n\n\t\t// behavior and appearance\n\t\ttransition: \"elastic\",\n\t\tspeed: 300,\n\t\tfadeOut: 300,\n\t\twidth: false,\n\t\tinitialWidth: \"600\",\n\t\tinnerWidth: false,\n\t\tmaxWidth: false,\n\t\theight: false,\n\t\tinitialHeight: \"450\",\n\t\tinnerHeight: false,\n\t\tmaxHeight: false,\n\t\tscalePhotos: true,\n\t\tscrolling: true,\n\t\topacity: 0.9,\n\t\tpreloading: true,\n\t\tclassName: false,\n\t\toverlayClose: true,\n\t\tescKey: true,\n\t\tarrowKey: true,\n\t\ttop: false,\n\t\tbottom: false,\n\t\tleft: false,\n\t\tright: false,\n\t\tfixed: false,\n\t\tdata: undefined,\n\t\tcloseButton: true,\n\t\tfastIframe: true,\n\t\topen: false,\n\t\treposition: true,\n\t\tloop: true,\n\t\tslideshow: false,\n\t\tslideshowAuto: true,\n\t\tslideshowSpeed: 2500,\n\t\tslideshowStart: \"start slideshow\",\n\t\tslideshowStop: \"stop slideshow\",\n\t\tphotoRegex: /\\.(gif|png|jp(e|g|eg)|bmp|ico|webp|jxr|svg)((#|\\?).*)?$/i,\n\n\t\t// alternate image paths for high-res displays\n\t\tretinaImage: false,\n\t\tretinaUrl: false,\n\t\tretinaSuffix: '@2x.$1',\n\n\t\t// internationalization\n\t\tcurrent: \"image {current} of {total}\",\n\t\tprevious: \"previous\",\n\t\tnext: \"next\",\n\t\tclose: \"close\",\n\t\txhrError: \"This content failed to load.\",\n\t\timgError: \"This image failed to load.\",\n\n\t\t// accessbility\n\t\treturnFocus: true,\n\t\ttrapFocus: true,\n\n\t\t// callbacks\n\t\tonOpen: false,\n\t\tonLoad: false,\n\t\tonComplete: false,\n\t\tonCleanup: false,\n\t\tonClosed: false,\n\n\t\trel: function() {\n\t\t\treturn this.rel;\n\t\t},\n\t\thref: function() {\n\t\t\t// using this.href would give the absolute url, when the href may have been inteded as a selector (e.g. '#container')\n\t\t\treturn $(this).attr('href');\n\t\t},\n\t\ttitle: function() {\n\t\t\treturn this.title;\n\t\t},\n\t\tcreateImg: function() {\n\t\t\tvar img = new Image();\n\t\t\tvar attrs = $(this).data('cbox-img-attrs');\n\n\t\t\tif (typeof attrs === 'object') {\n\t\t\t\t$.each(attrs, function(key, val){\n\t\t\t\t\timg[key] = val;\n\t\t\t\t});\n\t\t\t}\n\n\t\t\treturn img;\n\t\t},\n\t\tcreateIframe: function() {\n\t\t\tvar iframe = document.createElement('iframe');\n\t\t\tvar attrs = $(this).data('cbox-iframe-attrs');\n\n\t\t\tif (typeof attrs === 'object') {\n\t\t\t\t$.each(attrs, function(key, val){\n\t\t\t\t\tiframe[key] = val;\n\t\t\t\t});\n\t\t\t}\n\n\t\t\tif ('frameBorder' in iframe) {\n\t\t\t\tiframe.frameBorder = 0;\n\t\t\t}\n\t\t\tif ('allowTransparency' in iframe) {\n\t\t\t\tiframe.allowTransparency = \"true\";\n\t\t\t}\n\t\t\tiframe.name = (new Date()).getTime(); // give the iframe a unique name to prevent caching\n\t\t\tiframe.allowFullscreen = true;\n\n\t\t\treturn iframe;\n\t\t}\n\t},\n\n\t// Abstracting the HTML and event identifiers for easy rebranding\n\tcolorbox = 'colorbox',\n\tprefix = 'cbox',\n\tboxElement = prefix + 'Element',\n\n\t// Events\n\tevent_open = prefix + '_open',\n\tevent_load = prefix + '_load',\n\tevent_complete = prefix + '_complete',\n\tevent_cleanup = prefix + '_cleanup',\n\tevent_closed = prefix + '_closed',\n\tevent_purge = prefix + '_purge',\n\n\t// Cached jQuery Object Variables\n\t$overlay,\n\t$box,\n\t$wrap,\n\t$content,\n\t$topBorder,\n\t$leftBorder,\n\t$rightBorder,\n\t$bottomBorder,\n\t$related,\n\t$window,\n\t$loaded,\n\t$loadingBay,\n\t$loadingOverlay,\n\t$title,\n\t$current,\n\t$slideshow,\n\t$next,\n\t$prev,\n\t$close,\n\t$groupControls,\n\t$events = $(''), // $({}) would be prefered, but there is an issue with jQuery 1.4.2\n\n\t// Variables for cached values or use across multiple functions\n\tsettings,\n\tinterfaceHeight,\n\tinterfaceWidth,\n\tloadedHeight,\n\tloadedWidth,\n\tindex,\n\tphoto,\n\topen,\n\tactive,\n\tclosing,\n\tloadingTimer,\n\tpublicMethod,\n\tdiv = \"div\",\n\trequests = 0,\n\tpreviousCSS = {},\n\tinit;\n\n\t// ****************\n\t// HELPER FUNCTIONS\n\t// ****************\n\n\t// Convenience function for creating new jQuery objects\n\tfunction $tag(tag, id, css) {\n\t\tvar element = document.createElement(tag);\n\n\t\tif (id) {\n\t\t\telement.id = prefix + id;\n\t\t}\n\n\t\tif (css) {\n\t\t\telement.style.cssText = css;\n\t\t}\n\n\t\treturn $(element);\n\t}\n\n\t// Get the window height using innerHeight when available to avoid an issue with iOS\n\t// http://bugs.jquery.com/ticket/6724\n\tfunction winheight() {\n\t\treturn window.innerHeight ? window.innerHeight : $(window).height();\n\t}\n\n\tfunction Settings(element, options) {\n\t\tif (options !== Object(options)) {\n\t\t\toptions = {};\n\t\t}\n\n\t\tthis.cache = {};\n\t\tthis.el = element;\n\n\t\tthis.value = function(key) {\n\t\t\tvar dataAttr;\n\n\t\t\tif (this.cache[key] === undefined) {\n\t\t\t\tdataAttr = $(this.el).attr('data-cbox-'+key);\n\n\t\t\t\tif (dataAttr !== undefined) {\n\t\t\t\t\tthis.cache[key] = dataAttr;\n\t\t\t\t} else if (options[key] !== undefined) {\n\t\t\t\t\tthis.cache[key] = options[key];\n\t\t\t\t} else if (defaults[key] !== undefined) {\n\t\t\t\t\tthis.cache[key] = defaults[key];\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn this.cache[key];\n\t\t};\n\n\t\tthis.get = function(key) {\n\t\t\tvar value = this.value(key);\n\t\t\treturn $.isFunction(value) ? value.call(this.el, this) : value;\n\t\t};\n\t}\n\n\t// Determine the next and previous members in a group.\n\tfunction getIndex(increment) {\n\t\tvar\n\t\tmax = $related.length,\n\t\tnewIndex = (index + increment) % max;\n\n\t\treturn (newIndex < 0) ? max + newIndex : newIndex;\n\t}\n\n\t// Convert '%' and 'px' values to integers\n\tfunction setSize(size, dimension) {\n\t\treturn Math.round((/%/.test(size) ? ((dimension === 'x' ? $window.width() : winheight()) / 100) : 1) * parseInt(size, 10));\n\t}\n\n\t// Checks an href to see if it is a photo.\n\t// There is a force photo option (photo: true) for hrefs that cannot be matched by the regex.\n\tfunction isImage(settings, url) {\n\t\treturn settings.get('photo') || settings.get('photoRegex').test(url);\n\t}\n\n\tfunction retinaUrl(settings, url) {\n\t\treturn settings.get('retinaUrl') && window.devicePixelRatio > 1 ? url.replace(settings.get('photoRegex'), settings.get('retinaSuffix')) : url;\n\t}\n\n\tfunction trapFocus(e) {\n\t\tif ('contains' in $box[0] && !$box[0].contains(e.target) && e.target !== $overlay[0]) {\n\t\t\te.stopPropagation();\n\t\t\t$box.focus();\n\t\t}\n\t}\n\n\tfunction setClass(str) {\n\t\tif (setClass.str !== str) {\n\t\t\t$box.add($overlay).removeClass(setClass.str).addClass(str);\n\t\t\tsetClass.str = str;\n\t\t}\n\t}\n\n\tfunction getRelated(rel) {\n\t\tindex = 0;\n\n\t\tif (rel && rel !== false && rel !== 'nofollow') {\n\t\t\t$related = $('.' + boxElement).filter(function () {\n\t\t\t\tvar options = $.data(this, colorbox);\n\t\t\t\tvar settings = new Settings(this, options);\n\t\t\t\treturn (settings.get('rel') === rel);\n\t\t\t});\n\t\t\tindex = $related.index(settings.el);\n\n\t\t\t// Check direct calls to Colorbox.\n\t\t\tif (index === -1) {\n\t\t\t\t$related = $related.add(settings.el);\n\t\t\t\tindex = $related.length - 1;\n\t\t\t}\n\t\t} else {\n\t\t\t$related = $(settings.el);\n\t\t}\n\t}\n\n\tfunction trigger(event) {\n\t\t// for external use\n\t\t$(document).trigger(event);\n\t\t// for internal use\n\t\t$events.triggerHandler(event);\n\t}\n\n\tvar slideshow = (function(){\n\t\tvar active,\n\t\t\tclassName = prefix + \"Slideshow_\",\n\t\t\tclick = \"click.\" + prefix,\n\t\t\ttimeOut;\n\n\t\tfunction clear () {\n\t\t\tclearTimeout(timeOut);\n\t\t}\n\n\t\tfunction set() {\n\t\t\tif (settings.get('loop') || $related[index + 1]) {\n\t\t\t\tclear();\n\t\t\t\ttimeOut = setTimeout(publicMethod.next, settings.get('slideshowSpeed'));\n\t\t\t}\n\t\t}\n\n\t\tfunction start() {\n\t\t\t$slideshow\n\t\t\t\t.html(settings.get('slideshowStop'))\n\t\t\t\t.unbind(click)\n\t\t\t\t.one(click, stop);\n\n\t\t\t$events\n\t\t\t\t.bind(event_complete, set)\n\t\t\t\t.bind(event_load, clear);\n\n\t\t\t$box.removeClass(className + \"off\").addClass(className + \"on\");\n\t\t}\n\n\t\tfunction stop() {\n\t\t\tclear();\n\n\t\t\t$events\n\t\t\t\t.unbind(event_complete, set)\n\t\t\t\t.unbind(event_load, clear);\n\n\t\t\t$slideshow\n\t\t\t\t.html(settings.get('slideshowStart'))\n\t\t\t\t.unbind(click)\n\t\t\t\t.one(click, function () {\n\t\t\t\t\tpublicMethod.next();\n\t\t\t\t\tstart();\n\t\t\t\t});\n\n\t\t\t$box.removeClass(className + \"on\").addClass(className + \"off\");\n\t\t}\n\n\t\tfunction reset() {\n\t\t\tactive = false;\n\t\t\t$slideshow.hide();\n\t\t\tclear();\n\t\t\t$events\n\t\t\t\t.unbind(event_complete, set)\n\t\t\t\t.unbind(event_load, clear);\n\t\t\t$box.removeClass(className + \"off \" + className + \"on\");\n\t\t}\n\n\t\treturn function(){\n\t\t\tif (active) {\n\t\t\t\tif (!settings.get('slideshow')) {\n\t\t\t\t\t$events.unbind(event_cleanup, reset);\n\t\t\t\t\treset();\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tif (settings.get('slideshow') && $related[1]) {\n\t\t\t\t\tactive = true;\n\t\t\t\t\t$events.one(event_cleanup, reset);\n\t\t\t\t\tif (settings.get('slideshowAuto')) {\n\t\t\t\t\t\tstart();\n\t\t\t\t\t} else {\n\t\t\t\t\t\tstop();\n\t\t\t\t\t}\n\t\t\t\t\t$slideshow.show();\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\n\t}());\n\n\n\tfunction launch(element) {\n\t\tvar options;\n\n\t\tif (!closing) {\n\n\t\t\toptions = $(element).data(colorbox);\n\n\t\t\tsettings = new Settings(element, options);\n\n\t\t\tgetRelated(settings.get('rel'));\n\n\t\t\tif (!open) {\n\t\t\t\topen = active = true; // Prevents the page-change action from queuing up if the visitor holds down the left or right keys.\n\n\t\t\t\tsetClass(settings.get('className'));\n\n\t\t\t\t// Show colorbox so the sizes can be calculated in older versions of jQuery\n\t\t\t\t$box.css({visibility:'hidden', display:'block', opacity:''});\n\n\t\t\t\t$loaded = $tag(div, 'LoadedContent', 'width:0; height:0; overflow:hidden; visibility:hidden');\n\t\t\t\t$content.css({width:'', height:''}).append($loaded);\n\n\t\t\t\t// Cache values needed for size calculations\n\t\t\t\tinterfaceHeight = $topBorder.height() + $bottomBorder.height() + $content.outerHeight(true) - $content.height();\n\t\t\t\tinterfaceWidth = $leftBorder.width() + $rightBorder.width() + $content.outerWidth(true) - $content.width();\n\t\t\t\tloadedHeight = $loaded.outerHeight(true);\n\t\t\t\tloadedWidth = $loaded.outerWidth(true);\n\n\t\t\t\t// Opens inital empty Colorbox prior to content being loaded.\n\t\t\t\tvar initialWidth = setSize(settings.get('initialWidth'), 'x');\n\t\t\t\tvar initialHeight = setSize(settings.get('initialHeight'), 'y');\n\t\t\t\tvar maxWidth = settings.get('maxWidth');\n\t\t\t\tvar maxHeight = settings.get('maxHeight');\n\n\t\t\t\tsettings.w = Math.max((maxWidth !== false ? Math.min(initialWidth, setSize(maxWidth, 'x')) : initialWidth) - loadedWidth - interfaceWidth, 0);\n\t\t\t\tsettings.h = Math.max((maxHeight !== false ? Math.min(initialHeight, setSize(maxHeight, 'y')) : initialHeight) - loadedHeight - interfaceHeight, 0);\n\n\t\t\t\t$loaded.css({width:'', height:settings.h});\n\t\t\t\tpublicMethod.position();\n\n\t\t\t\ttrigger(event_open);\n\t\t\t\tsettings.get('onOpen');\n\n\t\t\t\t$groupControls.add($title).hide();\n\n\t\t\t\t$box.focus();\n\n\t\t\t\tif (settings.get('trapFocus')) {\n\t\t\t\t\t// Confine focus to the modal\n\t\t\t\t\t// Uses event capturing that is not supported in IE8-\n\t\t\t\t\tif (document.addEventListener) {\n\n\t\t\t\t\t\tdocument.addEventListener('focus', trapFocus, true);\n\n\t\t\t\t\t\t$events.one(event_closed, function () {\n\t\t\t\t\t\t\tdocument.removeEventListener('focus', trapFocus, true);\n\t\t\t\t\t\t});\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Return focus on closing\n\t\t\t\tif (settings.get('returnFocus')) {\n\t\t\t\t\t$events.one(event_closed, function () {\n\t\t\t\t\t\t$(settings.el).focus();\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tvar opacity = parseFloat(settings.get('opacity'));\n\t\t\t$overlay.css({\n\t\t\t\topacity: opacity === opacity ? opacity : '',\n\t\t\t\tcursor: settings.get('overlayClose') ? 'pointer' : '',\n\t\t\t\tvisibility: 'visible'\n\t\t\t}).show();\n\n\t\t\tif (settings.get('closeButton')) {\n\t\t\t\t$close.html(settings.get('close')).appendTo($content);\n\t\t\t} else {\n\t\t\t\t$close.appendTo(''); // replace with .detach() when dropping jQuery < 1.4\n\t\t\t}\n\n\t\t\tload();\n\t\t}\n\t}\n\n\t// Colorbox's markup needs to be added to the DOM prior to being called\n\t// so that the browser will go ahead and load the CSS background images.\n\tfunction appendHTML() {\n\t\tif (!$box) {\n\t\t\tinit = false;\n\t\t\t$window = $(window);\n\t\t\t$box = $tag(div).attr({\n\t\t\t\tid: colorbox,\n\t\t\t\t'class': $.support.opacity === false ? prefix + 'IE' : '', // class for optional IE8 & lower targeted CSS.\n\t\t\t\trole: 'dialog',\n\t\t\t\ttabindex: '-1'\n\t\t\t}).hide();\n\t\t\t$overlay = $tag(div, \"Overlay\").hide();\n\t\t\t$loadingOverlay = $([$tag(div, \"LoadingOverlay\")[0],$tag(div, \"LoadingGraphic\")[0]]);\n\t\t\t$wrap = $tag(div, \"Wrapper\");\n\t\t\t$content = $tag(div, \"Content\").append(\n\t\t\t\t$title = $tag(div, \"Title\"),\n\t\t\t\t$current = $tag(div, \"Current\"),\n\t\t\t\t$prev = $('
'),\n ]);\n\n $infoDiv\n .append($children, $footer)\n .addClass('wide');\n }\n\n /**\n * @return {number} (in pixels) of the toolbar height. 0 if no toolbar.\n */\n getToolBarHeight() {\n const { $BRtoolbar } = this.br.refs;\n if ($BRtoolbar && $BRtoolbar.css('display') === 'block') {\n return ($BRtoolbar.outerHeight() + parseInt($BRtoolbar.css('top')));\n } else {\n return 0;\n }\n }\n}\n\nexport function blankInfoDiv() {\n return $(`\n `);\n}\n\nexport function blankShareDiv() {\n return $(`\n
\n
`);\n}\n\n/**\n * Helper opens a popup window. On mobile it only opens a new tab. Used for share.\n * @param {string} href\n * @param {number} width\n * @param {number} height\n * @param {string} name\n */\nexport function createPopup(href, width, height, name) {\n // Fixes dual-screen position\n const dualScreenLeft = window.screenLeft != undefined ? window.screenLeft : screen.left;\n const dualScreenTop = window.screenTop != undefined ? window.screenTop : screen.top;\n\n const win_w = window.innerWidth || document.documentElement.clientWidth || screen.width;\n const win_h = window.innerHeight || document.documentElement.clientHeight || screen.height;\n\n const left = ((win_w / 2) - (width / 2)) + dualScreenLeft;\n const top = ((win_h / 2) - (height / 2)) + dualScreenTop;\n const opts = `status=1,width=${width},height=${height},top=${top},left=${left}`;\n\n window.open(href, name, opts);\n}\n","// @ts-check\nimport { DEFAULT_OPTIONS } from './options.js';\nimport { clamp } from './utils.js';\n/** @typedef {import('./options.js').PageData} PageData */\n/** @typedef {import('../BookReader.js').default} BookReader */\n\n// URI to display when a page is not viewable.\n// TODO Render configurable html for the user instead.\n// FIXME Don't reference files on archive.org\nconst UNVIEWABLE_PAGE_URI = '/bookreader/static/preview-default.png';\n\n/**\n * Contains information about the Book/Document independent of the way it is\n * being rendering. Nothing here should reference e.g. the mode, zoom, etc.\n * It's just information about the book and its pages (usually as specified\n * in the BookReader data option.)\n */\nexport class BookModel {\n /**\n * @param {BookReader} br\n */\n constructor(br) {\n this.br = br;\n this.reduceSet = br.reduceSet;\n this.ppi = br.options?.ppi ?? DEFAULT_OPTIONS.ppi;\n\n /** @type {{width: number, height: number}} memoize storage */\n this._medianPageSize = null;\n /** @deprecated @type {{width: number, height: number}} memoize storage */\n this._medianPageSizePixels = null;\n /** @type {[PageData[], number]} */\n this._getDataFlattenedCached = null;\n }\n\n /**\n * @deprecated Use getMedianPageSizeInches\n * Memoized\n * @return {{width: number, height: number}}\n */\n getMedianPageSize() {\n if (this._medianPageSizePixels) {\n return this._medianPageSizePixels;\n }\n\n // A little expensive but we just do it once\n const widths = [];\n const heights = [];\n for (let i = 0; i < this.getNumLeafs(); i++) {\n widths.push(this.getPageWidth(i));\n heights.push(this.getPageHeight(i));\n }\n\n widths.sort();\n heights.sort();\n this._medianPageSizePixels = {\n width: widths[Math.floor(widths.length / 2)],\n height: heights[Math.floor(heights.length / 2)]\n };\n return this._medianPageSizePixels;\n }\n\n /** Get median width/height of page in inches. Memoized for performance. */\n getMedianPageSizeInches() {\n if (this._medianPageSize) {\n return this._medianPageSize;\n }\n\n const widths = [];\n const heights = [];\n for (const page of this.pagesIterator()) {\n widths.push(page.widthInches);\n heights.push(page.heightInches);\n }\n\n widths.sort();\n heights.sort();\n\n this._medianPageSize = {\n width: widths[Math.floor(widths.length / 2)],\n height: heights[Math.floor(heights.length / 2)]\n };\n return this._medianPageSize;\n }\n\n /**\n * Returns the page width for the given index, or first or last page if out of range\n * @deprecated see getPageWidth\n * @param {PageIndex} index\n */\n _getPageWidth(index) {\n // Synthesize a page width for pages not actually present in book.\n // May or may not be the best approach.\n // If index is out of range we return the width of first or last page\n index = clamp(index, 0, this.getNumLeafs() - 1);\n return this.getPageWidth(index);\n }\n\n /**\n * Returns the page height for the given index, or first or last page if out of range\n * @deprecated see getPageHeight\n * @param {PageIndex} index\n */\n _getPageHeight(index) {\n const clampedIndex = clamp(index, 0, this.getNumLeafs() - 1);\n return this.getPageHeight(clampedIndex);\n }\n\n /**\n * Returns the *highest* index the given page number, or undefined\n * @param {PageNumString} pageNum\n * @return {PageIndex|undefined}\n */\n getPageIndex(pageNum) {\n const pageIndices = this.getPageIndices(pageNum);\n return pageIndices.length ? pageIndices[pageIndices.length - 1] : undefined;\n }\n\n /**\n * Returns an array (possibly empty) of the indices with the given page number\n * @param {PageNumString} pageNum\n * @return {PageIndex[]}\n */\n getPageIndices(pageNum) {\n const indices = [];\n\n // Check for special \"nXX\" page number\n if (pageNum.slice(0,1) == 'n') {\n try {\n const pageIntStr = pageNum.slice(1, pageNum.length);\n const pageIndex = parseInt(pageIntStr);\n indices.push(pageIndex);\n return indices;\n } catch (err) {\n // Do nothing... will run through page names and see if one matches\n }\n }\n\n for (let i = 0; i < this.getNumLeafs(); i++) {\n if (this.getPageNum(i) == pageNum) {\n indices.push(i);\n }\n }\n\n return indices;\n }\n\n /**\n * Returns the name of the page as it should be displayed in the user interface\n * @param {PageIndex} index\n * @return {string}\n */\n getPageName(index) {\n return 'Page ' + this.getPageNum(index);\n }\n\n /**\n * @return {number} the total number of leafs (like an array length)\n */\n getNumLeafs() {\n // For deprecated interface support, if numLeafs is set, use that.\n if (this.br.numLeafs !== undefined)\n return this.br.numLeafs;\n return this._getDataFlattened().length;\n }\n\n /**\n * @param {PageIndex} index\n * @return {Number|undefined}\n */\n getPageWidth(index) {\n return this.getPageProp(index, 'width');\n }\n\n /**\n * @param {PageIndex} index\n * @return {Number|undefined}\n */\n getPageHeight(index) {\n return this.getPageProp(index, 'height');\n }\n\n /**\n * @param {PageIndex} index\n * @param {number} reduce - not used in default implementation\n * @param {number} rotate - not used in default implementation\n * @return {string|undefined}\n */\n // eslint-disable-next-line no-unused-vars\n getPageURI(index, reduce, rotate) {\n return !this.getPageProp(index, 'viewable', true) ? UNVIEWABLE_PAGE_URI : this.getPageProp(index, 'uri');\n }\n\n /**\n * @param {PageIndex} index\n * @return {'L' | 'R'}\n */\n getPageSide(index) {\n return this.getPageProp(index, 'pageSide') || (index % 2 === 0 ? 'R' : 'L');\n }\n\n /**\n * @param {PageIndex} index\n * @return {PageNumString}\n */\n getPageNum(index) {\n const pageNum = this.getPageProp(index, 'pageNum');\n return pageNum === undefined ? `n${index}` : pageNum;\n }\n\n /**\n * Generalized property accessor.\n * @param {PageIndex} index\n * @param {keyof PageData} propName\n * @param {*} [fallbackValue] return if undefined\n * @return {*|undefined}\n */\n getPageProp(index, propName, fallbackValue = undefined) {\n return this._getDataProp(index, propName, fallbackValue);\n }\n\n /**\n * This function returns the left and right indices for the user-visible\n * spread that contains the given index.\n * @note Can return indices out of range of what's in the book.\n * @param {PageIndex} pindex\n * @return {[PageIndex, PageIndex]} eg [0, 1]\n */\n getSpreadIndices(pindex) {\n if (this.br.pageProgression == 'rl') {\n return this.getPageSide(pindex) == 'R' ? [pindex + 1, pindex] : [pindex, pindex - 1];\n } else {\n return this.getPageSide(pindex) == 'L' ? [pindex, pindex + 1] : [pindex - 1, pindex];\n }\n }\n\n /**\n * Single images in the Internet Archive scandata.xml metadata are (somewhat incorrectly)\n * given a \"leaf\" number. Some of these images from the scanning process should not\n * be displayed in the BookReader (for example colour calibration cards). Since some\n * of the scanned images will not be displayed in the BookReader (those marked with\n * addToAccessFormats false in the scandata.xml) leaf numbers and BookReader page\n * indexes are generally not the same. This function returns the BookReader page\n * index given a scanned leaf number.\n *\n * This function is used, for example, to map between search results (that use the\n * leaf numbers) and the displayed pages in the BookReader.\n * @param {LeafNum} leafNum\n * @return {PageIndex}\n */\n leafNumToIndex(leafNum) {\n const index = this._getDataFlattened()\n .findIndex(d => d.leafNum == leafNum);\n // If no match is found, fall back to the leafNum provide (leafNum == index)\n return index > -1 ? index : leafNum;\n }\n\n /**\n * Parses the pageString format\n * @param {PageString} pageString\n * @return {PageIndex|undefined}\n */\n parsePageString(pageString) {\n let pageIndex;\n // Check for special \"leaf\"\n const leafMatch = /^leaf(\\d+)/.exec(pageString);\n if (leafMatch) {\n pageIndex = this.leafNumToIndex(parseInt(leafMatch[1], 10));\n if (pageIndex === null) {\n pageIndex = undefined; // to match return type of getPageIndex\n }\n } else {\n pageIndex = this.getPageIndex(pageString);\n }\n return pageIndex;\n }\n\n /**\n * @param {number} index use negatives to get page relative to end\n * @param loop whether to loop (i.e. -1 == last page)\n */\n getPage(index, loop = true) {\n const numLeafs = this.getNumLeafs();\n if (!loop && (index < 0 || index >= numLeafs)) {\n return undefined;\n }\n if (index < 0 && index >= -numLeafs) {\n index += numLeafs;\n }\n index = index % numLeafs;\n return new PageModel(this, index);\n }\n\n /**\n * @param {object} [arg0]\n * @param {number} [arg0.start] inclusive\n * @param {number} [arg0.end] exclusive\n * @param {boolean} [arg0.combineConsecutiveUnviewables] Yield only first unviewable\n * of a chunk of unviewable pages instead of each page\n */\n * pagesIterator({ start = 0, end = Infinity, combineConsecutiveUnviewables = false } = {}) {\n start = Math.max(0, start);\n end = Math.min(end, this.getNumLeafs());\n\n for (let i = start; i < end; i++) {\n const page = this.getPage(i);\n if (combineConsecutiveUnviewables && page.isConsecutiveUnviewable) continue;\n\n yield page;\n }\n }\n\n /**\n * Flatten the nested structure (make 1d array), and also add pageSide prop\n * @return {PageData[]}\n */\n _getDataFlattened() {\n if (this._getDataFlattenedCached && this._getDataFlattenedCached[1] === this.br.data.length)\n return this._getDataFlattenedCached[0];\n\n let prevPageSide = null;\n /** @type {number|null} */\n let unviewablesChunkStart = null;\n let index = 0;\n // @ts-ignore TS doesn't know about flatMap for some reason\n const flattened = this.br.data.flatMap(spread => {\n return spread.map(page => {\n if (!page.pageSide) {\n if (prevPageSide === null) {\n page.pageSide = spread.length === 2 ? 'L' : 'R';\n } else {\n page.pageSide = prevPageSide === 'L' ? 'R' : 'L';\n }\n }\n prevPageSide = page.pageSide;\n\n if (page.viewable === false) {\n if (unviewablesChunkStart === null) {\n page.unviewablesStart = unviewablesChunkStart = index;\n } else {\n page.unviewablesStart = unviewablesChunkStart;\n }\n } else {\n unviewablesChunkStart = null;\n }\n\n index++;\n return page;\n });\n });\n\n // length is used as a cache breaker\n this._getDataFlattenedCached = [flattened, this.br.data.length];\n return flattened;\n }\n\n /**\n * Helper. Return a prop for a given index. Returns `fallbackValue` if index is invalid or\n * property not on page.\n * @param {PageIndex} index\n * @param {keyof PageData} prop\n * @param {*} fallbackValue return if property not on the record\n * @return {*}\n */\n _getDataProp(index, prop, fallbackValue = undefined) {\n const dataf = this._getDataFlattened();\n const invalidIndex = isNaN(index) || index < 0 || index >= dataf.length;\n if (invalidIndex || 'undefined' == typeof(dataf[index][prop]))\n return fallbackValue;\n return dataf[index][prop];\n }\n}\n\n/**\n * A controlled schema for page data.\n */\nexport class PageModel {\n /**\n * @param {BookModel} book\n * @param {PageIndex} index\n */\n constructor(book, index) {\n // TODO: Get default from config\n this.ppi = book._getDataProp(index, 'ppi', book.ppi);\n this.book = book;\n this.index = index;\n this.width = book.getPageWidth(index);\n this.widthInches = this.width / this.ppi;\n this.height = book.getPageHeight(index);\n this.heightInches = this.height / this.ppi;\n this.pageSide = book.getPageSide(index);\n this.leafNum = book._getDataProp(index, 'leafNum', this.index);\n\n /** @type {boolean} */\n this.isViewable = book._getDataProp(index, 'viewable', true);\n /** @type {PageIndex} The first in the series of unviewable pages this is in. */\n this.unviewablesStart = book._getDataProp(index, 'unviewablesStart') || null;\n /**\n * Consecutive unviewable pages are pages in an unviewable \"chunk\" which are not the first\n * of that chunk.\n */\n this.isConsecutiveUnviewable = !this.isViewable && this.unviewablesStart != this.index;\n\n this._rawData = this.book._getDataFlattened()[this.index];\n }\n\n /**\n * Updates the page to no longer be unviewable. Assumes the\n * Page's URI is already set/correct.\n */\n makeViewable(newViewableState = true) {\n if (this.isViewable == newViewableState) return;\n\n if (newViewableState) {\n this._rawData.viewable = true;\n delete this._rawData.unviewablesStart;\n // Update any subsequent page to now point to the right \"start\"\n for (const page of this.book.pagesIterator({ start: this.index + 1 })) {\n if (page.isViewable) break;\n page._rawData.unviewablesStart = this.index + 1;\n }\n } else {\n this._rawData.viewable = false;\n this._rawData.unviewablesStart = (this.prev && !this.prev.isViewable) ? this.prev.unviewablesStart : this.index;\n // Update any subsequent page to now point to the right \"start\"\n for (const page of this.book.pagesIterator({ start: this.index + 1 })) {\n if (!page.isViewable) break;\n page._rawData.unviewablesStart = this._rawData.unviewablesStart;\n }\n }\n }\n\n get prev() {\n return this.findPrev();\n }\n\n get next() {\n return this.findNext();\n }\n\n /**\n * @param {number} reduce\n * @param {number} rotate\n */\n getURI(reduce, rotate) {\n return this.book.getPageURI(this.index, reduce, rotate);\n }\n\n /**\n * Returns the srcset with correct URIs or void string if out of range\n * @param {number} reduce\n * @param {number} [rotate]\n */\n getURISrcSet(reduce, rotate = 0) {\n const { reduceSet } = this.book;\n const initialReduce = reduceSet.floor(reduce);\n // We don't need to repeat the initial reduce in the srcset\n const topReduce = reduceSet.decr(initialReduce);\n const reduces = [];\n for (let r = topReduce; r >= 1; r = reduceSet.decr(r)) {\n reduces.push(r);\n }\n return reduces\n .map(r => `${this.getURI(r, rotate)} ${initialReduce / r}x`)\n .join(', ');\n }\n\n /**\n * @param {object} [arg0]\n * @param {boolean} [arg0.combineConsecutiveUnviewables] Whether to only yield the first page\n * of a series of unviewable pages instead of each page\n * @return {PageModel|void}\n */\n findNext({ combineConsecutiveUnviewables = false } = {}) {\n return this.book\n .pagesIterator({ start: this.index + 1, combineConsecutiveUnviewables })\n .next().value;\n }\n\n /**\n * @param {object} [arg0]\n * @param {boolean} [arg0.combineConsecutiveUnviewables] Whether to only yield the first page\n * of a series of unviewable pages instead of each page\n * @return {PageModel|void}\n */\n findPrev({ combineConsecutiveUnviewables = false } = {}) {\n if (this.index == 0) return undefined;\n\n if (combineConsecutiveUnviewables) {\n if (this.isConsecutiveUnviewable) {\n return this.book.getPage(this.unviewablesStart);\n } else {\n // Recursively goes backward through the book\n // TODO make a reverse iterator to make it look identical to findNext\n const prev = new PageModel(this.book, this.index - 1);\n return prev.isViewable ? prev : prev.findPrev({ combineConsecutiveUnviewables });\n }\n } else {\n return new PageModel(this.book, this.index - 1);\n }\n }\n}\n\n// There are a few main ways we can reference a specific page in a book:\n/**\n * @typedef {string} PageNumString\n * Possible values: /^n?\\d+$/. Example: 'n7', '18'\n * Not necessarily unique\n */\n/**\n * @typedef {number} LeafNum\n * No clue if 0 or 1 indexed or consecutive; generally from IA book info.\n */\n/**\n * @typedef {string} PageString\n * Possible values: /^(leaf)?\\d+$/ Example: 'leaf7', '18'\n * If leaf-prefixed, then the number is a LeafNum. Otherwise it's a PageNumString\n */\n/** @typedef {number} PageIndex 0-based index of all the pages */\n","// @ts-check\nimport { calcScreenDPI, notInArray } from '../BookReader/utils.js';\n/** @typedef {import('../BookReader.js').default} BookReader */\n/** @typedef {import('./BookModel.js').BookModel} BookModel */\n/** @typedef {import('./BookModel.js').PageIndex} PageIndex */\n\nexport class Mode1Up {\n /**\n * @param {BookReader} br\n * @param {BookModel} bookModel\n */\n constructor(br, bookModel) {\n this.br = br;\n this.book = bookModel;\n\n /** @private */\n this.$documentContainer = $('');\n /** @private */\n this.screenDPI = calcScreenDPI();\n /** @private */\n this.LEAF_SPACING_IN = 0.2;\n\n /**\n * How much smaller the picture on screen is than the real-world item\n *\n * Mode1Up doesn't use the br.reduce because it is DPI aware. The reduction factor\n * of a given leaf can change (since leaves can have different DPIs), but the real-world\n * reduction is constant throughout.\n */\n this.realWorldReduce = 1;\n }\n\n /** @private */\n get $scrollContainer() { return this.br.refs.$brContainer; }\n\n /**\n * This is called when we switch to one page view\n */\n prepare() {\n const startLeaf = this.br.currentIndex();\n\n this.$scrollContainer\n .empty()\n .css({ overflowX: 'auto', overflowY: 'scroll' })\n .append(this.$documentContainer);\n\n // Attaches to first child - child must be present\n this.$scrollContainer.dragscrollable();\n this.br.bindGestures(this.$scrollContainer);\n\n // This calls drawLeafs\n this.resizePageView();\n\n this.br.jumpToIndex(startLeaf);\n this.br.updateBrClasses();\n }\n\n /**\n * Get the number of pixels required to display the given inches with the given reduce\n * @param {number} inches\n * @param reduce Reduction factor currently at play\n * @param screenDPI The DPI of the screen\n **/\n physicalInchesToDisplayPixels(inches, reduce = this.realWorldReduce, screenDPI = this.screenDPI) {\n return inches * screenDPI / reduce;\n }\n\n /**\n * Iterate over pages, augmented with their top/bottom bounds\n * @param reduce Reduction factor currently at play\n * @param pageSpacing Inches of space to place between pages\n **/\n * pagesWithBounds(reduce = this.realWorldReduce, pageSpacing = this.LEAF_SPACING_IN) {\n let leafTop = 0;\n let leafBottom = 0;\n\n for (const page of this.book.pagesIterator({ combineConsecutiveUnviewables: true })) {\n const height = this.physicalInchesToDisplayPixels(page.heightInches, reduce);\n leafBottom += height;\n yield { page, top: leafTop, bottom: leafBottom };\n leafTop += height + this.physicalInchesToDisplayPixels(pageSpacing, reduce);\n leafBottom += this.physicalInchesToDisplayPixels(pageSpacing, reduce);\n }\n }\n\n /**\n * How much do the two bounds intersection?\n * @param {{ top: number; bottom: number; }} bound1\n * @param {{ top: number; bottom: number; }} bound2\n * @returns {number}\n */\n static boundIntersection(bound1, bound2) {\n const intersect = (bound1.bottom >= bound2.top) && (bound1.top <= bound2.bottom);\n if (!intersect) return 0;\n\n const boundingBox = {\n top: Math.min(bound1.top, bound2.top),\n bottom: Math.max(bound1.bottom, bound2.bottom),\n };\n const intersection = {\n top: Math.max(bound1.top, bound2.top),\n bottom: Math.min(bound1.bottom, bound2.bottom),\n };\n return (intersection.bottom - intersection.top) / (boundingBox.bottom - boundingBox.top);\n }\n\n /**\n * Find the pages that intersect the current viewport, including 1 before/after\n **/\n * findIntersectingPages() {\n // Rectangle of interest\n const height = this.$scrollContainer.height();\n const scrollTop = this.$scrollContainer.scrollTop();\n const scrollBottom = scrollTop + height;\n const scrollRegion = { top: scrollTop, bottom: scrollBottom };\n\n let prev = null;\n for (const {page, top, bottom} of this.pagesWithBounds()) {\n const intersection = Mode1Up.boundIntersection({ top, bottom }, scrollRegion);\n const cur = {page, top, bottom, intersection: intersection};\n if (intersection) {\n // Also yield the page just before the visible page\n if (prev && !prev.intersection) yield prev;\n yield cur;\n }\n // Also yield the page just after the last visible page\n else if (!cur.intersection && prev?.intersection) {\n yield cur;\n break;\n }\n prev = cur;\n }\n }\n\n drawLeafs() {\n const pagesToDisplay = Array.from(this.findIntersectingPages());\n\n if (pagesToDisplay.length) {\n const documentContainerWidth = this.$documentContainer.width();\n\n // The first page that's reasonably in view we set to the current index\n const firstProperPage = (\n pagesToDisplay.find(({intersection}) => intersection > 0.33) ||\n pagesToDisplay[0]\n ).page;\n this.br.updateFirstIndex(firstProperPage.index);\n\n for (const {page, top, bottom} of pagesToDisplay) {\n if (!this.br.displayedIndices.includes(page.index)) {\n const height = bottom - top;\n const width = this.physicalInchesToDisplayPixels(page.widthInches);\n const reduce = page.width / width;\n\n const pageContainer = this.br._createPageContainer(page.index)\n .update({\n dimensions: {\n width,\n height,\n top,\n left: Math.floor((documentContainerWidth - width) / 2),\n },\n reduce,\n });\n pageContainer.$container.appendTo(this.$documentContainer);\n }\n }\n }\n\n // Remove any pages we no longer need\n const displayedIndices = pagesToDisplay.map(({page}) => page.index);\n for (const index of this.br.displayedIndices) {\n if (notInArray(index, displayedIndices)) {\n this.br.$(`.pagediv${index}`).remove();\n }\n }\n\n this.br.displayedIndices = displayedIndices;\n if (this.br.enableSearch) this.br.updateSearchHilites();\n\n this.br.updateToolbarZoom(this.realWorldReduce);\n\n // Update the slider\n this.br.updateNavIndexThrottled();\n }\n\n /**\n * @param {PageIndex} index\n * @param {number} [pageX] x position on the page (in pixels) to center on\n * @param {number} [pageY] y position on the page (in pixels) to center on\n * @param {boolean} [noAnimate]\n */\n jumpToIndex(index, pageX, pageY, noAnimate) {\n const prevCurrentIndex = this.br.currentIndex();\n const { abs } = Math;\n let offset = 0;\n let leafTop = this.getPageTop(index);\n let leafLeft = 0;\n\n if (pageY) {\n const page = this.book.getPage(index);\n const clientHeight = this.$scrollContainer.prop('clientHeight');\n offset = this.physicalInchesToDisplayPixels((pageY / page.height) * page.heightInches) - (clientHeight / 2);\n leafTop += offset;\n } else {\n // Show page just a little below the top\n leafTop -= this.br.padding / 2;\n }\n\n if (pageX) {\n const page = this.book.getPage(index);\n const clientWidth = this.$scrollContainer.prop('clientWidth');\n offset = this.physicalInchesToDisplayPixels((pageX / page.width) * page.widthInches) - (clientWidth / 2);\n leafLeft += offset;\n } else {\n // Preserve left position\n leafLeft = this.$scrollContainer.scrollLeft();\n }\n\n // Only animate for small distances\n if (!noAnimate && abs(prevCurrentIndex - index) <= 4) {\n this.animating = true;\n this.$scrollContainer.stop(true).animate({\n scrollTop: leafTop,\n scrollLeft: leafLeft,\n }, 'fast', () => { this.animating = false });\n } else {\n this.$scrollContainer.stop(true).prop('scrollTop', leafTop);\n }\n }\n\n /**\n * @param {'in' | 'out'} direction\n */\n zoom(direction) {\n const nextReductionFactor = this.br.nextReduce(this.realWorldReduce, direction, this.br.onePage.reductionFactors);\n\n if (this.realWorldReduce == nextReductionFactor.reduce) {\n // Already at this level\n return;\n }\n\n this.realWorldReduce = nextReductionFactor.reduce;\n this.br.onePage.autofit = nextReductionFactor.autofit;\n\n this.resizePageView();\n this.br.updateToolbarZoom(this.realWorldReduce);\n\n // Recalculate search hilites\n if (this.br.enableSearch) {\n this.br.removeSearchHilites();\n this.br.updateSearchHilites();\n }\n }\n\n /**\n * Returns the reduce factor which has the pages fill the width of the viewport.\n */\n getAutofitWidth() {\n const widthPadding = 20;\n const availableWidth = this.$scrollContainer.prop('clientWidth') - 2 * widthPadding;\n\n const medianWidthInches = this.book.getMedianPageSizeInches().width;\n const medianPageWidth = this.physicalInchesToDisplayPixels(medianWidthInches, 1);\n return medianPageWidth / availableWidth;\n }\n\n getAutofitHeight() {\n // make sure a little of adjacent pages show\n const availableHeight = this.$scrollContainer.innerHeight() - 2 * this.br.padding;\n const medianHeightInches = this.book.getMedianPageSizeInches().height;\n const medianPageHeight = this.physicalInchesToDisplayPixels(medianHeightInches, 1);\n\n return medianPageHeight / availableHeight;\n }\n\n /**\n * Returns where the top of the page with given index should be in one page view\n * @param {PageIndex} index\n * @return {number}\n */\n getPageTop(index) {\n for (const {page, top} of this.pagesWithBounds()) {\n if (page.index == index) return top;\n }\n }\n\n /**\n * Update the reduction factors for 1up mode given the available width and height.\n * Recalculates the autofit reduction factors.\n */\n calculateReductionFactors() {\n this.br.onePage.reductionFactors = this.br.reductionFactors.concat(\n [\n { reduce: this.getAutofitWidth(), autofit: 'width' },\n { reduce: this.getAutofitHeight(), autofit: 'height' },\n ]);\n this.br.onePage.reductionFactors.sort(this.br._reduceSort);\n }\n\n /**\n * Resize the current one page view\n * Note this calls drawLeafs\n */\n resizePageView() {\n const viewWidth = this.$scrollContainer.prop('clientWidth');\n const oldScrollTop = this.$scrollContainer.prop('scrollTop');\n const oldPageViewHeight = this.$documentContainer.height();\n const oldPageViewWidth = this.$documentContainer.width();\n\n // May have come here after preparing the view, in which case the scrollTop and view height are not set\n\n let scrollRatio = 0;\n let oldCenterX;\n if (oldScrollTop > 0) {\n // We have scrolled - implies view has been set up\n const oldCenterY = this.centerY();\n oldCenterX = this.centerX();\n scrollRatio = oldCenterY / oldPageViewHeight;\n } else {\n // Have not scrolled, e.g. because in new container\n\n // We set the scroll ratio so that the current index will still be considered the\n // current index in drawLeafsOnePage after we create the new view container\n\n // Make sure this will count as current page after resize\n const fudgeFactor = 0.6 * this.physicalInchesToDisplayPixels(this.book.getPage(this.br.currentIndex()).heightInches);\n const oldLeafTop = this.getPageTop(this.br.currentIndex()) + fudgeFactor;\n const oldViewDimensions = this.calculateViewDimensions();\n scrollRatio = oldLeafTop / oldViewDimensions.height;\n }\n\n // Recalculate 1up reduction factors\n this.calculateReductionFactors();\n // Update current reduce (if in autofit)\n if (this.br.onePage.autofit) {\n const reductionFactor = this.br.nextReduce(this.realWorldReduce, this.br.onePage.autofit, this.br.onePage.reductionFactors);\n this.realWorldReduce = reductionFactor.reduce;\n }\n\n const viewDimensions = this.calculateViewDimensions();\n this.$documentContainer.height(viewDimensions.height);\n this.$documentContainer.width(viewDimensions.width);\n\n // Remove all pages\n this.$documentContainer.empty();\n this.br.displayedIndices = [];\n\n // Scroll to the right spot\n const newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);\n const newCenterY = scrollRatio * viewDimensions.height;\n const sizeX = this.$scrollContainer.prop('clientWidth'); // Use clientWidth because of scroll bar\n const sizeY = this.$scrollContainer.height();\n this.$scrollContainer.prop({\n scrollLeft: Math.max(0, newCenterX - sizeX / 2),\n scrollTop: Math.max(0, newCenterY - sizeY / 2),\n });\n\n // Draw all visible pages\n this.drawLeafs();\n\n if (this.br.enableSearch) {\n this.br.removeSearchHilites();\n this.br.updateSearchHilites();\n }\n }\n\n /**\n * Calculate the total width/height in pixels of the document container\n * @param {number} reduce\n * @param {number} leafSpacing spacing between pages in inches\n */\n calculateViewDimensions(reduce = this.realWorldReduce, leafSpacing = this.LEAF_SPACING_IN) {\n let width = 0;\n let height = 0;\n for (const {page, bottom} of this.pagesWithBounds(reduce, leafSpacing)) {\n const pageWidth = this.physicalInchesToDisplayPixels(page.widthInches, reduce);\n width = Math.max(width, pageWidth);\n height = bottom;\n }\n return { width, height };\n }\n\n /**\n * Returns the current offset of the viewport center in scaled document coordinates.\n */\n centerX($scrollContainer = this.$scrollContainer, $documentContainer = this.$documentContainer) {\n let centerX;\n if ($documentContainer.width() < $scrollContainer.prop('clientWidth')) { // fully shown\n centerX = $documentContainer.width();\n } else {\n centerX = $scrollContainer.scrollLeft() + $scrollContainer.prop('clientWidth') / 2;\n }\n return Math.floor(centerX);\n }\n\n /**\n * Returns the current offset of the viewport center in scaled document coordinates.\n */\n centerY($scrollContainer = this.$scrollContainer) {\n const centerY = $scrollContainer.scrollTop() + $scrollContainer.height() / 2;\n return Math.floor(centerY);\n }\n}\n","// @ts-check\n// effect.js gives acces to extra easing function (e.g. easeInSine)\nimport 'jquery-ui/ui/effect.js';\nimport '../dragscrollable-br.js';\nimport { clamp } from './utils.js';\nimport { EVENTS } from './events.js';\n\n/** @typedef {import('../BookReader.js').default} BookReader */\n/** @typedef {import('./BookModel.js').BookModel} BookModel */\n/** @typedef {import('./BookModel.js').PageIndex} PageIndex */\n/** @typedef {import('./options.js').BookReaderOptions} BookReaderOptions */\n/** @typedef {import('./PageContainer.js').PageContainer} PageContainer */\n\nexport class Mode2Up {\n /**\n * @param {BookReader} br\n * @param {BookModel} bookModel\n */\n constructor(br, bookModel) {\n this.br = br;\n this.book = bookModel;\n\n /** @type {HTMLDivElement} */\n this.leafEdgeL = null;\n /** @type {HTMLDivElement} */\n this.leafEdgeR = null;\n\n /** @type {{ [index: number]: PageContainer }} */\n this.pageContainers = {};\n }\n\n /**\n * @param {PageIndex} index\n */\n jumpToIndex(index) {\n // By checking against min/max we do nothing if requested index\n // is current\n if (index < Math.min(this.br.twoPage.currentIndexL, this.br.twoPage.currentIndexR)) {\n this.flipBackToIndex(index);\n } else if (index > Math.max(this.br.twoPage.currentIndexL, this.br.twoPage.currentIndexR)) {\n this.flipFwdToIndex(index);\n }\n }\n\n /**\n * @template T\n * @param {HTMLElement} element\n * @param {T} data\n * @param {function(HTMLElement, { data: T }): void} handler\n */\n setClickHandler(element, data, handler) {\n $(element).unbind('mouseup').bind('mouseup', data, function(e) {\n handler(this, e);\n });\n }\n\n /**\n * Draws book spread,\n * sets event handlers,\n * sets: `this.br.displayedIndices`\n * updates toolbar zoom\n * Important: `this.br.refs.$brTwoPageView` parent container must be emptied before calling\n */\n drawLeafs() {\n const $twoPageViewEl = this.br.refs.$brTwoPageView;\n const indexL = this.br.twoPage.currentIndexL;\n const indexR = this.br.twoPage.currentIndexR;\n\n this.createPageContainer(indexL).$container\n .css(this.leftLeafCss)\n .appendTo($twoPageViewEl);\n this.createPageContainer(indexR).$container\n .css(this.rightLeafCss)\n .appendTo($twoPageViewEl);\n\n this.displayedIndices = [this.br.twoPage.currentIndexL, this.br.twoPage.currentIndexR];\n this.setMouseHandlers();\n this.br.displayedIndices = this.displayedIndices;\n this.br.updateToolbarZoom(this.br.reduce);\n this.br.trigger('pageChanged');\n }\n\n /**\n * @param {1} direction\n */\n zoom(direction) {\n this.br.stopFlipAnimations();\n\n // Recalculate autofit factors\n this.calculateReductionFactors();\n\n // Get new zoom state\n const reductionFactor = this.br.nextReduce(this.br.reduce, direction, this.br.twoPage.reductionFactors);\n if ((this.br.reduce == reductionFactor.reduce) && (this.br.twoPage.autofit == reductionFactor.autofit)) {\n // Same zoom\n return;\n }\n this.br.twoPage.autofit = reductionFactor.autofit;\n this.br.reduce = reductionFactor.reduce;\n this.br.pageScale = this.br.reduce; // preserve current reduce\n\n // Preserve view center position\n const oldCenter = this.getViewCenter();\n\n // Prepare view with new center to minimize visual glitches\n const drawNewSpread = true;\n this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY, drawNewSpread);\n }\n\n /**\n * Resize spread containers, does not prefetch\n * uses `this.br.twoPage` properties\n */\n resizeSpread() {\n this.br.resizeBRcontainer(false); // no animation\n this.calculateSpreadSize();\n\n this.br.refs?.$brTwoPageView.css(this.mainContainerCss);\n this.centerView(); // let function self adjust\n\n $(this.br.twoPage.coverDiv).css(this.spreadCoverCss); // click sheath is memoized somehow\n const $spreadLayers = this.br.refs.$brTwoPageView;\n\n $spreadLayers.find('.BRleafEdgeR')?.css(this.leafEdgeRCss);\n $spreadLayers.find('.BRleafEdgeL')?.css(this.leafEdgeLCss);\n $spreadLayers.find('.BRgutter')?.css(this.spineCss);\n\n const indexL = this.br.twoPage.currentIndexL;\n const indexR = this.br.twoPage.currentIndexR;\n this.pageContainers[indexL].$container.css(this.leftLeafCss);\n this.pageContainers[indexR].$container.css(this.rightLeafCss);\n }\n\n /**\n * @param {number} centerPercentageX\n * @param {number} centerPercentageY\n * @param {Boolean} drawNewSpread\n */\n prepareTwoPageView(centerPercentageX, centerPercentageY, drawNewSpread = false) {\n // Some decisions about two page view:\n //\n // Both pages will be displayed at the same height, even if they were different physical/scanned\n // sizes. This simplifies the animation (from a design as well as technical standpoint). We\n // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most \"normal\"\n // aspect ratio to determine the height.\n //\n // The two page view div is resized to keep the middle of the book in the middle of the div\n // even as the page sizes change. To e.g. keep the middle of the book in the middle of the BRcontent\n // div requires adjusting the offset of BRtwpageview and/or scrolling in BRcontent.\n const startingReduce = this.br.reduce;\n const startingIndices = this.br.displayedIndices;\n\n this.br.refs.$brContainer.empty();\n this.br.refs.$brContainer.css('overflow', 'auto');\n\n // We want to display two facing pages. We may be missing\n // one side of the spread because it is the first/last leaf,\n // foldouts, missing pages, etc\n\n const targetLeaf = clamp(this.br.firstIndex, this.br.firstDisplayableIndex(), this.br.lastDisplayableIndex());\n const currentSpreadIndices = this.book.getSpreadIndices(targetLeaf);\n this.br.twoPage.currentIndexL = currentSpreadIndices[0];\n this.br.twoPage.currentIndexR = currentSpreadIndices[1];\n\n this.calculateSpreadSize(); //sets this.br.reduce, twoPage.width, twoPage.height and others\n\n /* check if calculations have changed that warrant a new book draw */\n const sameReducer = startingReduce == this.br.reduce;\n const sameStart = startingIndices == this.br.displayedIndices;\n const hasNewDisplayPagesOrDimensions = !sameStart || (sameStart && !sameReducer);\n\n if (drawNewSpread || hasNewDisplayPagesOrDimensions) {\n this.prunePageContainers();\n this.prefetch();\n }\n\n // Add the two page view\n // $$$ Can we get everything set up and then append?\n const $twoPageViewEl = $('');\n this.br.refs.$brTwoPageView = $twoPageViewEl;\n this.br.refs.$brContainer.append($twoPageViewEl);\n\n // Attaches to first child, so must come after we add the page view\n this.br.refs.$brContainer.dragscrollable({preventDefault:true});\n this.br.bindGestures(this.br.refs.$brContainer);\n\n // $$$ calculate container size first\n this.br.refs?.$brTwoPageView.css(this.mainContainerCss);\n\n // This will trump the incoming coordinates\n // in order to center book when zooming out\n if (this.br.twoPage.totalWidth < this.br.refs.$brContainer.prop('clientWidth')) {\n centerPercentageX = 0.5;\n }\n if (this.br.twoPage.totalHeight < this.br.refs.$brContainer.prop('clientHeight')) {\n centerPercentageY = 0.5;\n }\n\n this.centerView(centerPercentageX, centerPercentageY);\n\n // then set\n this.br.twoPage.coverDiv = document.createElement('div');\n $(this.br.twoPage.coverDiv).attr('class', 'BRbookcover').css(this.spreadCoverCss).appendTo(this.br.refs.$brTwoPageView);\n\n this.leafEdgeR = document.createElement('div');\n this.leafEdgeR.className = 'BRleafEdgeR';\n $(this.leafEdgeR).css(this.leafEdgeRCss).appendTo(this.br.refs.$brTwoPageView);\n\n this.leafEdgeL = document.createElement('div');\n this.leafEdgeL.className = 'BRleafEdgeL';\n $(this.leafEdgeL).css(this.leafEdgeLCss).appendTo(this.br.refs.$brTwoPageView);\n\n const div = document.createElement('div');\n $(div).attr('class', 'BRgutter').css(this.spineCss).appendTo(this.br.refs.$brTwoPageView);\n\n this.preparePopUp();\n\n this.br.displayedIndices = [];\n\n this.drawLeafs();\n this.br.updateToolbarZoom(this.br.reduce);\n\n if (this.br.enableSearch) {\n this.br.removeSearchHilites();\n this.br.updateSearchHilites();\n }\n\n this.br.updateBrClasses();\n }\n\n prunePageContainers() {\n for (const index in this.pageContainers) {\n if ((index != this.br.twoPage.currentIndexL) && (index != this.br.twoPage.currentIndexR)) {\n $(this.pageContainers[index].$container).remove();\n }\n if ((index < this.br.twoPage.currentIndexL - 4) || (index > this.br.twoPage.currentIndexR + 4)) {\n delete this.pageContainers[index];\n }\n }\n }\n\n /**\n * This function prepares the \"View Page n\" popup that shows while the mouse is\n * over the left/right \"stack of sheets\" edges. It also binds the mouse\n * events for these divs.\n */\n preparePopUp() {\n this.br.twoPagePopUp = document.createElement('div');\n this.br.twoPagePopUp.className = 'BRtwoPagePopUp';\n $(this.br.twoPagePopUp).css({\n zIndex: '1000'\n }).appendTo(this.br.refs.$brContainer);\n $(this.br.twoPagePopUp).hide();\n\n const leafEdges = [\n {\n $leafEdge: $(this.leafEdgeL),\n /** @type {function(number): PageIndex} */\n jumpIndexForPageX: this.jumpIndexForLeftEdgePageX.bind(this),\n leftOffset: () => -$(this.br.twoPagePopUp).width() + 120,\n },\n {\n $leafEdge: $(this.leafEdgeR),\n /** @type {function(number): PageIndex} */\n jumpIndexForPageX: this.jumpIndexForRightEdgePageX.bind(this),\n leftOffset: () => -120,\n },\n ];\n\n for (const { $leafEdge, jumpIndexForPageX, leftOffset } of leafEdges) {\n $leafEdge.on('mouseenter', () => $(this.br.twoPagePopUp).show());\n $leafEdge.on('mouseleave', () => $(this.br.twoPagePopUp).hide());\n\n $leafEdge.on('click', e => {\n this.br.trigger(EVENTS.stop);\n this.br.jumpToIndex(jumpIndexForPageX(e.pageX));\n });\n\n $leafEdge.on('mousemove', e => {\n const jumpIndex = clamp(jumpIndexForPageX(e.pageX), 0, this.book.getNumLeafs() - 1);\n $(this.br.twoPagePopUp).text(`View ${this.book.getPageName(jumpIndex)}`);\n\n // $$$ TODO: Make sure popup is positioned so that it is in view\n // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)\n $(this.br.twoPagePopUp).css({\n left: `${e.pageX - this.br.refs.$brContainer.offset().left + this.br.refs.$brContainer.scrollLeft() + leftOffset()}px`,\n top: `${e.pageY - this.br.refs.$brContainer.offset().top + this.br.refs.$brContainer.scrollTop()}px`\n });\n });\n }\n }\n\n setSpreadIndices() {\n const targetLeaf = clamp(this.br.firstIndex, this.br.firstDisplayableIndex(), this.br.lastDisplayableIndex());\n const currentSpreadIndices = this.book.getSpreadIndices(targetLeaf);\n this.br.twoPage.currentIndexL = currentSpreadIndices[0];\n this.br.twoPage.currentIndexR = currentSpreadIndices[1];\n }\n\n /**\n * Calculates 2-page spread dimensions based on this.br.twoPage.currentIndexL and\n * this.br.twoPage.currentIndexR\n * This function sets this.br.twoPage.height, twoPage.width\n */\n calculateSpreadSize() {\n const firstIndex = this.br.twoPage.currentIndexL;\n const secondIndex = this.br.twoPage.currentIndexR;\n\n // Calculate page sizes and total leaf width\n let spreadSize;\n if ( this.br.twoPage.autofit) {\n spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);\n } else {\n // set based on reduction factor\n spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.br.reduce);\n }\n // Both pages together\n this.br.twoPage.height = spreadSize.height || 0;\n this.br.twoPage.width = spreadSize.width || 0;\n\n // Individual pages\n this.br.twoPage.scaledWL = this.getPageWidth(firstIndex) || 0;\n this.br.twoPage.scaledWR = this.getPageWidth(secondIndex) || 0;\n\n // Leaf edges\n this.br.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges\n this.br.twoPage.leafEdgeWidthL = this.br.leafEdgeWidth(this.br.twoPage.currentIndexL);\n this.br.twoPage.leafEdgeWidthR = this.br.twoPage.edgeWidth - this.br.twoPage.leafEdgeWidthL;\n\n\n // Book cover\n // The width of the book cover div. The combined width of both pages, twice the width\n // of the book cover internal padding (2*10) and the page edges\n this.br.twoPage.bookCoverDivWidth = this.coverWidth(this.br.twoPage.scaledWL + this.br.twoPage.scaledWR);\n // The height of the book cover div\n this.br.twoPage.bookCoverDivHeight = this.br.twoPage.height + 2 * this.br.twoPage.coverInternalPadding;\n\n\n // We calculate the total width and height for the div so that we can make the book\n // spine centered\n const leftGutterOffset = this.gutterOffsetForIndex(firstIndex);\n const leftWidthFromCenter = this.br.twoPage.scaledWL - leftGutterOffset + this.br.twoPage.leafEdgeWidthL;\n const rightWidthFromCenter = this.br.twoPage.scaledWR + leftGutterOffset + this.br.twoPage.leafEdgeWidthR;\n const largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );\n this.br.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.br.twoPage.coverInternalPadding + this.br.twoPage.coverExternalPadding);\n this.br.twoPage.totalHeight = this.br.twoPage.height + 2 * (this.br.twoPage.coverInternalPadding + this.br.twoPage.coverExternalPadding);\n\n // We want to minimize the unused space in two-up mode (maximize the amount of page\n // shown). We give width to the leaf edges and these widths change (though the sum\n // of the two remains constant) as we flip through the book. With the book\n // cover centered and fixed in the BRcontainer div the page images will meet\n // at the \"gutter\" which is generally offset from the center.\n this.br.twoPage.middle = this.br.twoPage.totalWidth >> 1;\n this.br.twoPage.gutter = this.br.twoPage.middle + this.gutterOffsetForIndex(firstIndex);\n\n // The left edge of the book cover moves depending on the width of the pages\n // $$$ change to getter\n this.br.twoPage.bookCoverDivLeft = this.br.twoPage.gutter - this.br.twoPage.scaledWL - this.br.twoPage.leafEdgeWidthL - this.br.twoPage.coverInternalPadding;\n // The top edge of the book cover stays a fixed distance from the top\n this.br.twoPage.bookCoverDivTop = this.br.twoPage.coverExternalPadding;\n\n // Book spine\n this.br.twoPage.bookSpineDivHeight = this.br.twoPage.height + 2 * this.br.twoPage.coverInternalPadding;\n this.br.twoPage.bookSpineDivLeft = this.br.twoPage.middle - (this.br.twoPage.bookSpineDivWidth >> 1);\n this.br.twoPage.bookSpineDivTop = this.br.twoPage.bookCoverDivTop;\n\n this.br.reduce = spreadSize.reduce < 0 ? this.br.reduce : spreadSize.reduce; // $$$ really set this here?\n }\n\n /**\n *\n * @param {number} firstIndex\n * @param {number} secondIndex\n * @return {{ width: number, height: number, totalLeafEdgeWidth: number, reduce: number}}\n */\n getIdealSpreadSize(firstIndex, secondIndex) {\n const ideal = {};\n\n // We check which page is closest to a \"normal\" page and use that to set the height\n // for both pages. This means that foldouts and other odd size pages will be displayed\n // smaller than the nominal zoom amount.\n const canon5Dratio = 1.5;\n\n const first = {\n height: this.book._getPageHeight(firstIndex),\n width: this.book._getPageWidth(firstIndex)\n };\n\n const second = {\n height: this.book._getPageHeight(secondIndex),\n width: this.book._getPageWidth(secondIndex)\n };\n\n const firstIndexRatio = first.height / first.width;\n const secondIndexRatio = second.height / second.width;\n\n let ratio;\n if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {\n ratio = firstIndexRatio;\n } else {\n ratio = secondIndexRatio;\n }\n\n const totalLeafEdgeWidth = Math.floor(this.book.getNumLeafs() * 0.1);\n const maxLeafEdgeWidth = Math.floor(this.br.refs.$brContainer.prop('clientWidth') * 0.1);\n ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);\n\n const widthOutsidePages = 2 * (this.br.twoPage.coverInternalPadding + this.br.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;\n const heightOutsidePages = 2 * (this.br.twoPage.coverInternalPadding + this.br.twoPage.coverExternalPadding);\n\n ideal.width = (this.br.refs.$brContainer.width() - widthOutsidePages) >> 1;\n ideal.width = ideal.width > 10 ? ideal.width - 10 : 1; // $$$ fudge factor\n\n ideal.height = this.br.refs.$brContainer.height() - heightOutsidePages;\n ideal.height = ideal.height > 15 ? ideal.height - 15 : 1; // $$$ fudge factor\n\n if (ideal.height / ratio <= ideal.width) {\n //use height\n ideal.width = Math.floor(ideal.height / ratio) || 1;\n } else {\n //use width\n ideal.height = Math.floor(ideal.width * ratio) || 1;\n }\n\n // $$$ check this logic with large spreads\n ideal.reduce = Math.round(((first.height + second.height) / 2) / ideal.height);\n\n return ideal;\n }\n\n /**\n * Returns the spread size calculated from the reduction factor for the given pages\n * @param {number} firstIndex\n * @param {number} secondIndex\n * @return {Object}\n */\n getSpreadSizeFromReduce(firstIndex, secondIndex, reduce) {\n const spreadSize = {};\n // $$$ Scale this based on reduce?\n const totalLeafEdgeWidth = Math.floor(this.book.getNumLeafs() * 0.1);\n // $$$ Assumes leaf edge width constant at all zoom levels\n const maxLeafEdgeWidth = Math.floor(this.br.refs.$brContainer.prop('clientWidth') * 0.1);\n spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);\n\n // $$$ Possibly incorrect -- we should make height \"dominant\"\n const nativeWidth = this.book._getPageWidth(firstIndex) + this.book._getPageWidth(secondIndex);\n const nativeHeight = this.book._getPageHeight(firstIndex) + this.book._getPageHeight(secondIndex);\n spreadSize.height = Math.floor( (nativeHeight / 2) / this.br.reduce );\n spreadSize.width = Math.floor( (nativeWidth / 2) / this.br.reduce );\n spreadSize.reduce = reduce;\n\n return spreadSize;\n }\n\n /**\n * Returns the current ideal reduction factor\n * @return {number}\n */\n getAutofitReduce() {\n const spreadSize = this.getIdealSpreadSize(this.br.twoPage.currentIndexL, this.br.twoPage.currentIndexR);\n return spreadSize.reduce;\n }\n\n /**\n * Returns true if the pages extend past the edge of the view\n * @deprecated slated for deprecation by v5.0.0\n * @return {boolean}\n */\n isZoomedIn() {\n let isZoomedIn = false;\n if (this.br.twoPage.autofit != 'auto') {\n if (this.br.reduce < this.getAutofitReduce()) {\n isZoomedIn = true;\n }\n }\n return isZoomedIn;\n }\n\n calculateReductionFactors() {\n this.br.twoPage.reductionFactors = this.br.reductionFactors.concat([\n {\n reduce: this.getIdealSpreadSize( this.br.twoPage.currentIndexL, this.br.twoPage.currentIndexR ).reduce,\n autofit: 'auto'\n }\n ]);\n this.br.twoPage.reductionFactors.sort(this.br._reduceSort);\n }\n\n /**\n * Set the cursor for two page view\n * @deprecated Since version 4.3.3. Will be deleted in version 5.0\n */\n setCursor() {\n console.warn('Call to deprecated method, Mode2Up.setCursor. No-op.');\n }\n\n /**\n * @param {Number|null} index to flip back one spread, pass index=null\n */\n flipBackToIndex(index) {\n if (this.br.constMode1up == this.br.mode) return;\n if (this.br.animating) return;\n\n if (null != this.br.leafEdgeTmp) {\n alert('error: leafEdgeTmp should be null!');\n return;\n }\n\n if (null == index) {\n const {currentIndexL, currentIndexR} = this.br.twoPage;\n const minDisplayedIndex = Math.min(currentIndexL, currentIndexR);\n const prev = this.book.getPage(minDisplayedIndex).findPrev({ combineConsecutiveUnviewables: true });\n if (!prev) return;\n index = prev.index;\n // Can only flip to a left page\n // (downstream code handles index = -1, so this is ok I guess)\n if (prev.pageSide == 'R') index--;\n }\n\n this.br.updateNavIndexThrottled(index);\n\n const previousIndices = this.book.getSpreadIndices(index);\n\n if (previousIndices[0] < this.br.firstDisplayableIndex() || previousIndices[1] < this.br.firstDisplayableIndex()) {\n return;\n }\n\n this.br.animating = true;\n\n if ('rl' != this.br.pageProgression) {\n // Assume LTR and we are going backward\n this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);\n this.flipLeftToRight(previousIndices[0], previousIndices[1]);\n } else {\n // RTL and going backward\n this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);\n this.flipRightToLeft(previousIndices[0], previousIndices[1]);\n }\n }\n\n /**\n * Flips the page on the left towards the page on the right\n * @param {number} newIndexL\n * @param {number} newIndexR\n */\n flipLeftToRight(newIndexL, newIndexR) {\n this.br.refs.$brContainer.addClass(\"BRpageFlipping\");\n const leftLeaf = this.br.twoPage.currentIndexL;\n\n const oldLeafEdgeWidthL = this.br.leafEdgeWidth(this.br.twoPage.currentIndexL);\n const newLeafEdgeWidthL = this.br.leafEdgeWidth(newIndexL);\n const leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;\n\n const currWidthL = this.getPageWidth(leftLeaf);\n const newWidthL = this.getPageWidth(newIndexL);\n const newWidthR = this.getPageWidth(newIndexR);\n\n const top = this.top();\n const gutter = this.br.twoPage.middle + this.gutterOffsetForIndex(newIndexL);\n\n //animation strategy:\n // 0. remove search highlight, if any.\n // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge\n // of the left leaf and where the user clicked in the leaf edge.\n // Note that if this function was triggered by left() and not a\n // mouse click, the width of leafEdgeTmp is very small (zero px).\n // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate\n // leftLeaf to width=0.\n // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf\n // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to\n // its new full width.\n // 4. After step 3 is finished, do the following:\n // - remove leafEdgeTmp from the dom.\n // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR\n // and width=twoPage.edgeWidth-newLeafEdgeWidthL.\n // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL\n // and width=newLeafEdgeWidthL.\n // - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10\n // and width=newWidthL+newWidthR+twoPage.edgeWidth+20\n // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.\n // - remove old left and right leafs from the dom [prunePageContainers()].\n // - prefetch new adjacent leafs.\n // - set up click handlers for both new left and right leafs.\n // - redraw the search highlight.\n // - update the pagenum box and the url.\n\n const $twoPageViewEl = this.br.refs.$brTwoPageView;\n const leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;\n\n this.br.leafEdgeTmp = document.createElement('div');\n this.br.leafEdgeTmp.className = 'BRleafEdgeTmp';\n $(this.br.leafEdgeTmp).css({\n width: `${leafEdgeTmpW}px`,\n height: `${this.br.twoPage.height}px`,\n left: `${leftEdgeTmpLeft}px`,\n top: `${top}px`,\n zIndex: 1000,\n }).appendTo($twoPageViewEl);\n\n $(this.leafEdgeL).css({\n width: `${newLeafEdgeWidthL}px`,\n left: `${gutter - currWidthL - newLeafEdgeWidthL}px`\n });\n\n // Left gets the offset of the current left leaf from the document\n const left = this.pageContainers[leftLeaf].$container.offset().left;\n // $$$ This seems very similar to the gutter. May be able to consolidate the logic.\n const right = `${$twoPageViewEl.prop('clientWidth') - left - this.pageContainers[leftLeaf].$container.width() + $twoPageViewEl.offset().left - 2}px`;\n\n // We change the left leaf to right positioning\n // $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327\n this.pageContainers[leftLeaf].$container.css({\n right,\n left: ''\n });\n\n $(this.br.leafEdgeTmp).animate({left: gutter}, this.br.flipSpeed, 'easeInSine');\n\n if (this.br.enableSearch) this.br.removeSearchHilites();\n\n this.pageContainers[leftLeaf].$container.animate({width: '0px'}, this.br.flipSpeed, 'easeInSine', () => {\n\n $(this.br.leafEdgeTmp).animate({left: `${gutter + newWidthR}px`}, this.br.flipSpeed, 'easeOutSine');\n\n this.br.$('.BRgutter').css({left: `${gutter - this.br.twoPage.bookSpineDivWidth * 0.5}px`});\n\n this.pageContainers[newIndexR].$container.animate({width: `${newWidthR}px`}, this.br.flipSpeed, 'easeOutSine', () => {\n this.pageContainers[newIndexL].$container.css('zIndex', 2);\n\n $(this.leafEdgeR).css({\n // Moves the right leaf edge\n width: `${this.br.twoPage.edgeWidth - newLeafEdgeWidthL}px`,\n left: `${gutter + newWidthR}px`\n });\n\n $(this.leafEdgeL).css({\n // Moves and resizes the left leaf edge\n width: `${newLeafEdgeWidthL}px`,\n left: `${gutter - newWidthL - newLeafEdgeWidthL}px`\n });\n\n // Resizes the brown border div\n $(this.br.twoPage.coverDiv).css({\n width: `${this.coverWidth(newWidthL + newWidthR)}px`,\n left: `${gutter - newWidthL - newLeafEdgeWidthL - this.br.twoPage.coverInternalPadding}px`\n });\n\n $(this.br.leafEdgeTmp).remove();\n this.br.leafEdgeTmp = null;\n\n // $$$ TODO refactor with opposite direction flip\n\n this.br.twoPage.currentIndexL = newIndexL;\n this.br.twoPage.currentIndexR = newIndexR;\n this.br.twoPage.scaledWL = newWidthL;\n this.br.twoPage.scaledWR = newWidthR;\n this.br.twoPage.gutter = gutter;\n\n this.br.updateFirstIndex(this.br.twoPage.currentIndexL);\n this.br.displayedIndices = [newIndexL, newIndexR];\n this.prunePageContainers();\n this.br.animating = false;\n\n this.resizeSpread();\n\n if (this.br.enableSearch) this.br.updateSearchHilites();\n\n this.setMouseHandlers();\n\n if (this.br.animationFinishedCallback) {\n this.br.animationFinishedCallback();\n this.br.animationFinishedCallback = null;\n }\n\n this.br.refs.$brContainer.removeClass(\"BRpageFlipping\");\n this.br.textSelectionPlugin?.stopPageFlip(this.br.refs.$brContainer);\n this.centerView();\n this.br.trigger('pageChanged');\n\n // get next previous batch immediately\n this.prunePageContainers();\n this.createPageContainer(newIndexL - 2);\n this.createPageContainer(newIndexR - 2);\n this.createPageContainer(newIndexL - 3);\n this.createPageContainer(newIndexR - 3);\n });\n });\n }\n\n /**\n * @param {PageIndex} index\n */\n createPageContainer(index, fetch = false) {\n if (!this.pageContainers[index]) {\n this.pageContainers[index] = this.br._createPageContainer(index);\n }\n this.pageContainers[index].update({ reduce: this.br.reduce });\n return this.pageContainers[index];\n }\n\n /**\n * Whether we flip left or right is dependent on the page progression\n * to flip forward one spread, pass index=null\n * @param {number} index\n */\n flipFwdToIndex(index) {\n if (this.br.animating) return;\n\n if (null != this.br.leafEdgeTmp) {\n alert('error: leafEdgeTmp should be null!');\n return;\n }\n\n if (null == index) {\n // Need to use the max here, since it could be a right to left book\n const {currentIndexL, currentIndexR} = this.br.twoPage;\n const maxDisplayedIndex = Math.max(currentIndexL, currentIndexR);\n const nextPage = this.book.getPage(maxDisplayedIndex).findNext({ combineConsecutiveUnviewables: true });\n if (!nextPage) return;\n index = nextPage.index;\n }\n if (index > this.br.lastDisplayableIndex()) return;\n\n this.br.updateNavIndexThrottled(index);\n\n this.br.animating = true;\n\n const nextIndices = this.book.getSpreadIndices(index);\n\n if ('rl' != this.br.pageProgression) {\n // We did not specify RTL\n this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);\n this.flipRightToLeft(nextIndices[0], nextIndices[1]);\n } else {\n // RTL\n this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);\n this.flipLeftToRight(nextIndices[0], nextIndices[1]);\n }\n }\n\n /**\n * Flip from left to right and show the nextL and nextR indices on those sides\n * $$$ better not to have to pass gutter in\n * @param {number} newIndexL\n * @param {number} newIndexR\n */\n flipRightToLeft(newIndexL, newIndexR) {\n this.br.refs.$brContainer.addClass(\"BRpageFlipping\");\n\n const oldLeafEdgeWidthL = this.br.leafEdgeWidth(this.br.twoPage.currentIndexL);\n const oldLeafEdgeWidthR = this.br.twoPage.edgeWidth - oldLeafEdgeWidthL;\n const newLeafEdgeWidthL = this.br.leafEdgeWidth(newIndexL);\n const newLeafEdgeWidthR = this.br.twoPage.edgeWidth - newLeafEdgeWidthL;\n\n const leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;\n\n const top = this.top();\n const scaledW = this.getPageWidth(this.br.twoPage.currentIndexR);\n\n const middle = this.br.twoPage.middle;\n const gutter = middle + this.gutterOffsetForIndex(newIndexL);\n\n const $twoPageViewEl = this.br.refs.$brTwoPageView;\n\n this.br.leafEdgeTmp = document.createElement('div');\n this.br.leafEdgeTmp.className = 'BRleafEdgeTmp';\n $(this.br.leafEdgeTmp).css({\n width: `${leafEdgeTmpW}px`,\n height: `${this.br.twoPage.height}px`,\n left: `${gutter + scaledW}px`,\n top: `${top}px`,\n zIndex:1000\n }).appendTo($twoPageViewEl);\n\n const newWidthL = this.getPageWidth(newIndexL);\n const newWidthR = this.getPageWidth(newIndexR);\n\n $(this.leafEdgeR).css({width: `${newLeafEdgeWidthR}px`, left: `${gutter + newWidthR}px` });\n const speed = this.br.flipSpeed;\n\n if (this.br.enableSearch) this.br.removeSearchHilites();\n\n $(this.br.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');\n this.pageContainers[this.br.twoPage.currentIndexR].$container.animate({width: '0px'}, speed, 'easeInSine', () => {\n this.br.$('BRgutter').css({left: `${gutter - this.br.twoPage.bookSpineDivWidth * 0.5}px`});\n $(this.br.leafEdgeTmp).animate({left: `${gutter - newWidthL - leafEdgeTmpW}px`}, speed, 'easeOutSine');\n this.pageContainers[newIndexL].$container.animate({width: `${newWidthL}px`}, speed, 'easeOutSine', () => {\n this.pageContainers[newIndexR].$container.css('zIndex', 2);\n\n $(this.leafEdgeL).css({\n width: `${newLeafEdgeWidthL}px`,\n left: `${gutter - newWidthL - newLeafEdgeWidthL}px`\n });\n\n // Resizes the book cover\n $(this.br.twoPage.coverDiv).css({\n width: `${this.coverWidth(newWidthL + newWidthR)}px`,\n left: `${gutter - newWidthL - newLeafEdgeWidthL - this.br.twoPage.coverInternalPadding}px`\n });\n\n $(this.br.leafEdgeTmp).remove();\n this.br.leafEdgeTmp = null;\n\n this.br.twoPage.currentIndexL = newIndexL;\n this.br.twoPage.currentIndexR = newIndexR;\n this.br.twoPage.scaledWL = newWidthL;\n this.br.twoPage.scaledWR = newWidthR;\n this.br.twoPage.gutter = gutter;\n\n this.br.updateFirstIndex(this.br.twoPage.currentIndexL);\n this.br.displayedIndices = [newIndexL, newIndexR];\n this.prunePageContainers();\n this.br.animating = false;\n\n this.resizeSpread();\n\n if (this.br.enableSearch) this.br.updateSearchHilites();\n\n this.setMouseHandlers();\n\n if (this.br.animationFinishedCallback) {\n this.br.animationFinishedCallback();\n this.br.animationFinishedCallback = null;\n }\n\n this.br.refs.$brContainer.removeClass(\"BRpageFlipping\");\n this.br.textSelectionPlugin?.stopPageFlip(this.br.refs.$brContainer);\n this.centerView();\n this.br.trigger('pageChanged');\n\n this.prunePageContainers();\n this.createPageContainer(newIndexL + 2);\n this.createPageContainer(newIndexR + 2);\n this.createPageContainer(newIndexL + 3);\n this.createPageContainer(newIndexR + 3);\n });\n });\n }\n\n setMouseHandlers() {\n /**\n * @param {HTMLElement} element\n * @param {JQuery.MouseDownEvent\n Share\n \n
\n \n
`));\n }\n }\n}\n","/**\n * Bind mouse handlers\n * Disable mouse click to avoid selected/highlighted page images\n * @param {JQuery} jObject\n */\nexport function disableSelect(jObject) {\n // $$$ check here for right-click and don't disable. Also use jQuery style\n // for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626\n jObject.bind('mousedown', () => false);\n // Special hack for IE7\n jObject[0].onselectstart = () => false;\n}\n\n/**\n * @param {number} value\n * @param {number} min\n * @param {number} max\n * @return {number}\n */\nexport function clamp(value, min, max) {\n return Math.min(Math.max(value, min), max);\n}\n\n/**\n * Given value and maximum, calculate a percentage suitable for CSS\n * @param {number} value\n * @param {number} max\n * @return {string}\n */\nexport function cssPercentage(value, max) {\n return ((value / max) * 100) + '%';\n}\n\n/**\n * @param {*} value\n * @param {Array} array\n * @return {boolean}\n */\nexport function notInArray(value, array) {\n return !array.includes(value);\n}\n\n/**\n * @param {HTMLIFrameElement} iframe\n * @return {Document}\n */\nexport function getIFrameDocument(iframe) {\n// Adapted from http://xkr.us/articles/dom/iframe-document/\n const outer = iframe.contentWindow || iframe.contentDocument;\n return outer.document || outer;\n}\n\n/**\n * @param {string} str\n * @return {string}\n */\nexport function escapeHTML(str) {\n return str.replace(/&/g,'&')\n .replace(/>/g,'>')\n .replace(/ {\n timeout = null;\n if (!immediate) func.apply(context, args);\n };\n const callNow = immediate && !timeout;\n clearTimeout(timeout);\n timeout = setTimeout(later, wait);\n if (callNow) func.apply(context, args);\n };\n}\n\n/**\n * Throttle function\n * @see https://remysharp.com/2010/07/21/throttling-function-calls\n * @param {Function} fn\n * @param {number} threshold\n * @param {boolean} delay\n * @return {Function}\n */\nexport function throttle(fn, threshold, delay) {\n threshold || (threshold = 250);\n let last;\n let deferTimer;\n if (delay) last = +new Date;\n return function () {\n const context = this;\n const now = +new Date;\n const args = arguments;\n if (last && now < last + threshold) {\n // hold on to it\n clearTimeout(deferTimer);\n deferTimer = setTimeout(() => {\n last = now;\n fn.apply(context, args);\n }, threshold);\n } else {\n last = now;\n fn.apply(context, args);\n }\n };\n}\n\n/**\n * FIXME we need a better way to do this :/ This is not automatically poly-filled by\n * core-js https://github.com/zloirock/core-js/issues/354\n * @param {Window} window\n */\nexport function polyfillCustomEvent(window) {\n if (typeof window.CustomEvent === \"function\") return false;\n window.CustomEvent = PolyfilledCustomEvent;\n}\n\n/**\n * https://caniuse.com/customevent has issues on older browsers where it can't be\n * called as a constructor, so we have to use older methods.\n * @param {String} eventName\n * @return {CustomEvent}\n */\nexport function PolyfilledCustomEvent(eventName, {bubbles = false, cancelable = false, detail = null} = {}) {\n const event = document.createEvent('CustomEvent');\n event.initCustomEvent(eventName, bubbles, cancelable, detail);\n return event;\n}\n\n/**\n * Promise based sleep - resolves at default 500ms\n * @param {Number} wait time in milliseconds\n */\nexport function sleep(ms = 500) {\n return new Promise(res => setTimeout(res(true), ms));\n}\n\n/*\n * Returns the number pixels something should be rendered at to be ~1n on the users\n * screen when measured with a ruler.\n */\nexport function calcScreenDPI() {\n const el = document.createElement('div');\n el.style.width = '1in';\n document.body.appendChild(el);\n const dpi = el.offsetWidth;\n document.body.removeChild(el);\n\n const screenDPI = dpi * devicePixelRatio;\n // This will return 0 in testing; never want it to be 0!\n return screenDPI == 0 ? 100 : screenDPI;\n}\n","module.exports = function (it) {\n if (typeof it != 'function') {\n throw TypeError(String(it) + ' is not a function');\n } return it;\n};\n","var isObject = require('../internals/is-object');\n\nmodule.exports = function (it) {\n if (!isObject(it) && it !== null) {\n throw TypeError(\"Can't set \" + String(it) + ' as a prototype');\n } return it;\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\nvar create = require('../internals/object-create');\nvar definePropertyModule = require('../internals/object-define-property');\n\nvar UNSCOPABLES = wellKnownSymbol('unscopables');\nvar ArrayPrototype = Array.prototype;\n\n// Array.prototype[@@unscopables]\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\nif (ArrayPrototype[UNSCOPABLES] == undefined) {\n definePropertyModule.f(ArrayPrototype, UNSCOPABLES, {\n configurable: true,\n value: create(null)\n });\n}\n\n// add a key to Array.prototype[@@unscopables]\nmodule.exports = function (key) {\n ArrayPrototype[UNSCOPABLES][key] = true;\n};\n","'use strict';\nvar charAt = require('../internals/string-multibyte').charAt;\n\n// `AdvanceStringIndex` abstract operation\n// https://tc39.es/ecma262/#sec-advancestringindex\nmodule.exports = function (S, index, unicode) {\n return index + (unicode ? charAt(S, index).length : 1);\n};\n","module.exports = function (it, Constructor, name) {\n if (!(it instanceof Constructor)) {\n throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');\n } return it;\n};\n","var isObject = require('../internals/is-object');\n\nmodule.exports = function (it) {\n if (!isObject(it)) {\n throw TypeError(String(it) + ' is not an object');\n } return it;\n};\n","'use strict';\nvar $forEach = require('../internals/array-iteration').forEach;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\n\nvar STRICT_METHOD = arrayMethodIsStrict('forEach');\n\n// `Array.prototype.forEach` method implementation\n// https://tc39.es/ecma262/#sec-array.prototype.foreach\nmodule.exports = !STRICT_METHOD ? function forEach(callbackfn /* , thisArg */) {\n return $forEach(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n// eslint-disable-next-line es/no-array-prototype-foreach -- safe\n} : [].forEach;\n","'use strict';\nvar bind = require('../internals/function-bind-context');\nvar toObject = require('../internals/to-object');\nvar callWithSafeIterationClosing = require('../internals/call-with-safe-iteration-closing');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar toLength = require('../internals/to-length');\nvar createProperty = require('../internals/create-property');\nvar getIteratorMethod = require('../internals/get-iterator-method');\n\n// `Array.from` method implementation\n// https://tc39.es/ecma262/#sec-array.from\nmodule.exports = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {\n var O = toObject(arrayLike);\n var C = typeof this == 'function' ? this : Array;\n var argumentsLength = arguments.length;\n var mapfn = argumentsLength > 1 ? arguments[1] : undefined;\n var mapping = mapfn !== undefined;\n var iteratorMethod = getIteratorMethod(O);\n var index = 0;\n var length, result, step, iterator, next, value;\n if (mapping) mapfn = bind(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);\n // if the target is not iterable or it's an array with the default iterator - use a simple case\n if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {\n iterator = iteratorMethod.call(O);\n next = iterator.next;\n result = new C();\n for (;!(step = next.call(iterator)).done; index++) {\n value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;\n createProperty(result, index, value);\n }\n } else {\n length = toLength(O.length);\n result = new C(length);\n for (;length > index; index++) {\n value = mapping ? mapfn(O[index], index) : O[index];\n createProperty(result, index, value);\n }\n }\n result.length = index;\n return result;\n};\n","var toIndexedObject = require('../internals/to-indexed-object');\nvar toLength = require('../internals/to-length');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\n\n// `Array.prototype.{ indexOf, includes }` methods implementation\nvar createMethod = function (IS_INCLUDES) {\n return function ($this, el, fromIndex) {\n var O = toIndexedObject($this);\n var length = toLength(O.length);\n var index = toAbsoluteIndex(fromIndex, length);\n var value;\n // Array#includes uses SameValueZero equality algorithm\n // eslint-disable-next-line no-self-compare -- NaN check\n if (IS_INCLUDES && el != el) while (length > index) {\n value = O[index++];\n // eslint-disable-next-line no-self-compare -- NaN check\n if (value != value) return true;\n // Array#indexOf ignores holes, Array#includes - not\n } else for (;length > index; index++) {\n if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;\n } return !IS_INCLUDES && -1;\n };\n};\n\nmodule.exports = {\n // `Array.prototype.includes` method\n // https://tc39.es/ecma262/#sec-array.prototype.includes\n includes: createMethod(true),\n // `Array.prototype.indexOf` method\n // https://tc39.es/ecma262/#sec-array.prototype.indexof\n indexOf: createMethod(false)\n};\n","var bind = require('../internals/function-bind-context');\nvar IndexedObject = require('../internals/indexed-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\nvar push = [].push;\n\n// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterOut }` methods implementation\nvar createMethod = function (TYPE) {\n var IS_MAP = TYPE == 1;\n var IS_FILTER = TYPE == 2;\n var IS_SOME = TYPE == 3;\n var IS_EVERY = TYPE == 4;\n var IS_FIND_INDEX = TYPE == 6;\n var IS_FILTER_OUT = TYPE == 7;\n var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;\n return function ($this, callbackfn, that, specificCreate) {\n var O = toObject($this);\n var self = IndexedObject(O);\n var boundFunction = bind(callbackfn, that, 3);\n var length = toLength(self.length);\n var index = 0;\n var create = specificCreate || arraySpeciesCreate;\n var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_OUT ? create($this, 0) : undefined;\n var value, result;\n for (;length > index; index++) if (NO_HOLES || index in self) {\n value = self[index];\n result = boundFunction(value, index, O);\n if (TYPE) {\n if (IS_MAP) target[index] = result; // map\n else if (result) switch (TYPE) {\n case 3: return true; // some\n case 5: return value; // find\n case 6: return index; // findIndex\n case 2: push.call(target, value); // filter\n } else switch (TYPE) {\n case 4: return false; // every\n case 7: push.call(target, value); // filterOut\n }\n }\n }\n return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;\n };\n};\n\nmodule.exports = {\n // `Array.prototype.forEach` method\n // https://tc39.es/ecma262/#sec-array.prototype.foreach\n forEach: createMethod(0),\n // `Array.prototype.map` method\n // https://tc39.es/ecma262/#sec-array.prototype.map\n map: createMethod(1),\n // `Array.prototype.filter` method\n // https://tc39.es/ecma262/#sec-array.prototype.filter\n filter: createMethod(2),\n // `Array.prototype.some` method\n // https://tc39.es/ecma262/#sec-array.prototype.some\n some: createMethod(3),\n // `Array.prototype.every` method\n // https://tc39.es/ecma262/#sec-array.prototype.every\n every: createMethod(4),\n // `Array.prototype.find` method\n // https://tc39.es/ecma262/#sec-array.prototype.find\n find: createMethod(5),\n // `Array.prototype.findIndex` method\n // https://tc39.es/ecma262/#sec-array.prototype.findIndex\n findIndex: createMethod(6),\n // `Array.prototype.filterOut` method\n // https://github.com/tc39/proposal-array-filtering\n filterOut: createMethod(7)\n};\n","var fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar SPECIES = wellKnownSymbol('species');\n\nmodule.exports = function (METHOD_NAME) {\n // We can't use this feature detection in V8 since it causes\n // deoptimization and serious performance degradation\n // https://github.com/zloirock/core-js/issues/677\n return V8_VERSION >= 51 || !fails(function () {\n var array = [];\n var constructor = array.constructor = {};\n constructor[SPECIES] = function () {\n return { foo: 1 };\n };\n return array[METHOD_NAME](Boolean).foo !== 1;\n });\n};\n","'use strict';\nvar fails = require('../internals/fails');\n\nmodule.exports = function (METHOD_NAME, argument) {\n var method = [][METHOD_NAME];\n return !!method && fails(function () {\n // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing\n method.call(null, argument || function () { throw 1; }, 1);\n });\n};\n","var aFunction = require('../internals/a-function');\nvar toObject = require('../internals/to-object');\nvar IndexedObject = require('../internals/indexed-object');\nvar toLength = require('../internals/to-length');\n\n// `Array.prototype.{ reduce, reduceRight }` methods implementation\nvar createMethod = function (IS_RIGHT) {\n return function (that, callbackfn, argumentsLength, memo) {\n aFunction(callbackfn);\n var O = toObject(that);\n var self = IndexedObject(O);\n var length = toLength(O.length);\n var index = IS_RIGHT ? length - 1 : 0;\n var i = IS_RIGHT ? -1 : 1;\n if (argumentsLength < 2) while (true) {\n if (index in self) {\n memo = self[index];\n index += i;\n break;\n }\n index += i;\n if (IS_RIGHT ? index < 0 : length <= index) {\n throw TypeError('Reduce of empty array with no initial value');\n }\n }\n for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {\n memo = callbackfn(memo, self[index], index, O);\n }\n return memo;\n };\n};\n\nmodule.exports = {\n // `Array.prototype.reduce` method\n // https://tc39.es/ecma262/#sec-array.prototype.reduce\n left: createMethod(false),\n // `Array.prototype.reduceRight` method\n // https://tc39.es/ecma262/#sec-array.prototype.reduceright\n right: createMethod(true)\n};\n","var isObject = require('../internals/is-object');\nvar isArray = require('../internals/is-array');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\n// `ArraySpeciesCreate` abstract operation\n// https://tc39.es/ecma262/#sec-arrayspeciescreate\nmodule.exports = function (originalArray, length) {\n var C;\n if (isArray(originalArray)) {\n C = originalArray.constructor;\n // cross-realm fallback\n if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;\n else if (isObject(C)) {\n C = C[SPECIES];\n if (C === null) C = undefined;\n }\n } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);\n};\n","var anObject = require('../internals/an-object');\nvar iteratorClose = require('../internals/iterator-close');\n\n// call something on iterator step with safe closing on error\nmodule.exports = function (iterator, fn, value, ENTRIES) {\n try {\n return ENTRIES ? fn(anObject(value)[0], value[1]) : fn(value);\n // 7.4.6 IteratorClose(iterator, completion)\n } catch (error) {\n iteratorClose(iterator);\n throw error;\n }\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar SAFE_CLOSING = false;\n\ntry {\n var called = 0;\n var iteratorWithReturn = {\n next: function () {\n return { done: !!called++ };\n },\n 'return': function () {\n SAFE_CLOSING = true;\n }\n };\n iteratorWithReturn[ITERATOR] = function () {\n return this;\n };\n // eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing\n Array.from(iteratorWithReturn, function () { throw 2; });\n} catch (error) { /* empty */ }\n\nmodule.exports = function (exec, SKIP_CLOSING) {\n if (!SKIP_CLOSING && !SAFE_CLOSING) return false;\n var ITERATION_SUPPORT = false;\n try {\n var object = {};\n object[ITERATOR] = function () {\n return {\n next: function () {\n return { done: ITERATION_SUPPORT = true };\n }\n };\n };\n exec(object);\n } catch (error) { /* empty */ }\n return ITERATION_SUPPORT;\n};\n","var toString = {}.toString;\n\nmodule.exports = function (it) {\n return toString.call(it).slice(8, -1);\n};\n","var TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar classofRaw = require('../internals/classof-raw');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\n// ES3 wrong here\nvar CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';\n\n// fallback for IE11 Script Access Denied error\nvar tryGet = function (it, key) {\n try {\n return it[key];\n } catch (error) { /* empty */ }\n};\n\n// getting tag from ES6+ `Object.prototype.toString`\nmodule.exports = TO_STRING_TAG_SUPPORT ? classofRaw : function (it) {\n var O, tag, result;\n return it === undefined ? 'Undefined' : it === null ? 'Null'\n // @@toStringTag case\n : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG)) == 'string' ? tag\n // builtinTag case\n : CORRECT_ARGUMENTS ? classofRaw(O)\n // ES3 arguments fallback\n : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;\n};\n","var has = require('../internals/has');\nvar ownKeys = require('../internals/own-keys');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar definePropertyModule = require('../internals/object-define-property');\n\nmodule.exports = function (target, source) {\n var keys = ownKeys(source);\n var defineProperty = definePropertyModule.f;\n var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\n for (var i = 0; i < keys.length; i++) {\n var key = keys[i];\n if (!has(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));\n }\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\nmodule.exports = function (METHOD_NAME) {\n var regexp = /./;\n try {\n '/./'[METHOD_NAME](regexp);\n } catch (error1) {\n try {\n regexp[MATCH] = false;\n return '/./'[METHOD_NAME](regexp);\n } catch (error2) { /* empty */ }\n } return false;\n};\n","var fails = require('../internals/fails');\n\nmodule.exports = !fails(function () {\n function F() { /* empty */ }\n F.prototype.constructor = null;\n // eslint-disable-next-line es/no-object-getprototypeof -- required for testing\n return Object.getPrototypeOf(new F()) !== F.prototype;\n});\n","'use strict';\nvar IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;\nvar create = require('../internals/object-create');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar Iterators = require('../internals/iterators');\n\nvar returnThis = function () { return this; };\n\nmodule.exports = function (IteratorConstructor, NAME, next) {\n var TO_STRING_TAG = NAME + ' Iterator';\n IteratorConstructor.prototype = create(IteratorPrototype, { next: createPropertyDescriptor(1, next) });\n setToStringTag(IteratorConstructor, TO_STRING_TAG, false, true);\n Iterators[TO_STRING_TAG] = returnThis;\n return IteratorConstructor;\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar definePropertyModule = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = DESCRIPTORS ? function (object, key, value) {\n return definePropertyModule.f(object, key, createPropertyDescriptor(1, value));\n} : function (object, key, value) {\n object[key] = value;\n return object;\n};\n","module.exports = function (bitmap, value) {\n return {\n enumerable: !(bitmap & 1),\n configurable: !(bitmap & 2),\n writable: !(bitmap & 4),\n value: value\n };\n};\n","'use strict';\nvar toPrimitive = require('../internals/to-primitive');\nvar definePropertyModule = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = function (object, key, value) {\n var propertyKey = toPrimitive(key);\n if (propertyKey in object) definePropertyModule.f(object, propertyKey, createPropertyDescriptor(0, value));\n else object[propertyKey] = value;\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\nvar Iterators = require('../internals/iterators');\nvar IteratorsCore = require('../internals/iterators-core');\n\nvar IteratorPrototype = IteratorsCore.IteratorPrototype;\nvar BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;\nvar ITERATOR = wellKnownSymbol('iterator');\nvar KEYS = 'keys';\nvar VALUES = 'values';\nvar ENTRIES = 'entries';\n\nvar returnThis = function () { return this; };\n\nmodule.exports = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {\n createIteratorConstructor(IteratorConstructor, NAME, next);\n\n var getIterationMethod = function (KIND) {\n if (KIND === DEFAULT && defaultIterator) return defaultIterator;\n if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];\n switch (KIND) {\n case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };\n case VALUES: return function values() { return new IteratorConstructor(this, KIND); };\n case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };\n } return function () { return new IteratorConstructor(this); };\n };\n\n var TO_STRING_TAG = NAME + ' Iterator';\n var INCORRECT_VALUES_NAME = false;\n var IterablePrototype = Iterable.prototype;\n var nativeIterator = IterablePrototype[ITERATOR]\n || IterablePrototype['@@iterator']\n || DEFAULT && IterablePrototype[DEFAULT];\n var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);\n var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;\n var CurrentIteratorPrototype, methods, KEY;\n\n // fix native\n if (anyNativeIterator) {\n CurrentIteratorPrototype = getPrototypeOf(anyNativeIterator.call(new Iterable()));\n if (IteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {\n if (!IS_PURE && getPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype) {\n if (setPrototypeOf) {\n setPrototypeOf(CurrentIteratorPrototype, IteratorPrototype);\n } else if (typeof CurrentIteratorPrototype[ITERATOR] != 'function') {\n createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR, returnThis);\n }\n }\n // Set @@toStringTag to native iterators\n setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true, true);\n if (IS_PURE) Iterators[TO_STRING_TAG] = returnThis;\n }\n }\n\n // fix Array#{values, @@iterator}.name in V8 / FF\n if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {\n INCORRECT_VALUES_NAME = true;\n defaultIterator = function values() { return nativeIterator.call(this); };\n }\n\n // define iterator\n if ((!IS_PURE || FORCED) && IterablePrototype[ITERATOR] !== defaultIterator) {\n createNonEnumerableProperty(IterablePrototype, ITERATOR, defaultIterator);\n }\n Iterators[NAME] = defaultIterator;\n\n // export additional methods\n if (DEFAULT) {\n methods = {\n values: getIterationMethod(VALUES),\n keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),\n entries: getIterationMethod(ENTRIES)\n };\n if (FORCED) for (KEY in methods) {\n if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {\n redefine(IterablePrototype, KEY, methods[KEY]);\n }\n } else $({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);\n }\n\n return methods;\n};\n","var path = require('../internals/path');\nvar has = require('../internals/has');\nvar wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');\nvar defineProperty = require('../internals/object-define-property').f;\n\nmodule.exports = function (NAME) {\n var Symbol = path.Symbol || (path.Symbol = {});\n if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {\n value: wrappedWellKnownSymbolModule.f(NAME)\n });\n};\n","var fails = require('../internals/fails');\n\n// Detect IE8's incomplete defineProperty implementation\nmodule.exports = !fails(function () {\n // eslint-disable-next-line es/no-object-defineproperty -- required for testing\n return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;\n});\n","var global = require('../internals/global');\nvar isObject = require('../internals/is-object');\n\nvar document = global.document;\n// typeof document.createElement is 'object' in old IE\nvar EXISTS = isObject(document) && isObject(document.createElement);\n\nmodule.exports = function (it) {\n return EXISTS ? document.createElement(it) : {};\n};\n","// iterable DOM collections\n// flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods\nmodule.exports = {\n CSSRuleList: 0,\n CSSStyleDeclaration: 0,\n CSSValueList: 0,\n ClientRectList: 0,\n DOMRectList: 0,\n DOMStringList: 0,\n DOMTokenList: 1,\n DataTransferItemList: 0,\n FileList: 0,\n HTMLAllCollection: 0,\n HTMLCollection: 0,\n HTMLFormElement: 0,\n HTMLSelectElement: 0,\n MediaList: 0,\n MimeTypeArray: 0,\n NamedNodeMap: 0,\n NodeList: 1,\n PaintRequestList: 0,\n Plugin: 0,\n PluginArray: 0,\n SVGLengthList: 0,\n SVGNumberList: 0,\n SVGPathSegList: 0,\n SVGPointList: 0,\n SVGStringList: 0,\n SVGTransformList: 0,\n SourceBufferList: 0,\n StyleSheetList: 0,\n TextTrackCueList: 0,\n TextTrackList: 0,\n TouchList: 0\n};\n","var userAgent = require('../internals/engine-user-agent');\n\nmodule.exports = /(?:iphone|ipod|ipad).*applewebkit/i.test(userAgent);\n","var classof = require('../internals/classof-raw');\nvar global = require('../internals/global');\n\nmodule.exports = classof(global.process) == 'process';\n","var userAgent = require('../internals/engine-user-agent');\n\nmodule.exports = /web0s(?!.*chrome)/i.test(userAgent);\n","var getBuiltIn = require('../internals/get-built-in');\n\nmodule.exports = getBuiltIn('navigator', 'userAgent') || '';\n","var global = require('../internals/global');\nvar userAgent = require('../internals/engine-user-agent');\n\nvar process = global.process;\nvar versions = process && process.versions;\nvar v8 = versions && versions.v8;\nvar match, version;\n\nif (v8) {\n match = v8.split('.');\n version = match[0] + match[1];\n} else if (userAgent) {\n match = userAgent.match(/Edge\\/(\\d+)/);\n if (!match || match[1] >= 74) {\n match = userAgent.match(/Chrome\\/(\\d+)/);\n if (match) version = match[1];\n }\n}\n\nmodule.exports = version && +version;\n","// IE8- don't enum bug keys\nmodule.exports = [\n 'constructor',\n 'hasOwnProperty',\n 'isPrototypeOf',\n 'propertyIsEnumerable',\n 'toLocaleString',\n 'toString',\n 'valueOf'\n];\n","var global = require('../internals/global');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar setGlobal = require('../internals/set-global');\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\nvar isForced = require('../internals/is-forced');\n\n/*\n options.target - name of the target object\n options.global - target is the global object\n options.stat - export as static methods of target\n options.proto - export as prototype methods of target\n options.real - real prototype method for the `pure` version\n options.forced - export even if the native feature is available\n options.bind - bind methods to the target, required for the `pure` version\n options.wrap - wrap constructors to preventing global pollution, required for the `pure` version\n options.unsafe - use the simple assignment of property instead of delete + defineProperty\n options.sham - add a flag to not completely full polyfills\n options.enumerable - export as enumerable property\n options.noTargetGet - prevent calling a getter on target\n*/\nmodule.exports = function (options, source) {\n var TARGET = options.target;\n var GLOBAL = options.global;\n var STATIC = options.stat;\n var FORCED, target, key, targetProperty, sourceProperty, descriptor;\n if (GLOBAL) {\n target = global;\n } else if (STATIC) {\n target = global[TARGET] || setGlobal(TARGET, {});\n } else {\n target = (global[TARGET] || {}).prototype;\n }\n if (target) for (key in source) {\n sourceProperty = source[key];\n if (options.noTargetGet) {\n descriptor = getOwnPropertyDescriptor(target, key);\n targetProperty = descriptor && descriptor.value;\n } else targetProperty = target[key];\n FORCED = isForced(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);\n // contained in target\n if (!FORCED && targetProperty !== undefined) {\n if (typeof sourceProperty === typeof targetProperty) continue;\n copyConstructorProperties(sourceProperty, targetProperty);\n }\n // add a flag to not completely full polyfills\n if (options.sham || (targetProperty && targetProperty.sham)) {\n createNonEnumerableProperty(sourceProperty, 'sham', true);\n }\n // extend global\n redefine(target, key, sourceProperty, options);\n }\n};\n","module.exports = function (exec) {\n try {\n return !!exec();\n } catch (error) {\n return true;\n }\n};\n","'use strict';\n// TODO: Remove from `core-js@4` since it's moved to entry points\nrequire('../modules/es.regexp.exec');\nvar redefine = require('../internals/redefine');\nvar fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nvar SPECIES = wellKnownSymbol('species');\n\nvar REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {\n // #replace needs built-in support for named groups.\n // #match works fine because it just return the exec results, even if it has\n // a \"grops\" property.\n var re = /./;\n re.exec = function () {\n var result = [];\n result.groups = { a: '7' };\n return result;\n };\n return ''.replace(re, '$') !== '7';\n});\n\n// IE <= 11 replaces $0 with the whole match, as if it was $&\n// https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0\nvar REPLACE_KEEPS_$0 = (function () {\n // eslint-disable-next-line regexp/prefer-escape-replacement-dollar-char -- required for testing\n return 'a'.replace(/./, '$0') === '$0';\n})();\n\nvar REPLACE = wellKnownSymbol('replace');\n// Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string\nvar REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {\n if (/./[REPLACE]) {\n return /./[REPLACE]('a', '$0') === '';\n }\n return false;\n})();\n\n// Chrome 51 has a buggy \"split\" implementation when RegExp#exec !== nativeExec\n// Weex JS has frozen built-in prototypes, so use try / catch wrapper\nvar SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(function () {\n // eslint-disable-next-line regexp/no-empty-group -- required for testing\n var re = /(?:)/;\n var originalExec = re.exec;\n re.exec = function () { return originalExec.apply(this, arguments); };\n var result = 'ab'.split(re);\n return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';\n});\n\nmodule.exports = function (KEY, length, exec, sham) {\n var SYMBOL = wellKnownSymbol(KEY);\n\n var DELEGATES_TO_SYMBOL = !fails(function () {\n // String methods call symbol-named RegEp methods\n var O = {};\n O[SYMBOL] = function () { return 7; };\n return ''[KEY](O) != 7;\n });\n\n var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {\n // Symbol-named RegExp methods call .exec\n var execCalled = false;\n var re = /a/;\n\n if (KEY === 'split') {\n // We can't use real regex here since it causes deoptimization\n // and serious performance degradation in V8\n // https://github.com/zloirock/core-js/issues/306\n re = {};\n // RegExp[@@split] doesn't call the regex's exec method, but first creates\n // a new one. We need to return the patched regex when creating the new one.\n re.constructor = {};\n re.constructor[SPECIES] = function () { return re; };\n re.flags = '';\n re[SYMBOL] = /./[SYMBOL];\n }\n\n re.exec = function () { execCalled = true; return null; };\n\n re[SYMBOL]('');\n return !execCalled;\n });\n\n if (\n !DELEGATES_TO_SYMBOL ||\n !DELEGATES_TO_EXEC ||\n (KEY === 'replace' && !(\n REPLACE_SUPPORTS_NAMED_GROUPS &&\n REPLACE_KEEPS_$0 &&\n !REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE\n )) ||\n (KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)\n ) {\n var nativeRegExpMethod = /./[SYMBOL];\n var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {\n if (regexp.exec === RegExp.prototype.exec) {\n if (DELEGATES_TO_SYMBOL && !forceStringMethod) {\n // The native String method already delegates to @@method (this\n // polyfilled function), leasing to infinite recursion.\n // We avoid it by directly calling the native @@method method.\n return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };\n }\n return { done: true, value: nativeMethod.call(str, regexp, arg2) };\n }\n return { done: false };\n }, {\n REPLACE_KEEPS_$0: REPLACE_KEEPS_$0,\n REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE: REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE\n });\n var stringMethod = methods[0];\n var regexMethod = methods[1];\n\n redefine(String.prototype, KEY, stringMethod);\n redefine(RegExp.prototype, SYMBOL, length == 2\n // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)\n // 21.2.5.11 RegExp.prototype[@@split](string, limit)\n ? function (string, arg) { return regexMethod.call(string, this, arg); }\n // 21.2.5.6 RegExp.prototype[@@match](string)\n // 21.2.5.9 RegExp.prototype[@@search](string)\n : function (string) { return regexMethod.call(string, this); }\n );\n }\n\n if (sham) createNonEnumerableProperty(RegExp.prototype[SYMBOL], 'sham', true);\n};\n","'use strict';\nvar isArray = require('../internals/is-array');\nvar toLength = require('../internals/to-length');\nvar bind = require('../internals/function-bind-context');\n\n// `FlattenIntoArray` abstract operation\n// https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray\nvar flattenIntoArray = function (target, original, source, sourceLen, start, depth, mapper, thisArg) {\n var targetIndex = start;\n var sourceIndex = 0;\n var mapFn = mapper ? bind(mapper, thisArg, 3) : false;\n var element;\n\n while (sourceIndex < sourceLen) {\n if (sourceIndex in source) {\n element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];\n\n if (depth > 0 && isArray(element)) {\n targetIndex = flattenIntoArray(target, original, element, toLength(element.length), targetIndex, depth - 1) - 1;\n } else {\n if (targetIndex >= 0x1FFFFFFFFFFFFF) throw TypeError('Exceed the acceptable array length');\n target[targetIndex] = element;\n }\n\n targetIndex++;\n }\n sourceIndex++;\n }\n return targetIndex;\n};\n\nmodule.exports = flattenIntoArray;\n","var aFunction = require('../internals/a-function');\n\n// optional / simple context binding\nmodule.exports = function (fn, that, length) {\n aFunction(fn);\n if (that === undefined) return fn;\n switch (length) {\n case 0: return function () {\n return fn.call(that);\n };\n case 1: return function (a) {\n return fn.call(that, a);\n };\n case 2: return function (a, b) {\n return fn.call(that, a, b);\n };\n case 3: return function (a, b, c) {\n return fn.call(that, a, b, c);\n };\n }\n return function (/* ...args */) {\n return fn.apply(that, arguments);\n };\n};\n","var path = require('../internals/path');\nvar global = require('../internals/global');\n\nvar aFunction = function (variable) {\n return typeof variable == 'function' ? variable : undefined;\n};\n\nmodule.exports = function (namespace, method) {\n return arguments.length < 2 ? aFunction(path[namespace]) || aFunction(global[namespace])\n : path[namespace] && path[namespace][method] || global[namespace] && global[namespace][method];\n};\n","var classof = require('../internals/classof');\nvar Iterators = require('../internals/iterators');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\n\nmodule.exports = function (it) {\n if (it != undefined) return it[ITERATOR]\n || it['@@iterator']\n || Iterators[classof(it)];\n};\n","var anObject = require('../internals/an-object');\nvar getIteratorMethod = require('../internals/get-iterator-method');\n\nmodule.exports = function (it) {\n var iteratorMethod = getIteratorMethod(it);\n if (typeof iteratorMethod != 'function') {\n throw TypeError(String(it) + ' is not iterable');\n } return anObject(iteratorMethod.call(it));\n};\n","var toObject = require('../internals/to-object');\n\nvar floor = Math.floor;\nvar replace = ''.replace;\nvar SUBSTITUTION_SYMBOLS = /\\$([$&'`]|\\d{1,2}|<[^>]*>)/g;\nvar SUBSTITUTION_SYMBOLS_NO_NAMED = /\\$([$&'`]|\\d{1,2})/g;\n\n// https://tc39.es/ecma262/#sec-getsubstitution\nmodule.exports = function (matched, str, position, captures, namedCaptures, replacement) {\n var tailPos = position + matched.length;\n var m = captures.length;\n var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;\n if (namedCaptures !== undefined) {\n namedCaptures = toObject(namedCaptures);\n symbols = SUBSTITUTION_SYMBOLS;\n }\n return replace.call(replacement, symbols, function (match, ch) {\n var capture;\n switch (ch.charAt(0)) {\n case '$': return '$';\n case '&': return matched;\n case '`': return str.slice(0, position);\n case \"'\": return str.slice(tailPos);\n case '<':\n capture = namedCaptures[ch.slice(1, -1)];\n break;\n default: // \\d\\d?\n var n = +ch;\n if (n === 0) return match;\n if (n > m) {\n var f = floor(n / 10);\n if (f === 0) return match;\n if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);\n return match;\n }\n capture = captures[n - 1];\n }\n return capture === undefined ? '' : capture;\n });\n};\n","var check = function (it) {\n return it && it.Math == Math && it;\n};\n\n// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028\nmodule.exports =\n // eslint-disable-next-line es/no-global-this -- safe\n check(typeof globalThis == 'object' && globalThis) ||\n check(typeof window == 'object' && window) ||\n // eslint-disable-next-line no-restricted-globals -- safe\n check(typeof self == 'object' && self) ||\n check(typeof global == 'object' && global) ||\n // eslint-disable-next-line no-new-func -- fallback\n (function () { return this; })() || Function('return this')();\n","var toObject = require('../internals/to-object');\n\nvar hasOwnProperty = {}.hasOwnProperty;\n\nmodule.exports = function hasOwn(it, key) {\n return hasOwnProperty.call(toObject(it), key);\n};\n","module.exports = {};\n","var global = require('../internals/global');\n\nmodule.exports = function (a, b) {\n var console = global.console;\n if (console && console.error) {\n arguments.length === 1 ? console.error(a) : console.error(a, b);\n }\n};\n","var getBuiltIn = require('../internals/get-built-in');\n\nmodule.exports = getBuiltIn('document', 'documentElement');\n","var DESCRIPTORS = require('../internals/descriptors');\nvar fails = require('../internals/fails');\nvar createElement = require('../internals/document-create-element');\n\n// Thank's IE8 for his funny defineProperty\nmodule.exports = !DESCRIPTORS && !fails(function () {\n // eslint-disable-next-line es/no-object-defineproperty -- requied for testing\n return Object.defineProperty(createElement('div'), 'a', {\n get: function () { return 7; }\n }).a != 7;\n});\n","var fails = require('../internals/fails');\nvar classof = require('../internals/classof-raw');\n\nvar split = ''.split;\n\n// fallback for non-array-like ES3 and non-enumerable old V8 strings\nmodule.exports = fails(function () {\n // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346\n // eslint-disable-next-line no-prototype-builtins -- safe\n return !Object('z').propertyIsEnumerable(0);\n}) ? function (it) {\n return classof(it) == 'String' ? split.call(it, '') : Object(it);\n} : Object;\n","var store = require('../internals/shared-store');\n\nvar functionToString = Function.toString;\n\n// this helper broken in `3.4.1-3.4.4`, so we can't use `shared` helper\nif (typeof store.inspectSource != 'function') {\n store.inspectSource = function (it) {\n return functionToString.call(it);\n };\n}\n\nmodule.exports = store.inspectSource;\n","var NATIVE_WEAK_MAP = require('../internals/native-weak-map');\nvar global = require('../internals/global');\nvar isObject = require('../internals/is-object');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar objectHas = require('../internals/has');\nvar shared = require('../internals/shared-store');\nvar sharedKey = require('../internals/shared-key');\nvar hiddenKeys = require('../internals/hidden-keys');\n\nvar OBJECT_ALREADY_INITIALIZED = 'Object already initialized';\nvar WeakMap = global.WeakMap;\nvar set, get, has;\n\nvar enforce = function (it) {\n return has(it) ? get(it) : set(it, {});\n};\n\nvar getterFor = function (TYPE) {\n return function (it) {\n var state;\n if (!isObject(it) || (state = get(it)).type !== TYPE) {\n throw TypeError('Incompatible receiver, ' + TYPE + ' required');\n } return state;\n };\n};\n\nif (NATIVE_WEAK_MAP) {\n var store = shared.state || (shared.state = new WeakMap());\n var wmget = store.get;\n var wmhas = store.has;\n var wmset = store.set;\n set = function (it, metadata) {\n if (wmhas.call(store, it)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);\n metadata.facade = it;\n wmset.call(store, it, metadata);\n return metadata;\n };\n get = function (it) {\n return wmget.call(store, it) || {};\n };\n has = function (it) {\n return wmhas.call(store, it);\n };\n} else {\n var STATE = sharedKey('state');\n hiddenKeys[STATE] = true;\n set = function (it, metadata) {\n if (objectHas(it, STATE)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);\n metadata.facade = it;\n createNonEnumerableProperty(it, STATE, metadata);\n return metadata;\n };\n get = function (it) {\n return objectHas(it, STATE) ? it[STATE] : {};\n };\n has = function (it) {\n return objectHas(it, STATE);\n };\n}\n\nmodule.exports = {\n set: set,\n get: get,\n has: has,\n enforce: enforce,\n getterFor: getterFor\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\nvar Iterators = require('../internals/iterators');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar ArrayPrototype = Array.prototype;\n\n// check on default Array iterator\nmodule.exports = function (it) {\n return it !== undefined && (Iterators.Array === it || ArrayPrototype[ITERATOR] === it);\n};\n","var classof = require('../internals/classof-raw');\n\n// `IsArray` abstract operation\n// https://tc39.es/ecma262/#sec-isarray\n// eslint-disable-next-line es/no-array-isarray -- safe\nmodule.exports = Array.isArray || function isArray(arg) {\n return classof(arg) == 'Array';\n};\n","var fails = require('../internals/fails');\n\nvar replacement = /#|\\.prototype\\./;\n\nvar isForced = function (feature, detection) {\n var value = data[normalize(feature)];\n return value == POLYFILL ? true\n : value == NATIVE ? false\n : typeof detection == 'function' ? fails(detection)\n : !!detection;\n};\n\nvar normalize = isForced.normalize = function (string) {\n return String(string).replace(replacement, '.').toLowerCase();\n};\n\nvar data = isForced.data = {};\nvar NATIVE = isForced.NATIVE = 'N';\nvar POLYFILL = isForced.POLYFILL = 'P';\n\nmodule.exports = isForced;\n","module.exports = function (it) {\n return typeof it === 'object' ? it !== null : typeof it === 'function';\n};\n","module.exports = false;\n","var isObject = require('../internals/is-object');\nvar classof = require('../internals/classof-raw');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\n// `IsRegExp` abstract operation\n// https://tc39.es/ecma262/#sec-isregexp\nmodule.exports = function (it) {\n var isRegExp;\n return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : classof(it) == 'RegExp');\n};\n","var anObject = require('../internals/an-object');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar toLength = require('../internals/to-length');\nvar bind = require('../internals/function-bind-context');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar iteratorClose = require('../internals/iterator-close');\n\nvar Result = function (stopped, result) {\n this.stopped = stopped;\n this.result = result;\n};\n\nmodule.exports = function (iterable, unboundFunction, options) {\n var that = options && options.that;\n var AS_ENTRIES = !!(options && options.AS_ENTRIES);\n var IS_ITERATOR = !!(options && options.IS_ITERATOR);\n var INTERRUPTED = !!(options && options.INTERRUPTED);\n var fn = bind(unboundFunction, that, 1 + AS_ENTRIES + INTERRUPTED);\n var iterator, iterFn, index, length, result, next, step;\n\n var stop = function (condition) {\n if (iterator) iteratorClose(iterator);\n return new Result(true, condition);\n };\n\n var callFn = function (value) {\n if (AS_ENTRIES) {\n anObject(value);\n return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);\n } return INTERRUPTED ? fn(value, stop) : fn(value);\n };\n\n if (IS_ITERATOR) {\n iterator = iterable;\n } else {\n iterFn = getIteratorMethod(iterable);\n if (typeof iterFn != 'function') throw TypeError('Target is not iterable');\n // optimisation for array iterators\n if (isArrayIteratorMethod(iterFn)) {\n for (index = 0, length = toLength(iterable.length); length > index; index++) {\n result = callFn(iterable[index]);\n if (result && result instanceof Result) return result;\n } return new Result(false);\n }\n iterator = iterFn.call(iterable);\n }\n\n next = iterator.next;\n while (!(step = next.call(iterator)).done) {\n try {\n result = callFn(step.value);\n } catch (error) {\n iteratorClose(iterator);\n throw error;\n }\n if (typeof result == 'object' && result && result instanceof Result) return result;\n } return new Result(false);\n};\n","var anObject = require('../internals/an-object');\n\nmodule.exports = function (iterator) {\n var returnMethod = iterator['return'];\n if (returnMethod !== undefined) {\n return anObject(returnMethod.call(iterator)).value;\n }\n};\n","'use strict';\nvar fails = require('../internals/fails');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar has = require('../internals/has');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar BUGGY_SAFARI_ITERATORS = false;\n\nvar returnThis = function () { return this; };\n\n// `%IteratorPrototype%` object\n// https://tc39.es/ecma262/#sec-%iteratorprototype%-object\nvar IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;\n\n/* eslint-disable es/no-array-prototype-keys -- safe */\nif ([].keys) {\n arrayIterator = [].keys();\n // Safari 8 has buggy iterators w/o `next`\n if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS = true;\n else {\n PrototypeOfArrayIteratorPrototype = getPrototypeOf(getPrototypeOf(arrayIterator));\n if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype = PrototypeOfArrayIteratorPrototype;\n }\n}\n\nvar NEW_ITERATOR_PROTOTYPE = IteratorPrototype == undefined || fails(function () {\n var test = {};\n // FF44- legacy iterators case\n return IteratorPrototype[ITERATOR].call(test) !== test;\n});\n\nif (NEW_ITERATOR_PROTOTYPE) IteratorPrototype = {};\n\n// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()\nif ((!IS_PURE || NEW_ITERATOR_PROTOTYPE) && !has(IteratorPrototype, ITERATOR)) {\n createNonEnumerableProperty(IteratorPrototype, ITERATOR, returnThis);\n}\n\nmodule.exports = {\n IteratorPrototype: IteratorPrototype,\n BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS\n};\n","module.exports = {};\n","var global = require('../internals/global');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar macrotask = require('../internals/task').set;\nvar IS_IOS = require('../internals/engine-is-ios');\nvar IS_WEBOS_WEBKIT = require('../internals/engine-is-webos-webkit');\nvar IS_NODE = require('../internals/engine-is-node');\n\nvar MutationObserver = global.MutationObserver || global.WebKitMutationObserver;\nvar document = global.document;\nvar process = global.process;\nvar Promise = global.Promise;\n// Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`\nvar queueMicrotaskDescriptor = getOwnPropertyDescriptor(global, 'queueMicrotask');\nvar queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;\n\nvar flush, head, last, notify, toggle, node, promise, then;\n\n// modern engines have queueMicrotask method\nif (!queueMicrotask) {\n flush = function () {\n var parent, fn;\n if (IS_NODE && (parent = process.domain)) parent.exit();\n while (head) {\n fn = head.fn;\n head = head.next;\n try {\n fn();\n } catch (error) {\n if (head) notify();\n else last = undefined;\n throw error;\n }\n } last = undefined;\n if (parent) parent.enter();\n };\n\n // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339\n // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898\n if (!IS_IOS && !IS_NODE && !IS_WEBOS_WEBKIT && MutationObserver && document) {\n toggle = true;\n node = document.createTextNode('');\n new MutationObserver(flush).observe(node, { characterData: true });\n notify = function () {\n node.data = toggle = !toggle;\n };\n // environments with maybe non-completely correct, but existent Promise\n } else if (Promise && Promise.resolve) {\n // Promise.resolve without an argument throws an error in LG WebOS 2\n promise = Promise.resolve(undefined);\n then = promise.then;\n notify = function () {\n then.call(promise, flush);\n };\n // Node.js without promises\n } else if (IS_NODE) {\n notify = function () {\n process.nextTick(flush);\n };\n // for other environments - macrotask based on:\n // - setImmediate\n // - MessageChannel\n // - window.postMessag\n // - onreadystatechange\n // - setTimeout\n } else {\n notify = function () {\n // strange IE + webpack dev server bug - use .call(global)\n macrotask.call(global, flush);\n };\n }\n}\n\nmodule.exports = queueMicrotask || function (fn) {\n var task = { fn: fn, next: undefined };\n if (last) last.next = task;\n if (!head) {\n head = task;\n notify();\n } last = task;\n};\n","var global = require('../internals/global');\n\nmodule.exports = global.Promise;\n","var IS_NODE = require('../internals/engine-is-node');\nvar V8_VERSION = require('../internals/engine-v8-version');\nvar fails = require('../internals/fails');\n\n// eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing\nmodule.exports = !!Object.getOwnPropertySymbols && !fails(function () {\n // eslint-disable-next-line es/no-symbol -- required for testing\n return !Symbol.sham &&\n // Chrome 38 Symbol has incorrect toString conversion\n // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances\n (IS_NODE ? V8_VERSION === 38 : V8_VERSION > 37 && V8_VERSION < 41);\n});\n","var fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\n\nvar ITERATOR = wellKnownSymbol('iterator');\n\nmodule.exports = !fails(function () {\n var url = new URL('b?a=1&b=2&c=3', 'http://a');\n var searchParams = url.searchParams;\n var result = '';\n url.pathname = 'c%20d';\n searchParams.forEach(function (value, key) {\n searchParams['delete']('b');\n result += key + value;\n });\n return (IS_PURE && !url.toJSON)\n || !searchParams.sort\n || url.href !== 'http://a/c%20d?a=1&c=3'\n || searchParams.get('c') !== '3'\n || String(new URLSearchParams('?a=1')) !== 'a=1'\n || !searchParams[ITERATOR]\n // throws in Edge\n || new URL('https://a@b').username !== 'a'\n || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'\n // not punycoded in Edge\n || new URL('http://тест').host !== 'xn--e1aybc'\n // not escaped in Chrome 62-\n || new URL('http://a#б').hash !== '#%D0%B1'\n // fails in Chrome 66-\n || result !== 'a1c3'\n // throws in Safari\n || new URL('http://x', undefined).host !== 'x';\n});\n","var global = require('../internals/global');\nvar inspectSource = require('../internals/inspect-source');\n\nvar WeakMap = global.WeakMap;\n\nmodule.exports = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));\n","'use strict';\nvar aFunction = require('../internals/a-function');\n\nvar PromiseCapability = function (C) {\n var resolve, reject;\n this.promise = new C(function ($$resolve, $$reject) {\n if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');\n resolve = $$resolve;\n reject = $$reject;\n });\n this.resolve = aFunction(resolve);\n this.reject = aFunction(reject);\n};\n\n// 25.4.1.5 NewPromiseCapability(C)\nmodule.exports.f = function (C) {\n return new PromiseCapability(C);\n};\n","var isRegExp = require('../internals/is-regexp');\n\nmodule.exports = function (it) {\n if (isRegExp(it)) {\n throw TypeError(\"The method doesn't accept regular expressions\");\n } return it;\n};\n","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar fails = require('../internals/fails');\nvar objectKeys = require('../internals/object-keys');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar toObject = require('../internals/to-object');\nvar IndexedObject = require('../internals/indexed-object');\n\n// eslint-disable-next-line es/no-object-assign -- safe\nvar $assign = Object.assign;\n// eslint-disable-next-line es/no-object-defineproperty -- required for testing\nvar defineProperty = Object.defineProperty;\n\n// `Object.assign` method\n// https://tc39.es/ecma262/#sec-object.assign\nmodule.exports = !$assign || fails(function () {\n // should have correct order of operations (Edge bug)\n if (DESCRIPTORS && $assign({ b: 1 }, $assign(defineProperty({}, 'a', {\n enumerable: true,\n get: function () {\n defineProperty(this, 'b', {\n value: 3,\n enumerable: false\n });\n }\n }), { b: 2 })).b !== 1) return true;\n // should work with symbols and should have deterministic property order (V8 bug)\n var A = {};\n var B = {};\n // eslint-disable-next-line es/no-symbol -- safe\n var symbol = Symbol();\n var alphabet = 'abcdefghijklmnopqrst';\n A[symbol] = 7;\n alphabet.split('').forEach(function (chr) { B[chr] = chr; });\n return $assign({}, A)[symbol] != 7 || objectKeys($assign({}, B)).join('') != alphabet;\n}) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`\n var T = toObject(target);\n var argumentsLength = arguments.length;\n var index = 1;\n var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;\n var propertyIsEnumerable = propertyIsEnumerableModule.f;\n while (argumentsLength > index) {\n var S = IndexedObject(arguments[index++]);\n var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);\n var length = keys.length;\n var j = 0;\n var key;\n while (length > j) {\n key = keys[j++];\n if (!DESCRIPTORS || propertyIsEnumerable.call(S, key)) T[key] = S[key];\n }\n } return T;\n} : $assign;\n","var anObject = require('../internals/an-object');\nvar defineProperties = require('../internals/object-define-properties');\nvar enumBugKeys = require('../internals/enum-bug-keys');\nvar hiddenKeys = require('../internals/hidden-keys');\nvar html = require('../internals/html');\nvar documentCreateElement = require('../internals/document-create-element');\nvar sharedKey = require('../internals/shared-key');\n\nvar GT = '>';\nvar LT = '<';\nvar PROTOTYPE = 'prototype';\nvar SCRIPT = 'script';\nvar IE_PROTO = sharedKey('IE_PROTO');\n\nvar EmptyConstructor = function () { /* empty */ };\n\nvar scriptTag = function (content) {\n return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;\n};\n\n// Create object with fake `null` prototype: use ActiveX Object with cleared prototype\nvar NullProtoObjectViaActiveX = function (activeXDocument) {\n activeXDocument.write(scriptTag(''));\n activeXDocument.close();\n var temp = activeXDocument.parentWindow.Object;\n activeXDocument = null; // avoid memory leak\n return temp;\n};\n\n// Create object with fake `null` prototype: use iframe Object with cleared prototype\nvar NullProtoObjectViaIFrame = function () {\n // Thrash, waste and sodomy: IE GC bug\n var iframe = documentCreateElement('iframe');\n var JS = 'java' + SCRIPT + ':';\n var iframeDocument;\n iframe.style.display = 'none';\n html.appendChild(iframe);\n // https://github.com/zloirock/core-js/issues/475\n iframe.src = String(JS);\n iframeDocument = iframe.contentWindow.document;\n iframeDocument.open();\n iframeDocument.write(scriptTag('document.F=Object'));\n iframeDocument.close();\n return iframeDocument.F;\n};\n\n// Check for document.domain and active x support\n// No need to use active x approach when document.domain is not set\n// see https://github.com/es-shims/es5-shim/issues/150\n// variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346\n// avoid IE GC bug\nvar activeXDocument;\nvar NullProtoObject = function () {\n try {\n /* global ActiveXObject -- old IE */\n activeXDocument = document.domain && new ActiveXObject('htmlfile');\n } catch (error) { /* ignore */ }\n NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();\n var length = enumBugKeys.length;\n while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];\n return NullProtoObject();\n};\n\nhiddenKeys[IE_PROTO] = true;\n\n// `Object.create` method\n// https://tc39.es/ecma262/#sec-object.create\nmodule.exports = Object.create || function create(O, Properties) {\n var result;\n if (O !== null) {\n EmptyConstructor[PROTOTYPE] = anObject(O);\n result = new EmptyConstructor();\n EmptyConstructor[PROTOTYPE] = null;\n // add \"__proto__\" for Object.getPrototypeOf polyfill\n result[IE_PROTO] = O;\n } else result = NullProtoObject();\n return Properties === undefined ? result : defineProperties(result, Properties);\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar definePropertyModule = require('../internals/object-define-property');\nvar anObject = require('../internals/an-object');\nvar objectKeys = require('../internals/object-keys');\n\n// `Object.defineProperties` method\n// https://tc39.es/ecma262/#sec-object.defineproperties\n// eslint-disable-next-line es/no-object-defineproperties -- safe\nmodule.exports = DESCRIPTORS ? Object.defineProperties : function defineProperties(O, Properties) {\n anObject(O);\n var keys = objectKeys(Properties);\n var length = keys.length;\n var index = 0;\n var key;\n while (length > index) definePropertyModule.f(O, key = keys[index++], Properties[key]);\n return O;\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar IE8_DOM_DEFINE = require('../internals/ie8-dom-define');\nvar anObject = require('../internals/an-object');\nvar toPrimitive = require('../internals/to-primitive');\n\n// eslint-disable-next-line es/no-object-defineproperty -- safe\nvar $defineProperty = Object.defineProperty;\n\n// `Object.defineProperty` method\n// https://tc39.es/ecma262/#sec-object.defineproperty\nexports.f = DESCRIPTORS ? $defineProperty : function defineProperty(O, P, Attributes) {\n anObject(O);\n P = toPrimitive(P, true);\n anObject(Attributes);\n if (IE8_DOM_DEFINE) try {\n return $defineProperty(O, P, Attributes);\n } catch (error) { /* empty */ }\n if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');\n if ('value' in Attributes) O[P] = Attributes.value;\n return O;\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar has = require('../internals/has');\nvar IE8_DOM_DEFINE = require('../internals/ie8-dom-define');\n\n// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe\nvar $getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n\n// `Object.getOwnPropertyDescriptor` method\n// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor\nexports.f = DESCRIPTORS ? $getOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {\n O = toIndexedObject(O);\n P = toPrimitive(P, true);\n if (IE8_DOM_DEFINE) try {\n return $getOwnPropertyDescriptor(O, P);\n } catch (error) { /* empty */ }\n if (has(O, P)) return createPropertyDescriptor(!propertyIsEnumerableModule.f.call(O, P), O[P]);\n};\n","/* eslint-disable es/no-object-getownpropertynames -- safe */\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar $getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\n\nvar toString = {}.toString;\n\nvar windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames\n ? Object.getOwnPropertyNames(window) : [];\n\nvar getWindowNames = function (it) {\n try {\n return $getOwnPropertyNames(it);\n } catch (error) {\n return windowNames.slice();\n }\n};\n\n// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window\nmodule.exports.f = function getOwnPropertyNames(it) {\n return windowNames && toString.call(it) == '[object Window]'\n ? getWindowNames(it)\n : $getOwnPropertyNames(toIndexedObject(it));\n};\n","var internalObjectKeys = require('../internals/object-keys-internal');\nvar enumBugKeys = require('../internals/enum-bug-keys');\n\nvar hiddenKeys = enumBugKeys.concat('length', 'prototype');\n\n// `Object.getOwnPropertyNames` method\n// https://tc39.es/ecma262/#sec-object.getownpropertynames\n// eslint-disable-next-line es/no-object-getownpropertynames -- safe\nexports.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {\n return internalObjectKeys(O, hiddenKeys);\n};\n","// eslint-disable-next-line es/no-object-getownpropertysymbols -- safe\nexports.f = Object.getOwnPropertySymbols;\n","var has = require('../internals/has');\nvar toObject = require('../internals/to-object');\nvar sharedKey = require('../internals/shared-key');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\nvar IE_PROTO = sharedKey('IE_PROTO');\nvar ObjectPrototype = Object.prototype;\n\n// `Object.getPrototypeOf` method\n// https://tc39.es/ecma262/#sec-object.getprototypeof\n// eslint-disable-next-line es/no-object-getprototypeof -- safe\nmodule.exports = CORRECT_PROTOTYPE_GETTER ? Object.getPrototypeOf : function (O) {\n O = toObject(O);\n if (has(O, IE_PROTO)) return O[IE_PROTO];\n if (typeof O.constructor == 'function' && O instanceof O.constructor) {\n return O.constructor.prototype;\n } return O instanceof Object ? ObjectPrototype : null;\n};\n","var has = require('../internals/has');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar indexOf = require('../internals/array-includes').indexOf;\nvar hiddenKeys = require('../internals/hidden-keys');\n\nmodule.exports = function (object, names) {\n var O = toIndexedObject(object);\n var i = 0;\n var result = [];\n var key;\n for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);\n // Don't enum bug & hidden keys\n while (names.length > i) if (has(O, key = names[i++])) {\n ~indexOf(result, key) || result.push(key);\n }\n return result;\n};\n","var internalObjectKeys = require('../internals/object-keys-internal');\nvar enumBugKeys = require('../internals/enum-bug-keys');\n\n// `Object.keys` method\n// https://tc39.es/ecma262/#sec-object.keys\n// eslint-disable-next-line es/no-object-keys -- safe\nmodule.exports = Object.keys || function keys(O) {\n return internalObjectKeys(O, enumBugKeys);\n};\n","'use strict';\nvar $propertyIsEnumerable = {}.propertyIsEnumerable;\n// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe\nvar getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n\n// Nashorn ~ JDK8 bug\nvar NASHORN_BUG = getOwnPropertyDescriptor && !$propertyIsEnumerable.call({ 1: 2 }, 1);\n\n// `Object.prototype.propertyIsEnumerable` method implementation\n// https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable\nexports.f = NASHORN_BUG ? function propertyIsEnumerable(V) {\n var descriptor = getOwnPropertyDescriptor(this, V);\n return !!descriptor && descriptor.enumerable;\n} : $propertyIsEnumerable;\n","/* eslint-disable no-proto -- safe */\nvar anObject = require('../internals/an-object');\nvar aPossiblePrototype = require('../internals/a-possible-prototype');\n\n// `Object.setPrototypeOf` method\n// https://tc39.es/ecma262/#sec-object.setprototypeof\n// Works with __proto__ only. Old v8 can't work with null proto objects.\n// eslint-disable-next-line es/no-object-setprototypeof -- safe\nmodule.exports = Object.setPrototypeOf || ('__proto__' in {} ? function () {\n var CORRECT_SETTER = false;\n var test = {};\n var setter;\n try {\n // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe\n setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;\n setter.call(test, []);\n CORRECT_SETTER = test instanceof Array;\n } catch (error) { /* empty */ }\n return function setPrototypeOf(O, proto) {\n anObject(O);\n aPossiblePrototype(proto);\n if (CORRECT_SETTER) setter.call(O, proto);\n else O.__proto__ = proto;\n return O;\n };\n}() : undefined);\n","'use strict';\nvar TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar classof = require('../internals/classof');\n\n// `Object.prototype.toString` method implementation\n// https://tc39.es/ecma262/#sec-object.prototype.tostring\nmodule.exports = TO_STRING_TAG_SUPPORT ? {}.toString : function toString() {\n return '[object ' + classof(this) + ']';\n};\n","var getBuiltIn = require('../internals/get-built-in');\nvar getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar anObject = require('../internals/an-object');\n\n// all object keys, includes non-enumerable and symbols\nmodule.exports = getBuiltIn('Reflect', 'ownKeys') || function ownKeys(it) {\n var keys = getOwnPropertyNamesModule.f(anObject(it));\n var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;\n return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;\n};\n","var global = require('../internals/global');\n\nmodule.exports = global;\n","module.exports = function (exec) {\n try {\n return { error: false, value: exec() };\n } catch (error) {\n return { error: true, value: error };\n }\n};\n","var anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar newPromiseCapability = require('../internals/new-promise-capability');\n\nmodule.exports = function (C, x) {\n anObject(C);\n if (isObject(x) && x.constructor === C) return x;\n var promiseCapability = newPromiseCapability.f(C);\n var resolve = promiseCapability.resolve;\n resolve(x);\n return promiseCapability.promise;\n};\n","var redefine = require('../internals/redefine');\n\nmodule.exports = function (target, src, options) {\n for (var key in src) redefine(target, key, src[key], options);\n return target;\n};\n","var global = require('../internals/global');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar has = require('../internals/has');\nvar setGlobal = require('../internals/set-global');\nvar inspectSource = require('../internals/inspect-source');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar getInternalState = InternalStateModule.get;\nvar enforceInternalState = InternalStateModule.enforce;\nvar TEMPLATE = String(String).split('String');\n\n(module.exports = function (O, key, value, options) {\n var unsafe = options ? !!options.unsafe : false;\n var simple = options ? !!options.enumerable : false;\n var noTargetGet = options ? !!options.noTargetGet : false;\n var state;\n if (typeof value == 'function') {\n if (typeof key == 'string' && !has(value, 'name')) {\n createNonEnumerableProperty(value, 'name', key);\n }\n state = enforceInternalState(value);\n if (!state.source) {\n state.source = TEMPLATE.join(typeof key == 'string' ? key : '');\n }\n }\n if (O === global) {\n if (simple) O[key] = value;\n else setGlobal(key, value);\n return;\n } else if (!unsafe) {\n delete O[key];\n } else if (!noTargetGet && O[key]) {\n simple = true;\n }\n if (simple) O[key] = value;\n else createNonEnumerableProperty(O, key, value);\n// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative\n})(Function.prototype, 'toString', function toString() {\n return typeof this == 'function' && getInternalState(this).source || inspectSource(this);\n});\n","var classof = require('./classof-raw');\nvar regexpExec = require('./regexp-exec');\n\n// `RegExpExec` abstract operation\n// https://tc39.es/ecma262/#sec-regexpexec\nmodule.exports = function (R, S) {\n var exec = R.exec;\n if (typeof exec === 'function') {\n var result = exec.call(R, S);\n if (typeof result !== 'object') {\n throw TypeError('RegExp exec method returned something other than an Object or null');\n }\n return result;\n }\n\n if (classof(R) !== 'RegExp') {\n throw TypeError('RegExp#exec called on incompatible receiver');\n }\n\n return regexpExec.call(R, S);\n};\n\n","'use strict';\nvar regexpFlags = require('./regexp-flags');\nvar stickyHelpers = require('./regexp-sticky-helpers');\nvar shared = require('./shared');\n\nvar nativeExec = RegExp.prototype.exec;\nvar nativeReplace = shared('native-string-replace', String.prototype.replace);\n\nvar patchedExec = nativeExec;\n\nvar UPDATES_LAST_INDEX_WRONG = (function () {\n var re1 = /a/;\n var re2 = /b*/g;\n nativeExec.call(re1, 'a');\n nativeExec.call(re2, 'a');\n return re1.lastIndex !== 0 || re2.lastIndex !== 0;\n})();\n\nvar UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y || stickyHelpers.BROKEN_CARET;\n\n// nonparticipating capturing group, copied from es5-shim's String#split patch.\n// eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing\nvar NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;\n\nvar PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y;\n\nif (PATCH) {\n patchedExec = function exec(str) {\n var re = this;\n var lastIndex, reCopy, match, i;\n var sticky = UNSUPPORTED_Y && re.sticky;\n var flags = regexpFlags.call(re);\n var source = re.source;\n var charsAdded = 0;\n var strCopy = str;\n\n if (sticky) {\n flags = flags.replace('y', '');\n if (flags.indexOf('g') === -1) {\n flags += 'g';\n }\n\n strCopy = String(str).slice(re.lastIndex);\n // Support anchored sticky behavior.\n if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\\n')) {\n source = '(?: ' + source + ')';\n strCopy = ' ' + strCopy;\n charsAdded++;\n }\n // ^(? + rx + ) is needed, in combination with some str slicing, to\n // simulate the 'y' flag.\n reCopy = new RegExp('^(?:' + source + ')', flags);\n }\n\n if (NPCG_INCLUDED) {\n reCopy = new RegExp('^' + source + '$(?!\\\\s)', flags);\n }\n if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;\n\n match = nativeExec.call(sticky ? reCopy : re, strCopy);\n\n if (sticky) {\n if (match) {\n match.input = match.input.slice(charsAdded);\n match[0] = match[0].slice(charsAdded);\n match.index = re.lastIndex;\n re.lastIndex += match[0].length;\n } else re.lastIndex = 0;\n } else if (UPDATES_LAST_INDEX_WRONG && match) {\n re.lastIndex = re.global ? match.index + match[0].length : lastIndex;\n }\n if (NPCG_INCLUDED && match && match.length > 1) {\n // Fix browsers whose `exec` methods don't consistently return `undefined`\n // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/\n nativeReplace.call(match[0], reCopy, function () {\n for (i = 1; i < arguments.length - 2; i++) {\n if (arguments[i] === undefined) match[i] = undefined;\n }\n });\n }\n\n return match;\n };\n}\n\nmodule.exports = patchedExec;\n","'use strict';\nvar anObject = require('../internals/an-object');\n\n// `RegExp.prototype.flags` getter implementation\n// https://tc39.es/ecma262/#sec-get-regexp.prototype.flags\nmodule.exports = function () {\n var that = anObject(this);\n var result = '';\n if (that.global) result += 'g';\n if (that.ignoreCase) result += 'i';\n if (that.multiline) result += 'm';\n if (that.dotAll) result += 's';\n if (that.unicode) result += 'u';\n if (that.sticky) result += 'y';\n return result;\n};\n","'use strict';\n\nvar fails = require('./fails');\n\n// babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,\n// so we use an intermediate function.\nfunction RE(s, f) {\n return RegExp(s, f);\n}\n\nexports.UNSUPPORTED_Y = fails(function () {\n // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError\n var re = RE('a', 'y');\n re.lastIndex = 2;\n return re.exec('abcd') != null;\n});\n\nexports.BROKEN_CARET = fails(function () {\n // https://bugzilla.mozilla.org/show_bug.cgi?id=773687\n var re = RE('^r', 'gy');\n re.lastIndex = 2;\n return re.exec('str') != null;\n});\n","// `RequireObjectCoercible` abstract operation\n// https://tc39.es/ecma262/#sec-requireobjectcoercible\nmodule.exports = function (it) {\n if (it == undefined) throw TypeError(\"Can't call method on \" + it);\n return it;\n};\n","// `SameValue` abstract operation\n// https://tc39.es/ecma262/#sec-samevalue\n// eslint-disable-next-line es/no-object-is -- safe\nmodule.exports = Object.is || function is(x, y) {\n // eslint-disable-next-line no-self-compare -- NaN check\n return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;\n};\n","var global = require('../internals/global');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nmodule.exports = function (key, value) {\n try {\n createNonEnumerableProperty(global, key, value);\n } catch (error) {\n global[key] = value;\n } return value;\n};\n","'use strict';\nvar getBuiltIn = require('../internals/get-built-in');\nvar definePropertyModule = require('../internals/object-define-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar DESCRIPTORS = require('../internals/descriptors');\n\nvar SPECIES = wellKnownSymbol('species');\n\nmodule.exports = function (CONSTRUCTOR_NAME) {\n var Constructor = getBuiltIn(CONSTRUCTOR_NAME);\n var defineProperty = definePropertyModule.f;\n\n if (DESCRIPTORS && Constructor && !Constructor[SPECIES]) {\n defineProperty(Constructor, SPECIES, {\n configurable: true,\n get: function () { return this; }\n });\n }\n};\n","var defineProperty = require('../internals/object-define-property').f;\nvar has = require('../internals/has');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\n\nmodule.exports = function (it, TAG, STATIC) {\n if (it && !has(it = STATIC ? it : it.prototype, TO_STRING_TAG)) {\n defineProperty(it, TO_STRING_TAG, { configurable: true, value: TAG });\n }\n};\n","var shared = require('../internals/shared');\nvar uid = require('../internals/uid');\n\nvar keys = shared('keys');\n\nmodule.exports = function (key) {\n return keys[key] || (keys[key] = uid(key));\n};\n","var global = require('../internals/global');\nvar setGlobal = require('../internals/set-global');\n\nvar SHARED = '__core-js_shared__';\nvar store = global[SHARED] || setGlobal(SHARED, {});\n\nmodule.exports = store;\n","var IS_PURE = require('../internals/is-pure');\nvar store = require('../internals/shared-store');\n\n(module.exports = function (key, value) {\n return store[key] || (store[key] = value !== undefined ? value : {});\n})('versions', []).push({\n version: '3.11.0',\n mode: IS_PURE ? 'pure' : 'global',\n copyright: '© 2021 Denis Pushkarev (zloirock.ru)'\n});\n","var anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\n// `SpeciesConstructor` abstract operation\n// https://tc39.es/ecma262/#sec-speciesconstructor\nmodule.exports = function (O, defaultConstructor) {\n var C = anObject(O).constructor;\n var S;\n return C === undefined || (S = anObject(C)[SPECIES]) == undefined ? defaultConstructor : aFunction(S);\n};\n","var toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `String.prototype.{ codePointAt, at }` methods implementation\nvar createMethod = function (CONVERT_TO_STRING) {\n return function ($this, pos) {\n var S = String(requireObjectCoercible($this));\n var position = toInteger(pos);\n var size = S.length;\n var first, second;\n if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;\n first = S.charCodeAt(position);\n return first < 0xD800 || first > 0xDBFF || position + 1 === size\n || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF\n ? CONVERT_TO_STRING ? S.charAt(position) : first\n : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;\n };\n};\n\nmodule.exports = {\n // `String.prototype.codePointAt` method\n // https://tc39.es/ecma262/#sec-string.prototype.codepointat\n codeAt: createMethod(false),\n // `String.prototype.at` method\n // https://github.com/mathiasbynens/String.prototype.at\n charAt: createMethod(true)\n};\n","'use strict';\n// based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js\nvar maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1\nvar base = 36;\nvar tMin = 1;\nvar tMax = 26;\nvar skew = 38;\nvar damp = 700;\nvar initialBias = 72;\nvar initialN = 128; // 0x80\nvar delimiter = '-'; // '\\x2D'\nvar regexNonASCII = /[^\\0-\\u007E]/; // non-ASCII chars\nvar regexSeparators = /[.\\u3002\\uFF0E\\uFF61]/g; // RFC 3490 separators\nvar OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';\nvar baseMinusTMin = base - tMin;\nvar floor = Math.floor;\nvar stringFromCharCode = String.fromCharCode;\n\n/**\n * Creates an array containing the numeric code points of each Unicode\n * character in the string. While JavaScript uses UCS-2 internally,\n * this function will convert a pair of surrogate halves (each of which\n * UCS-2 exposes as separate characters) into a single code point,\n * matching UTF-16.\n */\nvar ucs2decode = function (string) {\n var output = [];\n var counter = 0;\n var length = string.length;\n while (counter < length) {\n var value = string.charCodeAt(counter++);\n if (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n // It's a high surrogate, and there is a next character.\n var extra = string.charCodeAt(counter++);\n if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.\n output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n } else {\n // It's an unmatched surrogate; only append this code unit, in case the\n // next code unit is the high surrogate of a surrogate pair.\n output.push(value);\n counter--;\n }\n } else {\n output.push(value);\n }\n }\n return output;\n};\n\n/**\n * Converts a digit/integer into a basic code point.\n */\nvar digitToBasic = function (digit) {\n // 0..25 map to ASCII a..z or A..Z\n // 26..35 map to ASCII 0..9\n return digit + 22 + 75 * (digit < 26);\n};\n\n/**\n * Bias adaptation function as per section 3.4 of RFC 3492.\n * https://tools.ietf.org/html/rfc3492#section-3.4\n */\nvar adapt = function (delta, numPoints, firstTime) {\n var k = 0;\n delta = firstTime ? floor(delta / damp) : delta >> 1;\n delta += floor(delta / numPoints);\n for (; delta > baseMinusTMin * tMax >> 1; k += base) {\n delta = floor(delta / baseMinusTMin);\n }\n return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n};\n\n/**\n * Converts a string of Unicode symbols (e.g. a domain name label) to a\n * Punycode string of ASCII-only symbols.\n */\n// eslint-disable-next-line max-statements -- TODO\nvar encode = function (input) {\n var output = [];\n\n // Convert the input in UCS-2 to an array of Unicode code points.\n input = ucs2decode(input);\n\n // Cache the length.\n var inputLength = input.length;\n\n // Initialize the state.\n var n = initialN;\n var delta = 0;\n var bias = initialBias;\n var i, currentValue;\n\n // Handle the basic code points.\n for (i = 0; i < input.length; i++) {\n currentValue = input[i];\n if (currentValue < 0x80) {\n output.push(stringFromCharCode(currentValue));\n }\n }\n\n var basicLength = output.length; // number of basic code points.\n var handledCPCount = basicLength; // number of code points that have been handled;\n\n // Finish the basic string with a delimiter unless it's empty.\n if (basicLength) {\n output.push(delimiter);\n }\n\n // Main encoding loop:\n while (handledCPCount < inputLength) {\n // All non-basic code points < n have been handled already. Find the next larger one:\n var m = maxInt;\n for (i = 0; i < input.length; i++) {\n currentValue = input[i];\n if (currentValue >= n && currentValue < m) {\n m = currentValue;\n }\n }\n\n // Increase `delta` enough to advance the decoder's ${html}\n