| 1 | {"version":3,"file":"index.mjs","sources":["src/browser.js"],"sourcesContent":["export default function cssHasPseudo(document) {\n\tconst observedItems = [];\n\n\t// document.createAttribute() doesn't support `:` in the name. innerHTML does\n\tconst attributeElement = document.createElement('x');\n\n\t// walk all stylesheets to collect observed css rules\n\t[].forEach.call(document.styleSheets, walkStyleSheet);\n\ttransformObservedItems();\n\n\t// observe DOM modifications that affect selectors\n\tconst mutationObserver = new MutationObserver(mutationsList => {\n\t\tmutationsList.forEach(mutation => {\n\t\t\t[].forEach.call(mutation.addedNodes || [], node => {\n\t\t\t\t// walk stylesheets to collect observed css rules\n\t\t\t\tif (node.nodeType === 1 && node.sheet) {\n\t\t\t\t\twalkStyleSheet(node.sheet);\n\t\t\t\t}\n\t\t\t});\n\n\t\t\t// transform observed css rules\n\t\t\tcleanupObservedCssRules();\n\t\t\ttransformObservedItems();\n\t\t});\n\t});\n\n\tmutationObserver.observe(document, { childList: true, subtree: true });\n\n\t// observe DOM events that affect pseudo-selectors\n\tdocument.addEventListener('focus', transformObservedItems, true);\n\tdocument.addEventListener('blur', transformObservedItems, true);\n\tdocument.addEventListener('input', transformObservedItems);\n\n\t// transform observed css rules\n\tfunction transformObservedItems() {\n\t\trequestAnimationFrame(() => {\n\t\t\tobservedItems.forEach(\n\t\t\t\titem => {\n\t\t\t\t\tconst nodes = [];\n\n\t\t\t\t\t[].forEach.call(\n\t\t\t\t\t\tdocument.querySelectorAll(item.scopeSelector),\n\t\t\t\t\t\telement => {\n\t\t\t\t\t\t\tconst nthChild = [].indexOf.call(element.parentNode.children, element) + 1;\n\t\t\t\t\t\t\tconst relativeSelectors = item.relativeSelectors.map(\n\t\t\t\t\t\t\t\trelativeSelector => item.scopeSelector + ':nth-child(' + nthChild + ') ' + relativeSelector\n\t\t\t\t\t\t\t).join();\n\n\t\t\t\t\t\t\t// find any relative :has element from the :scope element\n\t\t\t\t\t\t\tconst relativeElement = element.parentNode.querySelector(relativeSelectors);\n\n\t\t\t\t\t\t\tconst shouldElementMatch = item.isNot ? !relativeElement : relativeElement;\n\n\t\t\t\t\t\t\tif (shouldElementMatch) {\n\t\t\t\t\t\t\t\t// memorize the node\n\t\t\t\t\t\t\t\tnodes.push(element);\n\n\t\t\t\t\t\t\t\t// set an attribute with an irregular attribute name\n\t\t\t\t\t\t\t\t// document.createAttribute() doesn't support special characters\n\t\t\t\t\t\t\t\tattributeElement.innerHTML = '<x ' + item.attributeName + '>';\n\n\t\t\t\t\t\t\t\telement.setAttributeNode(attributeElement.children[0].attributes[0].cloneNode());\n\n\t\t\t\t\t\t\t\t// trigger a style refresh in IE and Edge\n\t\t\t\t\t\t\t\tdocument.documentElement.style.zoom = 1; document.documentElement.style.zoom = null;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t);\n\n\t\t\t\t\t// remove the encoded attribute from all nodes that no longer match them\n\t\t\t\t\titem.nodes.forEach(node => {\n\t\t\t\t\t\tif (nodes.indexOf(node) === -1) {\n\t\t\t\t\t\t\tnode.removeAttribute(item.attributeName);\n\n\t\t\t\t\t\t\t// trigger a style refresh in IE and Edge\n\t\t\t\t\t\t\tdocument.documentElement.style.zoom = 1; document.documentElement.style.zoom = null;\n\t\t\t\t\t\t}\n\t\t\t\t\t});\n\n\t\t\t\t\t// update the\n\t\t\t\t\titem.nodes = nodes;\n\t\t\t\t}\n\t\t\t);\n\t\t});\n\t}\n\n\t// remove any observed cssrules that no longer apply\n\tfunction cleanupObservedCssRules() {\n\t\t[].push.apply(\n\t\t\tobservedItems,\n\t\t\tobservedItems.splice(0).filter(\n\t\t\t\titem => item.rule.parentStyleSheet &&\n\t\t\t\t\titem.rule.parentStyleSheet.ownerNode &&\n\t\t\t\t\tdocument.documentElement.contains(item.rule.parentStyleSheet.ownerNode)\n\t\t\t)\n\t\t);\n\t}\n\n\t// walk a stylesheet to collect observed css rules\n\tfunction walkStyleSheet(styleSheet) {\n\t\ttry {\n\t\t\t// walk a css rule to collect observed css rules\n\t\t\t[].forEach.call(styleSheet.cssRules || [], rule => {\n\t\t\t\tif (rule.selectorText) {\n\t\t\t\t\t// decode the selector text in all browsers to:\n\t\t\t\t\t// [1] = :scope, [2] = :not(:has), [3] = :has relative, [4] = :scope relative\n\t\t\t\t\tconst selectors = decodeURIComponent(rule.selectorText.replace(/\\\\(.)/g, '$1')).match(/^(.*?)\\[:(not-)?has\\((.+?)\\)\\](.*?)$/);\n\n\t\t\t\t\tif (selectors) {\n\t\t\t\t\t\tconst attributeName = ':' + (selectors[2] ? 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