{"version":3,"file":"Element.mjs","sources":["../../../../src/govuk/vendor/polyfills/Element.mjs"],"sourcesContent":["// @ts-nocheck\nimport './Document.mjs'\n\n(function(undefined) {\n\n// Detection from https://github.com/Financial-Times/polyfill-service/blob/master/packages/polyfill-library/polyfills/Element/detect.js\nvar detect = ('Element' in this && 'HTMLElement' in this)\n\nif (detect) return\n\n// Polyfill from https://cdn.polyfill.io/v2/polyfill.js?features=Element&flags=always\n(function () {\n\n\t// IE8\n\tif (window.Element && !window.HTMLElement) {\n\t\twindow.HTMLElement = window.Element;\n\t\treturn;\n\t}\n\n\t// create Element constructor\n\twindow.Element = window.HTMLElement = new Function('return function Element() {}')();\n\n\t// generate sandboxed iframe\n\tvar vbody = document.appendChild(document.createElement('body'));\n\tvar frame = vbody.appendChild(document.createElement('iframe'));\n\n\t// use sandboxed iframe to replicate Element functionality\n\tvar 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!cache.hasOwnProperty(propertyName),\n\t\tnewValue = prototype[propertyName],\n\t\toldValue = cache[propertyName],\n\t\tindex = -1,\n\t\telement;\n\n\t\twhile (element = elements[++index]) {\n\t\t\tif (element.nodeType === 1) {\n\t\t\t\tif (nonValue || element[propertyName] === oldValue) {\n\t\t\t\t\telement[propertyName] = newValue;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tcache[propertyName] = newValue;\n\t});\n\n\tprototype.constructor = Element;\n\n\tif (!prototype.hasAttribute) {\n\t\t// <Element>.hasAttribute\n\t\tprototype.hasAttribute = function hasAttribute(name) {\n\t\t\treturn this.getAttribute(name) !== null;\n\t\t};\n\t}\n\n\t// Apply Element prototype to the pre-existing DOM as soon as the body element appears.\n\tfunction bodyCheck() {\n\t\tif (!(loopLimit--)) clearTimeout(interval);\n\t\tif (document.body && !document.body.prototype && /(complete|interactive)/.test(document.readyState)) {\n\t\t\tshiv(document, true);\n\t\t\tif (interval && document.body.prototype) 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