{"version":3,"file":"legacy.js","sources":["src/browser-legacy.js"],"sourcesContent":["export default function cssBlankPseudo(document, opts) {\n\t// configuration\n\tconst className = Object(opts).className;\n\tconst attr = Object(opts).attr || 'blank';\n\tconst force = Object(opts).force;\n\n\ttry {\n\t\tdocument.querySelector(':blank');\n\n\t\tif (!force) {\n\t\t\treturn;\n\t\t}\n\t} catch (ignoredError) { /* do nothing and continue */ }\n\n\t// observe value changes on <input>, <select>, and <textarea>\n\tconst window = (document.ownerDocument || document).defaultView;\n\n\tobserveValueOfHTMLElement(window.HTMLInputElement);\n\tobserveValueOfHTMLElement(window.HTMLSelectElement);\n\tobserveValueOfHTMLElement(window.HTMLTextAreaElement);\n\tobserveSelectedOfHTMLElement(window.HTMLOptionElement);\n\n\t// form control elements selector\n\tconst selector = 'INPUT,SELECT,TEXTAREA';\n\tconst selectorRegExp = /^(INPUT|SELECT|TEXTAREA)$/;\n\n\t// conditionally update all form control elements\n\tArray.prototype.forEach.call(\n\t\tdocument.querySelectorAll(selector),\n\t\tnode => {\n\t\t\tif (node.nodeName === 'SELECT') {\n\t\t\t\tnode.addEventListener('change', configureCssBlankAttribute);\n\t\t\t} else {\n\t\t\t\tnode.addEventListener('input', configureCssBlankAttribute);\n\t\t\t}\n\n\t\t\tconfigureCssBlankAttribute.call(node);\n\t\t}\n\t);\n\n\t// conditionally observe added or unobserve removed form control elements\n\tnew MutationObserver(mutationsList => {\n\t\tmutationsList.forEach(mutation => {\n\t\t\tArray.prototype.forEach.call(\n\t\t\t\tmutation.addedNodes || [],\n\t\t\t\tnode => {\n\t\t\t\t\tif (node.nodeType === 1 && selectorRegExp.test(node.nodeName)) {\n\t\t\t\t\t\tif (node.nodeName === 'SELECT') {\n\t\t\t\t\t\t\tnode.addEventListener('change', configureCssBlankAttribute);\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tnode.addEventListener('input', configureCssBlankAttribute);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tconfigureCssBlankAttribute.call(node);\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t);\n\n\t\t\tArray.prototype.forEach.call(\n\t\t\t\tmutation.removedNodes || [],\n\t\t\t\tnode => {\n\t\t\t\t\tif (node.nodeType === 1 && selectorRegExp.test(node.nodeName)) {\n\t\t\t\t\t\tif (node.nodeName === 'SELECT') {\n\t\t\t\t\t\t\tnode.removeEventListener('change', configureCssBlankAttribute);\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tnode.removeEventListener('input', configureCssBlankAttribute);\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t);\n\t\t});\n\t}).observe(document, { childList: true, subtree: true });\n\n\t// update a form control element’s css-blank attribute\n\tfunction configureCssBlankAttribute() {\n\t\tif (this.value || this.nodeName === 'SELECT' && this.options[this.selectedIndex].value) {\n\t\t\tif (attr) {\n\t\t\t\tthis.removeAttribute(attr);\n\t\t\t}\n\n\t\t\tif (className) 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