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\"heading\",\n\th5: \"heading\",\n\th6: \"heading\",\n\theader: \"banner\",\n\thr: \"separator\",\n\thtml: \"document\",\n\tlegend: \"legend\",\n\tli: \"listitem\",\n\tmath: \"math\",\n\tmain: \"main\",\n\tmenu: \"list\",\n\tnav: \"navigation\",\n\tol: \"list\",\n\toptgroup: \"group\",\n\t// WARNING: Only in certain context\n\toption: \"option\",\n\toutput: \"status\",\n\tprogress: \"progressbar\",\n\t// WARNING: Only with an accessible name\n\tsection: \"region\",\n\tsummary: \"button\",\n\ttable: \"table\",\n\ttbody: \"rowgroup\",\n\ttextarea: \"textbox\",\n\ttfoot: \"rowgroup\",\n\t// WARNING: Only in certain context\n\ttd: \"cell\",\n\tth: \"columnheader\",\n\tthead: \"rowgroup\",\n\ttr: \"row\",\n\tul: \"list\",\n};\n\nconst prohibitedAttributes: Record<string, Set<string>> = {\n\tcaption: new Set([\"aria-label\", \"aria-labelledby\"]),\n\tcode: new Set([\"aria-label\", \"aria-labelledby\"]),\n\tdeletion: new Set([\"aria-label\", \"aria-labelledby\"]),\n\temphasis: new Set([\"aria-label\", \"aria-labelledby\"]),\n\tgeneric: new Set([\"aria-label\", \"aria-labelledby\", \"aria-roledescription\"]),\n\tinsertion: new Set([\"aria-label\", \"aria-labelledby\"]),\n\tparagraph: new Set([\"aria-label\", \"aria-labelledby\"]),\n\tpresentation: new Set([\"aria-label\", \"aria-labelledby\"]),\n\tstrong: new Set([\"aria-label\", \"aria-labelledby\"]),\n\tsubscript: new Set([\"aria-label\", \"aria-labelledby\"]),\n\tsuperscript: new Set([\"aria-label\", \"aria-labelledby\"]),\n};\n\n/**\n *\n * @param element\n * @param role The role used for this element. This is specified to control whether you want to use the implicit or explicit role.\n */\nfunction hasGlobalAriaAttributes(element: Element, role: string): boolean {\n\t// https://rawgit.com/w3c/aria/stable/#global_states\n\t// commented attributes are deprecated\n\treturn [\n\t\t\"aria-atomic\",\n\t\t\"aria-busy\",\n\t\t\"aria-controls\",\n\t\t\"aria-current\",\n\t\t\"aria-describedby\",\n\t\t\"aria-details\",\n\t\t// \"disabled\",\n\t\t\"aria-dropeffect\",\n\t\t// \"errormessage\",\n\t\t\"aria-flowto\",\n\t\t\"aria-grabbed\",\n\t\t// \"haspopup\",\n\t\t\"aria-hidden\",\n\t\t// \"invalid\",\n\t\t\"aria-keyshortcuts\",\n\t\t\"aria-label\",\n\t\t\"aria-labelledby\",\n\t\t\"aria-live\",\n\t\t\"aria-owns\",\n\t\t\"aria-relevant\",\n\t\t\"aria-roledescription\",\n\t].some((attributeName) => {\n\t\treturn (\n\t\t\telement.hasAttribute(attributeName) &&\n\t\t\t!prohibitedAttributes[role]?.has(attributeName)\n\t\t);\n\t});\n}\n\nfunction ignorePresentationalRole(\n\telement: Element,\n\timplicitRole: string\n): boolean {\n\t// https://rawgit.com/w3c/aria/stable/#conflict_resolution_presentation_none\n\treturn hasGlobalAriaAttributes(element, implicitRole);\n}\n\nexport default function getRole(element: Element): string | null {\n\tconst explicitRole = getExplicitRole(element);\n\tif (explicitRole === null || explicitRole === \"presentation\") {\n\t\tconst implicitRole = getImplicitRole(element);\n\t\tif (\n\t\t\texplicitRole !== \"presentation\" ||\n\t\t\tignorePresentationalRole(element, implicitRole || \"\")\n\t\t) {\n\t\t\treturn implicitRole;\n\t\t}\n\t}\n\n\treturn explicitRole;\n}\n\nfunction getImplicitRole(element: Element): string | null {\n\tconst mappedByTag = localNameToRoleMappings[getLocalName(element)];\n\tif (mappedByTag !== undefined) {\n\t\treturn mappedByTag;\n\t}\n\n\tswitch (getLocalName(element)) {\n\t\tcase \"a\":\n\t\tcase \"area\":\n\t\tcase \"link\":\n\t\t\tif (element.hasAttribute(\"href\")) {\n\t\t\t\treturn \"link\";\n\t\t\t}\n\t\t\tbreak;\n\t\tcase \"img\":\n\t\t\tif (\n\t\t\t\telement.getAttribute(\"alt\") === \"\" &&\n\t\t\t\t!ignorePresentationalRole(element, \"img\")\n\t\t\t) {\n\t\t\t\treturn \"presentation\";\n\t\t\t}\n\t\t\treturn \"img\";\n\t\tcase \"input\": {\n\t\t\tconst { type } = element as HTMLInputElement;\n\t\t\tswitch (type) {\n\t\t\t\tcase \"button\":\n\t\t\t\tcase \"image\":\n\t\t\t\tcase \"reset\":\n\t\t\t\tcase \"submit\":\n\t\t\t\t\treturn \"button\";\n\t\t\t\tcase \"checkbox\":\n\t\t\t\tcase \"radio\":\n\t\t\t\t\treturn type;\n\t\t\t\tcase \"range\":\n\t\t\t\t\treturn \"slider\";\n\t\t\t\tcase \"email\":\n\t\t\t\tcase \"tel\":\n\t\t\t\tcase \"text\":\n\t\t\t\tcase \"url\":\n\t\t\t\t\tif (element.hasAttribute(\"list\")) {\n\t\t\t\t\t\treturn \"combobox\";\n\t\t\t\t\t}\n\t\t\t\t\treturn \"textbox\";\n\n\t\t\t\tcase \"search\":\n\t\t\t\t\tif (element.hasAttribute(\"list\")) {\n\t\t\t\t\t\treturn \"combobox\";\n\t\t\t\t\t}\n\t\t\t\t\treturn \"searchbox\";\n\t\t\t\tcase \"number\":\n\t\t\t\t\treturn \"spinbutton\";\n\t\t\t\tdefault:\n\t\t\t\t\treturn null;\n\t\t\t}\n\t\t}\n\t\tcase \"select\":\n\t\t\tif (\n\t\t\t\telement.hasAttribute(\"multiple\") ||\n\t\t\t\t(element as HTMLSelectElement).size > 1\n\t\t\t) {\n\t\t\t\treturn \"listbox\";\n\t\t\t}\n\t\t\treturn \"combobox\";\n\t}\n\treturn null;\n}\n\nfunction getExplicitRole(element: Element): string | null {\n\tconst role = element.getAttribute(\"role\");\n\tif (role !== null) {\n\t\tconst explicitRole = role.trim().split(\" \")[0];\n\t\t// String.prototype.split(sep, limit) will always return an array with at least one member\n\t\t// as long as limit is either undefined or > 0\n\t\tif (explicitRole.length > 0) {\n\t\t\treturn explicitRole;\n\t\t}\n\t}\n\n\treturn null;\n}\n"],"file":"getRole.js"}