mirror of
https://github.com/angular/angular
synced 2026-05-24 09:28:37 +00:00
e220a615d1
This sync some of the changes we have on the main branch will allow more upcomming changes to land via a single PR. PR Close #63394
43 lines
1.4 KiB
TypeScript
43 lines
1.4 KiB
TypeScript
/*!
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.dev/license
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*/
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const headerIds = new Map<string, number>();
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export const getHeaderId = (heading: string): string => {
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const numberOfHeaderOccurrencesInTheDocument = headerIds.get(heading) ?? 0;
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headerIds.set(heading, numberOfHeaderOccurrencesInTheDocument + 1);
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// extract the extended markdown heading id
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// ex: ## MyHeading {# myId}
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const match = heading.match(/{#([\w-]+)}/);
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let extractedId: string;
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if (match) {
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extractedId = match[1];
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} else {
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extractedId = heading
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.toLowerCase()
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.replace(/<code>(.*?)<\/code>/g, '$1') // remove <code>
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.replace(/<strong>(.*?)<\/strong>/g, '$1') // remove <strong>
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.replace(/<em>(.*?)<\/em>/g, '$1') // remove <em>
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.replace(/\s|\//g, '-') // remove spaces and slashes
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.replace(/gt;|lt;/g, '') // remove escaped < and >
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.replace(/&#\d+;/g, '') // remove HTML entities
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.replace(/[^\p{L}\d\-]/gu, ''); // only keep letters, digits & dashes
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}
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const headerId = numberOfHeaderOccurrencesInTheDocument
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? `${extractedId}-${numberOfHeaderOccurrencesInTheDocument}`
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: extractedId;
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return headerId;
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};
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export const resetHeaderIdsOfCurrentDocument = (): void => {
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headerIds.clear();
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};
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