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13 changes: 8 additions & 5 deletions packages/docusaurus-mdx-loader/src/remark/headings/index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -78,15 +78,18 @@ function extractCommentId(heading: Heading) {
return undefined;
}

// Try to find an explicit id in the heading text (legacy {#id} syntax)
function extractLegacySyntaxId(heading: Heading, headingText: string) {
const parsedHeading = parseMarkdownHeadingId(headingText);
// Try to find an explicit id in the heading text (classic {#id} syntax)
function extractClassicSyntaxHeadingId(heading: Heading, headingText: string) {
const parsedHeading = parseMarkdownHeadingId(headingText, 'classic');
// Remove the heading text from its id (legacy syntax)
if (parsedHeading.id) {
// When there's an id, it is always in the last child node
const lastNode = heading.children.at(-1) as Text;
if (heading.children.length > 1) {
const lastNodeText = parseMarkdownHeadingId(lastNode.value).text;
const lastNodeText = parseMarkdownHeadingId(
lastNode.value,
'classic',
).text;
// When the last part contains text + id, remove the id
if (lastNodeText) {
lastNode.value = lastNodeText;
Expand Down Expand Up @@ -135,7 +138,7 @@ const plugin: Plugin<PluginOptions[], Root> = function plugin({
function extractIdFromText() {
const headingText = getHeadingText(heading);
return (
extractLegacySyntaxId(heading, headingText) ??
extractClassicSyntaxHeadingId(heading, headingText) ??
slugs.slug(headingText, {maintainCase: anchorsMaintainCase})
);
}
Expand Down
2 changes: 1 addition & 1 deletion packages/docusaurus-plugin-google-gtag/package.json
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@
"@docusaurus/core": "3.9.2",
"@docusaurus/types": "3.9.2",
"@docusaurus/utils-validation": "3.9.2",
"@types/gtag.js": "^0.0.12",
"@types/gtag.js": "^0.0.20",
"tslib": "^2.6.0"
},
"peerDependencies": {
Expand Down
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