From 644f148a8b85ed19de5df60691f91bd0f5e415cb Mon Sep 17 00:00:00 2001
From: Alexey Pyltsyn <lex61rus@gmail.com>
Date: Wed, 2 Jun 2021 17:20:53 +0300
Subject: [PATCH] fix(v2): remove Markdown heading id from excerpt (#4862)

---
 .../docusaurus-utils/src/__tests__/markdownParser.test.ts | 8 ++++++++
 packages/docusaurus-utils/src/markdownParser.ts           | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/packages/docusaurus-utils/src/__tests__/markdownParser.test.ts b/packages/docusaurus-utils/src/__tests__/markdownParser.test.ts
index 221aaf018a..0edb4c0cb0 100644
--- a/packages/docusaurus-utils/src/__tests__/markdownParser.test.ts
+++ b/packages/docusaurus-utils/src/__tests__/markdownParser.test.ts
@@ -121,6 +121,14 @@ describe('createExcerpt', () => {
       'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum ex urna, molestie et sagittis ut, varius ac justo.',
     );
   });
+
+  test('should create excerpt for heading specified with anchor-id syntax', () => {
+    expect(
+      createExcerpt(dedent`
+          ## Markdown title {#my-anchor-id}
+        `),
+    ).toEqual('Markdown title');
+  });
 });
 
 describe('parseMarkdownContentTitle', () => {
diff --git a/packages/docusaurus-utils/src/markdownParser.ts b/packages/docusaurus-utils/src/markdownParser.ts
index 0e86a714b7..9bdfc02772 100644
--- a/packages/docusaurus-utils/src/markdownParser.ts
+++ b/packages/docusaurus-utils/src/markdownParser.ts
@@ -55,6 +55,8 @@ export function createExcerpt(fileString: string): string | undefined {
       .replace(/(:{3}.*)/, '')
       // Remove Emoji names within colons include preceding whitespace.
       .replace(/\s?(:(::|[^:\n])+:)/g, '')
+      // Remove custom Markdown heading id.
+      .replace(/{#*[\w-]+}/, '')
       .trim();
 
     if (cleanedLine) {