From 2ad38e3044063e60bdad98618997233b27383001 Mon Sep 17 00:00:00 2001
From: Andrew Cherniavskii <andrew@mui.com>
Date: Thu, 5 Sep 2024 14:56:26 +0200
Subject: [PATCH] [docs-infra] Fix broken anchor button when header has a link
 (#43598)

---
 packages/markdown/parseMarkdown.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/markdown/parseMarkdown.js b/packages/markdown/parseMarkdown.js
index caa98584c787a2..f13fcf239c365b 100644
--- a/packages/markdown/parseMarkdown.js
+++ b/packages/markdown/parseMarkdown.js
@@ -366,7 +366,13 @@ function createRender(context) {
       }
 
       return [
-        `<h${level} id="${hash}"><a href="#${hash}" class="title-link-to-anchor">${headingHtml}<span class="anchor-icon"><svg><use xlink:href="#anchor-link-icon" /></svg></span></a>`,
+        headingHtml.includes('<a ')
+          ? [
+              // Avoid breaking the anchor link button
+              `<h${level} id="${hash}"><a href="#${hash}" class="title-link-to-anchor">${headingHtml}</a>`,
+              `<a href="#${hash}" class="title-link-to-anchor"><span class="anchor-icon"><svg><use xlink:href="#anchor-link-icon" /></svg></span></a>`,
+            ].join('')
+          : `<h${level} id="${hash}"><a href="#${hash}" class="title-link-to-anchor">${headingHtml}<span class="anchor-icon"><svg><use xlink:href="#anchor-link-icon" /></svg></span></a>`,
         `<button title="Post a comment" class="comment-link" data-feedback-hash="${hash}">`,
         '<svg><use xlink:href="#comment-link-icon" /></svg>',
         `</button>`,