From ee44016455e22e077fc9021a8e399f824b8daf3e Mon Sep 17 00:00:00 2001
From: Soichiro Miki <smiki-tky@umin.ac.jp>
Date: Thu, 2 Nov 2023 14:43:33 +0900
Subject: [PATCH] Redirect some external links to Japanese versions

---
 src/components/MDX/Link.tsx | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/components/MDX/Link.tsx b/src/components/MDX/Link.tsx
index 7bf041e56..a42d52891 100644
--- a/src/components/MDX/Link.tsx
+++ b/src/components/MDX/Link.tsx
@@ -29,6 +29,16 @@ function Link({
     // eslint-disable-next-line jsx-a11y/anchor-has-content
     return <a href={href} className={className} {...props} />;
   }
+
+  // Tweak external links (added by ja.react.dev team)
+  href = href
+    .replace(
+      'https://developer.mozilla.org/en-US/',
+      'https://developer.mozilla.org/'
+    )
+    .replace('https://reactjs.org/', 'https://ja.reactjs.org/')
+    .replace('https://legacy.reactjs.org/', 'https://ja.legacy.reactjs.org/');
+
   return (
     <>
       {href.startsWith('https://') ? (