From 058af4445a221e5a5a8b84599a27c93f78f1e95d Mon Sep 17 00:00:00 2001
From: James Yu <yujianqiaojames@gmail.com>
Date: Sat, 6 Jan 2024 10:33:54 +0000
Subject: [PATCH] Fix #4127 Remove macro star when rendering MathJax

---
 src/preview/math/mathpreviewlib/newcommandfinder.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/preview/math/mathpreviewlib/newcommandfinder.ts b/src/preview/math/mathpreviewlib/newcommandfinder.ts
index 7114a27f8..1d5040760 100644
--- a/src/preview/math/mathpreviewlib/newcommandfinder.ts
+++ b/src/preview/math/mathpreviewlib/newcommandfinder.ts
@@ -64,7 +64,13 @@ function parseAst(content: string, node: Ast.Node): string[] {
             lastContent = lastArg.content[lastArg.content.length - 1]
         }
         const end = (lastArg.content[lastArg.content.length - 1].position?.end.offset ?? -1 - closeBraceOffset) + closeBraceOffset
-        macros.push(content.slice(start, end + 1).replaceAll(/\\providecommand([^a-zA-Z])/g, '\\newcommand$1'))
+        macros.push(
+            content.slice(start, end + 1)
+                // Change providecommand to newcommand
+                .replaceAll(/^\\providecommand([^a-zA-Z])/g, '\\newcommand$1')
+                // Remove the star as MathJax does not support #4127
+                .replaceAll(/^\\([a-zA-Z]+)\*/g, '\\$1')
+        )
     }
 
     if ('content' in node && typeof node.content !== 'string') {