From d67a0339fd727a053afe15d66bba8494911d8564 Mon Sep 17 00:00:00 2001
From: undefined <i@undefined.moe>
Date: Fri, 23 Dec 2022 01:16:43 +0800
Subject: [PATCH] ui: fix \def in katex

---
 packages/ui-default/backendlib/markdown-it-katex.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/ui-default/backendlib/markdown-it-katex.js b/packages/ui-default/backendlib/markdown-it-katex.js
index bad99054..5e1ebff2 100644
--- a/packages/ui-default/backendlib/markdown-it-katex.js
+++ b/packages/ui-default/backendlib/markdown-it-katex.js
@@ -105,6 +105,7 @@ module.exports = function plugin(md) {
   const katexInline = function (latex) {
     options.displayMode = false;
     try {
+      latex = latex.replace(/\\def{\\([a-zA-Z0-9]+)}/g, '\\def\\$1');
       return katex.renderToString(latex, options);
     } catch (error) {
       if (options.throwOnError) logger.error(error);
@@ -117,6 +118,7 @@ module.exports = function plugin(md) {
   const katexBlock = function (latex) {
     options.displayMode = true;
     try {
+      latex = latex.replace(/\\def{\\([a-zA-Z0-9]+)}/g, '\\def\\$1');
       return `<p>${katex.renderToString(latex, options)}</p>`;
     } catch (error) {
       if (options.throwOnError) logger.error(error);