From 3efc1018751e04a0d6de49acee605bce8fce04e2 Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Mon, 19 Aug 2024 14:05:40 +0200
Subject: [PATCH] rehype-katex: fix crash on katex error

Closes remarkjs/react-markdown#853.
---
 packages/rehype-katex/lib/index.js | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/packages/rehype-katex/lib/index.js b/packages/rehype-katex/lib/index.js
index 91c8054..1f858c8 100644
--- a/packages/rehype-katex/lib/index.js
+++ b/packages/rehype-katex/lib/index.js
@@ -101,18 +101,19 @@ export default function rehypeKatex(options) {
           source: 'rehype-katex'
         })
 
-        // KaTeX can handle `ParseError` itself, but not others.
-        if (ruleId === 'parseerror') {
+        // KaTeX *should* handle `ParseError` itself, but not others.
+        // it doesn’t always:
+        // <https://github.com/remarkjs/react-markdown/issues/853>
+        try {
           result = katex.renderToString(value, {
             ...settings,
             displayMode,
             strict: 'ignore',
             throwOnError: false
           })
-        }
-        // Generate similar markup if this is an other error.
-        // See: <https://github.com/KaTeX/KaTeX/blob/5dc7af0/docs/error.md>.
-        else {
+        } catch {
+          // Generate similar markup if this is an other error.
+          // See: <https://github.com/KaTeX/KaTeX/blob/5dc7af0/docs/error.md>.
           result = [
             {
               type: 'element',