Temporarily remove highlighting for PowerShell and C++ in Safari to avoid page crash (#3508)

Author: clairechabas

.changeset/sixty-toes-attack.md

@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Remove highlighting in Safari for PowerShell and C++ to avoid page crash until next version with bug fix is released

packages/gitbook/src/components/DocumentView/CodeBlock/highlight.ts

@@ -34,6 +34,8 @@ export type RenderedInline = {
     body: React.ReactNode;
 };
 
+const isSafari =
+    typeof navigator !== 'undefined' && /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
 const theme = createCssVariablesTheme();
 
 const { getSingletonHighlighter } = createSingletonShorthands(
@@ -65,8 +67,13 @@ export async function highlight(
     inlines: RenderedInline[]
 ): Promise<HighlightLine[]> {
     const langName = getBlockLang(block);
-    if (!langName) {
-        // Language not found, fallback to plain highlighting
+
+    if (!langName || (isSafari && ['powershell', 'cpp'].includes(langName))) {
+        // Fallback to plain highlighting if
+        // - language is not found
+        // - TEMP : language is PowerShell or C++ and browser is Safari:
+        //   RegExp#[Symbol.search] throws TypeError when `lastIndex` isn’t writable
+        //   Fixed in upcoming Safari 18.6, remove when it'll be released - RND-7772
         return plainHighlight(block, inlines);
     }