Merge pull request #2671 from codecrafters-io/CC-1638

Make code-blocks non focusable using tab

Author: ryan-gang

app/helpers/markdown-to-html.ts

@@ -44,6 +44,12 @@ export default class MarkdownToHtml extends Helper<Signature> {
         node.setAttribute('target', '_blank');
         node.setAttribute('rel', 'noopener noreferrer');
       }
+
+      // https://github.com/PrismJS/prism/issues/3658
+      // PrismJS unconditionally adds a tabindex to <pre> elements, without any opt-out
+      if (node.nodeName === 'PRE') {
+        node.setAttribute('tabindex', '-1');
+      }
     });
 
     return DOMPurify.sanitize(generatedHtml);