1 files changed, 9 insertions, 1 deletions
diff --git a/app/assets/javascripts/content_editor/extensions/subscript.js b/app/assets/javascripts/content_editor/extensions/subscript.js
index 4bf89796efe..d0766f42308 100644
--- a/app/assets/javascripts/content_editor/extensions/subscript.js
+++ b/app/assets/javascripts/content_editor/extensions/subscript.js
@@ -1 +1,9 @@
-export { Subscript as default } from '@tiptap/extension-subscript';
+import { markInputRule } from '@tiptap/core';
+import { Subscript } from '@tiptap/extension-subscript';
+import { markInputRegex, extractMarkAttributesFromMatch } from '../services/mark_utils';
+
+export default Subscript.extend({
+  addInputRules() {
+    return [markInputRule(markInputRegex('sub'), this.type, extractMarkAttributesFromMatch)];
+  },
+});