app/assets/javascripts/content_editor/extensions/superscript.js


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import { markInputRule } from '@tiptap/core';
import { Superscript } from '@tiptap/extension-superscript';
import { markInputRegex, extractMarkAttributesFromMatch } from '../services/mark_utils';

export default Superscript.extend({
  addInputRules() {
    return [
      markInputRule({
        find: markInputRegex('sup'),
        type: this.type,
        getAttributes: extractMarkAttributesFromMatch,
      }),
    ];
  },
});