Superscript.js

import { Mark } from 'tiptap'
import { toggleMark } from 'tiptap-commands'

export default class Superscript extends Mark {

  get name() {
    return 'superscript'
  }

  get schema() {
    return {
      parseDOM: [
        {
          tag: 'sup',
        },
        {
          style: 'vertical-align',
          getAttrs: value => value === 'super',
        },
      ],
      toDOM: () => ['sup', 0],
    }
  }

  commands({ type }) {
    return () => toggleMark(type)
  }

}