@atlaskit/adf-schema/dist/es2019/next-schema/marks/subsup.js

Shared package that contains the ADF-schema (json) and ProseMirror node/mark specs

import { adfMark } from '@atlaskit/adf-schema-generator';
export const subsup = adfMark('subsup').define({
  inclusive: true,
  attrs: {
    type: {
      type: 'enum',
      values: ['sub', 'sup'],
      default: 'sub'
    }
  }
});