@atlaskit/adf-schema/dist/es2019/schema/nodes/confluence-unsupported-block.js

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

const name = 'confluenceUnsupportedBlock';
export const confluenceUnsupportedBlock = {
  group: 'block',
  attrs: {
    cxhtml: {
      default: null
    }
  },
  toDOM(node) {
    // NOTE: This node cannot be "contenteditable: false". If it's the only node in a document, PM throws an error because there's nowhere to put the cursor.
    const attrs = {
      'data-node-type': name,
      'data-confluence-unsupported': 'block',
      'data-confluence-unsupported-block-cxhtml': node.attrs['cxhtml']
    };
    return ['div', attrs, 'Unsupported content'];
  },
  parseDOM: [{
    tag: `div[data-node-type="${name}"]`,
    getAttrs(dom) {
      return {
        cxhtml: dom.getAttribute('data-confluence-unsupported-block-cxhtml')
      };
    }
  }]
};