@atlaskit/adf-schema/dist/esm/schema/add-items.js

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

export function addItems(builtInItems, config) {
  var customSpecs = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  if (!config) {
    return {};
  }

  /**
   * Add built-in Node / Mark specs
   */
  var items = builtInItems.reduce(function (items, _ref) {
    var name = _ref.name,
      spec = _ref.spec;
    if (config.indexOf(name) !== -1) {
      items[name] = customSpecs[name] || spec;
    }
    return items;
  }, {});

  /**
   * Add Custom Node / Mark specs
   */
  return Object.keys(customSpecs).reduce(function (items, name) {
    if (items[name]) {
      return items;
    }
    items[name] = customSpecs[name];
    return items;
  }, items);
}