@atlaskit/adf-schema/dist/es2019/schema/add-items.js

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

export function addItems(builtInItems, config, customSpecs = {}) {
  if (!config) {
    return {};
  }

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

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