source: frontend/node_modules/workbox-strategies/src/plugins/cacheOkAndOpaquePlugin.ts

/*
  Copyright 2018 Google LLC

  Use of this source code is governed by an MIT-style
  license that can be found in the LICENSE file or at
  https://opensource.org/licenses/MIT.
*/

import {WorkboxPlugin} from 'workbox-core/types.js';
import '../_version.js';

export const cacheOkAndOpaquePlugin: WorkboxPlugin = {
  /**
   * Returns a valid response (to allow caching) if the status is 200 (OK) or
   * 0 (opaque).
   *
   * @param {Object} options
   * @param {Response} options.response
   * @return {Response|null}
   *
   * @private
   */
  cacheWillUpdate: async ({response}) => {
    if (response.status === 200 || response.status === 0) {
      return response;
    }
    return null;
  },
};