classroom-instruments/dev-dist/sw.js

/**
 * Copyright 2018 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// If the loader is already loaded, just stop.
if (!self.define) {
  let registry = {};

  // Used for `eval` and `importScripts` where we can't get script URL by other means.
  // In both cases, it's safe to use a global var because those functions are synchronous.
  let nextDefineUri;

  const singleRequire = (uri, parentUri) => {
    uri = new URL(uri + '.js', parentUri).href;
    return (
      registry[uri] ||
      new Promise(resolve => {
        if ('document' in self) {
          const script = document.createElement('script');
          script.src = uri;
          script.onload = resolve;
          document.head.appendChild(script);
        } else {
          nextDefineUri = uri;
          importScripts(uri);
          resolve();
        }
      }).then(() => {
        let promise = registry[uri];
        if (!promise) {
          throw new Error(`Module ${uri} didn’t register its module`);
        }
        return promise;
      })
    );
  };

  self.define = (depsNames, factory) => {
    const uri =
      nextDefineUri ||
      ('document' in self ? document.currentScript.src : '') ||
      location.href;
    if (registry[uri]) {
      // Module is already loading or loaded.
      return;
    }
    let exports = {};
    const require = depUri => singleRequire(depUri, uri);
    const specialDeps = {
      module: { uri },
      exports,
      require
    };
    registry[uri] = Promise.all(
      depsNames.map(depName => specialDeps[depName] || require(depName))
    ).then(deps => {
      factory(...deps);
      return exports;
    });
  };
}
define(['./workbox-5357ef54'], function (workbox) {
  'use strict';

  self.skipWaiting();
  workbox.clientsClaim();

  /**
   * The precacheAndRoute() method efficiently caches and responds to
   * requests for URLs in the manifest.
   * See https://goo.gl/S9QRab
   */
  workbox.precacheAndRoute(
    [
      {
        url: 'registerSW.js',
        revision: '3ca0b8505b4bec776b69afdba2768812'
      },
      {
        url: 'index.html',
        revision: '0.75vo45gt8f8'
      }
    ],
    {}
  );
  workbox.cleanupOutdatedCaches();
  workbox.registerRoute(
    new workbox.NavigationRoute(workbox.createHandlerBoundToURL('index.html'), {
      allowlist: [/^\/$/]
    })
  );
});