Javascript 如何在cra模板pwa模板create react app中正确使用Workbox文件service-worker.js？

我尝试使用create react app和

3.4.1

和

4.0.0-next.77

（生成的两个应用程序没有差异）通过

create-react-app my-app --template cra-template-pwa

代码在

有两个文件与service worker/Workbox相关

• service-worker.js
• serviceWorkerRegistration.js

这是原始的服务人员.js：

/* eslint-disable no-restricted-globals */

// This service worker can be customized!
// See https://developers.google.com/web/tools/workbox/modules
// for the list of available Workbox modules, or add any other
// code you'd like.
// You can also remove this file if you'd prefer not to use a
// service worker, and the Workbox build step will be skipped.

import { clientsClaim } from 'workbox-core';
import { ExpirationPlugin } from 'workbox-expiration';
import { precacheAndRoute, createHandlerBoundToURL } from 'workbox-precaching';
import { registerRoute } from 'workbox-routing';
import { StaleWhileRevalidate } from 'workbox-strategies';

clientsClaim();

// Precache all of the assets generated by your build process.
// Their URLs are injected into the manifest variable below.
// This variable must be present somewhere in your service worker file,
// even if you decide not to use precaching. See https://cra.link/PWA
precacheAndRoute(self.__WB_MANIFEST);

// Set up App Shell-style routing, so that all navigation requests
// are fulfilled with your index.html shell. Learn more at
// https://developers.google.com/web/fundamentals/architecture/app-shell
const fileExtensionRegexp = new RegExp('/[^/?]+\\.[^/]+$');
registerRoute(
  // Return false to exempt requests from being fulfilled by index.html.
  ({ request, url }) => {
    // If this isn't a navigation, skip.
    if (request.mode !== 'navigate') {
      return false;
    } // If this is a URL that starts with /_, skip.

    if (url.pathname.startsWith('/_')) {
      return false;
    } // If this looks like a URL for a resource, because it contains // a file extension, skip.

    if (url.pathname.match(fileExtensionRegexp)) {
      return false;
    } // Return true to signal that we want to use the handler.

    return true;
  },
  createHandlerBoundToURL(process.env.PUBLIC_URL + '/index.html')
);

// An example runtime caching route for requests that aren't handled by the
// precache, in this case same-origin .png requests like those from in public/
registerRoute(
  // Add in any other file extensions or routing criteria as needed.
  ({ url }) => url.origin === self.location.origin && url.pathname.endsWith('.png'), // Customize this strategy as needed, e.g., by changing to CacheFirst.
  new StaleWhileRevalidate({
    cacheName: 'images',
    plugins: [
      // Ensure that once this runtime cache reaches a maximum size the
      // least-recently used images are removed.
      new ExpirationPlugin({ maxEntries: 50 }),
    ],
  })
);

// This allows the web app to trigger skipWaiting via
// registration.waiting.postMessage({type: 'SKIP_WAITING'})
self.addEventListener('message', (event) => {
  if (event.data && event.data.type === 'SKIP_WAITING') {
    self.skipWaiting();
  }
});

// Any other custom service worker logic can go here.

基于内部和外部的评论，我认为我应该能够定制Workbox

我通过将

unregister（）

更改为

register（）

打开了index.js中的服务工作者：

但是，我无法使用service worker.js找到代码的任何部分，所以我甚至添加了

console.log('Workbox got called in service-worker.js');

在内部，

console.log

在dev环境中也从未被调用过

yarn start

yarn build
serve build --ssl-cert ./my.crt --ssl-key ./my.key

在prod环境中也是如此

yarn start

yarn build
serve build --ssl-cert ./my.crt --ssl-key ./my.key

我试图补充

import './service-worker';

在index.js之上

然而，它会给我错误

不是数组：传入“workbox precaching.PrecacheController.addToCacheList（）”的参数“entries”必须是数组

根据错误，如果我更改

precacheAndRoute（self.\uuwb\umanifest）至
预cheandroute（[self.\uu WB\u MANIFEST]），则错误变为

添加到缓存列表意外类型：向“workbox precaching.PrecacheController.addToCacheList（）”传递了意外条目。不支持“undefined”条目。必须提供包含一个或多个字符的字符串数组、具有url属性的对象或请求对象

如何正确使用Workbox文件service worker.js？谢谢


更新：

/* eslint-disable no-restricted-globals */

// This service worker can be customized!
// See https://developers.google.com/web/tools/workbox/modules
// for the list of available Workbox modules, or add any other
// code you'd like.
// You can also remove this file if you'd prefer not to use a
// service worker, and the Workbox build step will be skipped.

import { clientsClaim } from 'workbox-core';
import { ExpirationPlugin } from 'workbox-expiration';
import { precacheAndRoute, createHandlerBoundToURL } from 'workbox-precaching';
import { registerRoute } from 'workbox-routing';
import { StaleWhileRevalidate } from 'workbox-strategies';

clientsClaim();

// Precache all of the assets generated by your build process.
// Their URLs are injected into the manifest variable below.
// This variable must be present somewhere in your service worker file,
// even if you decide not to use precaching. See https://cra.link/PWA
precacheAndRoute(self.__WB_MANIFEST);

// Set up App Shell-style routing, so that all navigation requests
// are fulfilled with your index.html shell. Learn more at
// https://developers.google.com/web/fundamentals/architecture/app-shell
const fileExtensionRegexp = new RegExp('/[^/?]+\\.[^/]+$');
registerRoute(
  // Return false to exempt requests from being fulfilled by index.html.
  ({ request, url }) => {
    // If this isn't a navigation, skip.
    if (request.mode !== 'navigate') {
      return false;
    } // If this is a URL that starts with /_, skip.

    if (url.pathname.startsWith('/_')) {
      return false;
    } // If this looks like a URL for a resource, because it contains // a file extension, skip.

    if (url.pathname.match(fileExtensionRegexp)) {
      return false;
    } // Return true to signal that we want to use the handler.

    return true;
  },
  createHandlerBoundToURL(process.env.PUBLIC_URL + '/index.html')
);

// An example runtime caching route for requests that aren't handled by the
// precache, in this case same-origin .png requests like those from in public/
registerRoute(
  // Add in any other file extensions or routing criteria as needed.
  ({ url }) => url.origin === self.location.origin && url.pathname.endsWith('.png'), // Customize this strategy as needed, e.g., by changing to CacheFirst.
  new StaleWhileRevalidate({
    cacheName: 'images',
    plugins: [
      // Ensure that once this runtime cache reaches a maximum size the
      // least-recently used images are removed.
      new ExpirationPlugin({ maxEntries: 50 }),
    ],
  })
);

// This allows the web app to trigger skipWaiting via
// registration.waiting.postMessage({type: 'SKIP_WAITING'})
self.addEventListener('message', (event) => {
  if (event.data && event.data.type === 'SKIP_WAITING') {
    self.skipWaiting();
  }
});

// Any other custom service worker logic can go here.

我发现，即使我删除了src/service worker.js，并且再次删除了
warn build
，它仍然会生成一个build/service worker.js（下面的内容副本），它与原始src/service worker.js完全无关

/**
 * Welcome to your Workbox-powered service worker!
 *
 * You'll need to register this file in your web app and you should
 * disable HTTP caching for this file too.
 *
 * The rest of the code is auto-generated. Please don't update this file
 * directly; instead, make changes to your Workbox build configuration
 * and re-run your build process.
 */

importScripts("https://storage.googleapis.com/workbox-cdn/releases/4.3.1/workbox-sw.js");

importScripts(
  "/precache-manifest.e90b8a1c98bf449d45dd07f902f9c090.js"
);

self.addEventListener('message', (event) => {
  if (event.data && event.data.type === 'SKIP_WAITING') {
    self.skipWaiting();
  }
});

workbox.core.clientsClaim();

/**
 * The workboxSW.precacheAndRoute() method efficiently caches and responds to
 * requests for URLs in the manifest.
 */
self.__precacheManifest = [].concat(self.__precacheManifest || []);
workbox.precaching.precacheAndRoute(self.__precacheManifest, {});

workbox.routing.registerNavigationRoute(workbox.precaching.getCacheKeyForURL("/index.html"), {
  
  blacklist: [/^\/_/,/\/[^/?]+\.[^/]+$/],
});

查看serviceWorkerRegistration.js内部，它正在注册服务工作者：

window.addEventListener（“加载”，（）=>{
const swUrl=`${process.env.PUBLIC\u URL}/service worker.js`；

抱歉，您无法移动此文件（由于Workbox InjectManifest工具，它用静态资产列表替换了
self.\uuuwb\u MANIFEST
）

在使用带有正确模板的CRA后，一切都可以正常工作（当然除了调用
.register（）
方法）

我个人选择不在
src\service.worker.js
中添加太多自定义代码，而是在其中导入我自己的代码（因为它是传输的，所以您可以包含任何您想要的内容）