javascript - VueJS service-worker.js 在我的 PWA 中被忽略

Question

我用 VueJS 创建了一个渐进式网络应用程序，文件由 vuecli 生成。所以我有默认的 registerServiceWorker.js 我只是评论环境条件:

/* eslint-disable no-console */

import { register } from 'register-service-worker'

// if (process.env.NODE_ENV === 'production') {
  register(`${process.env.BASE_URL}service-worker.js`, {
    ready () {
      console.log(
        'App is being served from cache by a service worker.\n' +
        'For more details, visit https://...'
      )
    },
    registered () {
      console.log('Service worker has been registered.')
    },
    cached () {
      console.log('Content has been cached for offline use.')
    },
    updatefound () {
      console.log('New content is downloading.')
    },
    updated () {
      console.log('New content is available; please refresh.')
    },
    offline () {
      console.log('No internet connection found. App is running in offline mode.')
    },
    error (error) {
      console.error('Error during service worker registration:', error)
    }
  })
// }

这是我的简单 service-worker.js

const PRECACHE = 'precache-v1';
const RUNTIME = 'runtime';

// A list of local resources we always want to be cached.
const PRECACHE_URLS = [

];

// The install handler takes care of precaching the resources we always need.
self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(PRECACHE)
      .then(cache => cache.addAll(PRECACHE_URLS))
      .then(self.skipWaiting())
  );
});

// The activate handler takes care of cleaning up old caches.
self.addEventListener('activate', event => {
  const currentCaches = [PRECACHE, RUNTIME];
  event.waitUntil(
    caches.keys().then(cacheNames => {
      return cacheNames.filter(cacheName => !currentCaches.includes(cacheName));
    }).then(cachesToDelete => {
      return Promise.all(cachesToDelete.map(cacheToDelete => {
        return caches.delete(cacheToDelete);
      }));
    }).then(() => self.clients.claim())
  );
});

// The fetch handler serves responses for same-origin resources from a cache.
// If no response is found, it populates the runtime cache with the response
// from the network before returning it to the page.
self.addEventListener('fetch', event => {
  // Skip cross-origin requests, like those for Google Analytics.
  if (event.request.url.startsWith(self.location.origin)) {
    event.respondWith(
      caches.match(event.request).then(cachedResponse => {
        if (cachedResponse) {
          return cachedResponse;
        }

        return caches.open(RUNTIME).then(cache => {
          return fetch(event.request).then(response => {
            // Put a copy of the response in the runtime cache.
            return cache.put(event.request, response.clone()).then(() => {
              return response;
            });
          });
        });
      })
    );
  }
});

当我启动我的应用程序时，如果我查看 chrome 控制台，另一个 service-worker.js 会覆盖我的。如果在我的项目中，我不明白这个服务人员是什么:

/* global self */

// This service worker file is effectively a 'no-op' that will reset any
// previous service worker registered for the same host:port combination.

// It is read and returned by a dev server middleware that is only loaded
// during development.

// In the production build, this file is replaced with an actual service worker
// file that will precache your site's local assets.

self.addEventListener('install', () => self.skipWaiting())

self.addEventListener('activate', () => {
  self.clients.matchAll({ type: 'window' }).then(windowClients => {
    for (const windowClient of windowClients) {
      // Force open pages to refresh, so that they have a chance to load the
      // fresh navigation response from the local dev server.
      windowClient.navigate(windowClient.url)
    }
  })
})

我如何使用我的 Service Worker？

Answer 1

这似乎确实是故意的。如果你真的想测试你的服务 worker ，那么可以随意将文件名更改为与默认名称不同的名称:service-worker.js，例如 service-worker- dev.js。这样做的原因是在开发模式下使用服务 worker 会导致极其困惑的调试情况。

Note that there is a hint in the comment of the replacement service-worker:

// This service worker file is effectively a 'no-op' that will reset any
// previous service worker registered for the same host:port combination.

// It is read and returned by a dev server middleware that is only loaded
// during development.

// In the production build, this file is replaced with an actual service worker
// file that will precache your site's local assets.

一旦您对 service-worker 的工作感到满意，您就会喜欢这样一个事实，即您可以在开发模式下完全禁用它:-)希望这对您有所帮助!