离线时空白页

如何解决离线时空白页

当我离线时，我只能看到一个空白页。我一直在尝试从offline.html删除清单，但是没有用。我认为我在offline.html中写错了。但是我不知道是什么。帮我。我做错了什么？

https://thirsty-hopper-b0ad0a.netlify.app/

＃serviceworker.js

const CACHE_NAME = "version-1";
const urlsToCache = [ 'index.html','offline.html' ];

const self = this;

// Install SW
self.addEventListener('install',(event) => {
    event.waitUntil(
        caches.open(CACHE_NAME)
            .then((cache) => {
                console.log('Opened cache');

                return cache.addAll(urlsToCache);
            })
    )
});

// Listen for requests
self.addEventListener('fetch',(event) => {
    event.respondWith(
        caches.match(event.request)
            .then(() => {
                return fetch(event.request) 
                    .catch(() => caches.match('offline.html'))
            })
    )
});

// Activate the SW
self.addEventListener('activate',(event) => {
    const cacheWhitelist = [];
    cacheWhitelist.push(CACHE_NAME);

    event.waitUntil(
        caches.keys().then((cacheNames) => Promise.all(
            cacheNames.map((cacheName) => {
                if(!cacheWhitelist.includes(cacheName)) {
                    return caches.delete(cacheName);
                }
            })
        ))
            
    )
});

＃manifest.json

{
  "short_name": "Pizza Joint","name": "Pizza Joint","icons": [
      {
      "src":"./icons/android-chrome-192x192.png","sizes":"192x192","type":"image/png"
  },{
      "src":"./icons/android-chrome-512x512.png","sizes":"512x512",{
      "src":"./icons/apple-touch-icon.png","sizes":"180x180",{
      "src":"./icons/favicon-16x16.png","sizes":"16x16",{
      "src":"./icons/favicon-32x32.png","sizes":"32x32","type":"image/png"
  }
  ],"start_url": "/","display": "standalone","theme_color": "#161616","background_color": "#161616"
}

＃index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <link rel="icon" href="./icons/favicon.ico" />
    <meta name="viewport" content="width=device-width,initial-scale=1" />
    <meta name="theme-color" content="#161616" />
    <meta name="description" content="Best app for ordering your favorite pizza" />
    <link rel="apple-touch-icon" href="./icons/apple-touch-icon.png" />
    <link rel="manifest" href="./manifest.json" />  

    <title>Pizza Joint</title>
  </head>
  <body>
    <noscript>You need to enable JavaScript to run this app.</noscript>
    <div id="root"></div>
    
    <script>
      if ('serviceWorker' in navigator) {
        window.addEventListener('load',() => {
          navigator.serviceWorker.register('./serviceworker.js')
            .then((reg) => console.log('Success: ',reg.scope))
            .catch((err) => console.log('Failure: ',err));
        });
      } else {
        console.log('Service Worker is not supported by browser.');
      }
    </script>
  </body>
</html>

＃offline.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <link rel="icon" href="./icons/favicon.ico" />
    <meta name="viewport" content="width=device-width,initial-scale=1" />
    <meta name="theme-color" content="#161616" />
    <meta name="description" content="Best app for ordering your favorite pizza" />
    <link rel="apple-touch-icon" href="./icons/apple-touch-icon.png" /> 
    
    <title>Pizza Joint</title>
  </head>
  <body>
    <noscript>You need to enable JavaScript to run this app.</noscript>
    <div id="root"></div>
   
    <script>
      if ('serviceWorker' in navigator) {
        window.addEventListener('load',err));
        });
      } else {
        console.log('Service Worker is not supported by browser.');
      }
    </script>
  </body>
</html>

如何解决离线时空白页

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