sometimes when i run my server the console gives me an error:
Failed to load ‘http://localhost:3000/browser-sync/socket.io/?EIO=3&transport=polling&t=Lm2wn4p’. A ServiceWorker passed a promise to FetchEvent.respondWith() that resolved with non-Response value ‘undefined’.
and i don't know what happend,
Service-worker.js :
importScripts('assets/js/cache-polyfill.js'); var CACHE_VERSION = 'app-v1'; var CACHE_FILES = [ 'index.html' ]; self.addEventListener('install', function (event) { event.waitUntil( caches.open(CACHE_VERSION) .then(function (cache) { console.log('Opened cache'); return cache.addAll(CACHE_FILES); }) ); }); self.addEventListener('activate', function (event) { event.waitUntil( caches.keys().then(function(keys){ return Promise.all(keys.map(function(key, i){ if(key !== CACHE_VERSION){ return caches.delete(keys[i]); } })) }) ) }); self.addEventListener('fetch', function (event) { event.respondWith( caches.match(event.request).then(function(res){ if(res){ return res; } requestBackend(event); }) ) }); function requestBackend(event){ var url = event.request.clone(); return fetch(url).then(function(res){ //if not a valid response send the error if(!res || res.status !== 200 || res.type !== 'basic'){ return res; } var response = res.clone(); caches.open(CACHE_VERSION).then(function(cache){ cache.put(event.request, response); }); return res; }) } any idea or solution?
