sw.js

var CACHE_NAME = 'static-v1';

self.addEventListener('install', function(e) {
 e.waitUntil(
   caches.open(CACHE_NAME).then(function(cache) {
     return cache.addAll([
        './',
        './index.html',
        './icon.png',
        './estilo.css',
        './index.js',
        './manifest.json',
        './bootstrap.min.css',
     ]);
   })
 );
});

/* Cache on install
this.addEventListener("install", event => {
  this.skipWaiting();

  event.waitUntil(
    caches.open(staticCacheName)
      .then(cache => {
        return cache.addAll(filesToCache);
    })
  )
}); */

self.addEventListener('fetch', function(e) {
  console.log(e.request.url);
  e.respondWith(
    caches.match(e.request).then(function(response) {
      return response || fetch(e.request);
    })
  );
});

self.addEventListener('activate', function activator(event) {
  event.waitUntil(
    caches.keys().then(function (keys) {
      return Promise.all(keys
        .filter(function (key) {
          return key.indexOf(CACHE_NAME) !== 0;
        })
        .map(function (key) {
          return caches.delete(key);
        })
      );
    })
  );
});


/*
var CACHE_NAME = 'static-v1';

self.addEventListener('install', function(e) {
 e.waitUntil(
   caches.open(CACHE_NAME).then(function(cache) {
     return cache.addAll([
        '/',
        '/index.html',
        '/estilo.css',
        '/index.js',
        '/manifest.json',
        '/bootstrap.min.css',
     ]);
   })
 );
});
*/