Update Service Worker to new version immediately

src/registerServiceWorker.js

@@ -1,21 +1,11 @@
-// In production, we register a service worker to serve assets from local cache.
-
-// This lets the app load faster on subsequent visits in production, and gives
-// it offline capabilities. However, it also means that developers (and users)
-// will only see deployed updates on the "N+1" visit to a page, since previously
-// cached resources are updated in the background.
-
-// To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
-// This link also includes instructions on opting out of this behavior.
-
 const isLocalhost = Boolean(
  window.location.hostname === "localhost" ||
-  // [::1] is the IPv6 localhost address.
-  window.location.hostname === "[::1]" ||
-  // 127.0.0.1/8 is considered localhost for IPv4.
-  window.location.hostname.match(
-  /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
-  )
+ // [::1] is the IPv6 localhost address.
+ window.location.hostname === "[::1]" ||
+ // 127.0.0.1/8 is considered localhost for IPv4.
+ window.location.hostname.match(
+ /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+ )
 );
 
 export default function register() {
@@ -41,7 +31,7 @@ export default function register() {
  navigator.serviceWorker.ready.then(() => {
  console.log(
  "This web app is being served cache-first by a service " +
-  "worker. To learn more, visit https://goo.gl/SC7cgQ"
+ "worker. To learn more, visit https://goo.gl/SC7cgQ"
  );
  });
  } else {
@@ -56,19 +46,36 @@ function registerValidSW(swUrl) {
  navigator.serviceWorker
  .register(swUrl)
  .then(registration => {
+ registration.onupdatefound = () => {
+ const installingWorker = registration.installing;
+ if (installingWorker == null) {
+ return;
+ }
+ installingWorker.onstatechange = () => {
+ if (installingWorker.state === 'installed') {
+ if (navigator.serviceWorker.controller) {
+ // New content is available and will be used when all tabs for this page are closed.
+ console.log('New content is available; please refresh.');
 
- registration.addEventListener('updatefound', () => {
- const newWorker = registration.installing;
- newWorker.addEventListener('statechange', () => {
- if(newWorker.state==="installed"){
- newWorker.postMessage({type: 'SKIP_WAITING'});
- }
- });
- });
+ // Optionally, you can force the new content to be active immediately:
+ // Uncomment the line below to apply the new version immediately
+ window.location.reload();
 
+ // Notify the user of the update.
+ // You can customize this notification as needed.
+ // if (confirm('New version available. Refresh now?')) {
+ // window.location.reload();
+ // }
+ } else {
+ // Content is cached for offline use.
+ console.log('Content is cached for offline use.');
+ }
+ }
+ };
+ };
  })
  .catch(error => {
-  console.error('Error during service worker registration:', error);
+ console.error('Error during service worker registration:', error);
  });
 }
 
@@ -77,9 +84,10 @@ function checkValidServiceWorker(swUrl) {
  fetch(swUrl)
  .then(response => {
  // Ensure service worker exists, and that we really are getting a JS file.
+ const contentType = response.headers.get("content-type");
  if (
  response.status === 404 ||
- response.headers.get("content-type").indexOf("javascript") === -1
+ (contentType && contentType.indexOf("javascript") === -1)
  ) {
  // No service worker found. Probably a different app. Reload the page.
  navigator.serviceWorker.ready.then(registration => {