Commit 166fa885 authored by Mattias J Duffy's avatar Mattias J Duffy

updating service worker to the newest one depoyed with react scripts

parent 81b311ca
// In production, we register a service worker to serve assets from local cache. // 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 // This lets the app load faster on subsequent visits in production, and gives
// it offline capabilities. However, it also means that developers (and users) // 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 // will only see deployed updates on the "N+1" visit to a page, since previously
// cached resources are updated in the background. // 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
// To learn more about the benefits of this model, read https://goo.gl/KwvDNy. // instructions on opting out of this behavior.
// This link also includes instructions on opting out of this behavior.
const isLocalhost = Boolean( const isLocalhost = Boolean(window.location.hostname === 'localhost' ||
window.location.hostname === 'localhost' || // [::1] is the IPv6 localhost address.
// [::1] is the IPv6 localhost address. window.location.hostname === '[::1]' ||
window.location.hostname === '[::1]' || // 127.0.0.1/8 is considered localhost for IPv4.
// 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}$/));
window.location.hostname.match(
/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
)
);
export default function register() { export default function register() {
if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) { if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
// The URL constructor is available in all browsers that support SW. // The URL constructor is available in all browsers that support SW.
const publicUrl = new URL(process.env.PUBLIC_URL, window.location); const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
if (publicUrl.origin !== window.location.origin) { if (publicUrl.origin !== window.location.origin) {
// Our service worker won't work if PUBLIC_URL is on a different origin // Our service worker won't work if PUBLIC_URL is on a different origin from
// from what our page is served on. This might happen if a CDN is used to // what our page is served on. This might happen if a CDN is used to serve
// serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374 // assets; see https://github.com/facebookincubator/create-react-app/issues/2374
return; return;
} }
window.addEventListener('load', () => { window.addEventListener('load', () => {
const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`; const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
if (!isLocalhost) { if (isLocalhost) {
// This is running on localhost. Lets check if a service worker still exists or
// not.
checkValidServiceWorker(swUrl);
// Add some additional logging to localhost, pointing developers to the service
// worker/PWA documentation.
navigator
.serviceWorker
.ready
.then(() => {
console.log('This web app is being served cache-first by a service worker. To learn more, vis' +
'it https://goo.gl/SC7cgQ');
});
} else {
// Is not local host. Just register service worker // Is not local host. Just register service worker
registerValidSW(swUrl); registerValidSW(swUrl);
} else {
// This is running on localhost. Lets check if a service worker still exists or not.
checkValidServiceWorker(swUrl);
} }
}); });
} }
} }
function registerValidSW(swUrl) { function registerValidSW(swUrl) {
navigator.serviceWorker navigator
.serviceWorker
.register(swUrl) .register(swUrl)
.then((registration) => { .then((registration) => {
registration.onupdatefound = () => { registration.onupdatefound = () => {
...@@ -52,15 +58,13 @@ function registerValidSW(swUrl) { ...@@ -52,15 +58,13 @@ function registerValidSW(swUrl) {
installingWorker.onstatechange = () => { installingWorker.onstatechange = () => {
if (installingWorker.state === 'installed') { if (installingWorker.state === 'installed') {
if (navigator.serviceWorker.controller) { if (navigator.serviceWorker.controller) {
// At this point, the old content will have been purged and // At this point, the old content will have been purged and the fresh content
// the fresh content will have been added to the cache. // will have been added to the cache. It's the perfect time to display a "New
// It's the perfect time to display a "New content is // content is available; please refresh." message in your web app.
// available; please refresh." message in your web app.
console.log('New content is available; please refresh.'); console.log('New content is available; please refresh.');
} else { } else {
// At this point, everything has been precached. // At this point, everything has been precached. It's the perfect time to
// It's the perfect time to display a // display a "Content is cached for offline use." message.
// "Content is cached for offline use." message.
console.log('Content is cached for offline use.'); console.log('Content is cached for offline use.');
} }
} }
...@@ -74,34 +78,37 @@ function registerValidSW(swUrl) { ...@@ -74,34 +78,37 @@ function registerValidSW(swUrl) {
function checkValidServiceWorker(swUrl) { function checkValidServiceWorker(swUrl) {
// Check if the service worker can be found. If it can't reload the page. // Check if the service worker can be found. If it can't reload the page.
fetch(swUrl) fetch(swUrl).then((response) => {
.then((response) => {
// Ensure service worker exists, and that we really are getting a JS file. // Ensure service worker exists, and that we really are getting a JS file.
if ( if (response.status === 404 || response.headers.get('content-type').indexOf('javascript') === -1) {
response.status === 404 ||
response.headers.get('content-type').indexOf('javascript') === -1
) {
// No service worker found. Probably a different app. Reload the page. // No service worker found. Probably a different app. Reload the page.
navigator.serviceWorker.ready.then((registration) => { navigator
registration.unregister().then(() => { .serviceWorker
window.location.reload(); .ready
.then((registration) => {
registration
.unregister()
.then(() => {
window
.location
.reload();
}); });
}); });
} else { } else {
// Service worker found. Proceed as normal. // Service worker found. Proceed as normal.
registerValidSW(swUrl); registerValidSW(swUrl);
} }
}) }).catch(() => {
.catch(() => { console.log('No internet connection found. App is running in offline mode.');
console.log(
'No internet connection found. App is running in offline mode.'
);
}); });
} }
export function unregister() { export function unregister() {
if ('serviceWorker' in navigator) { if ('serviceWorker' in navigator) {
navigator.serviceWorker.ready.then((registration) => { navigator
.serviceWorker
.ready
.then((registration) => {
registration.unregister(); registration.unregister();
}); });
} }
......
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