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claim clients immediately from service worker

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This commit is contained in:
Bruno Windels 2020-10-16 14:52:34 +02:00
parent 743cdd0bea
commit 0ca926d427
2 changed files with 24 additions and 7 deletions
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7
src/service-worker.template.js
View File

@ -61,7 +61,12 @@ async function purgeOldCaches() {
}
self.addEventListener('activate', (event) => {
event.waitUntil(purgeOldCaches());
event.waitUntil(Promise.all([
purgeOldCaches(),
// on a first page load/sw install,
// start using the service worker on all pages straight away
self.clients.claim()
]));
});
self.addEventListener('fetch', (event) => {

14
src/ui/web/dom/ServiceWorkerHandler.js
View File

@ -25,6 +25,7 @@ export class ServiceWorkerHandler {
this._registration = null;
this._navigation = navigation;
this._registrationPromise = null;
this._currentController = null;
}
registerAndStart(path) {
@ -32,6 +33,8 @@ export class ServiceWorkerHandler {
navigator.serviceWorker.addEventListener("message", this);
navigator.serviceWorker.addEventListener("controllerchange", this);
this._registration = await navigator.serviceWorker.register(path);
await navigator.serviceWorker.ready;
this._currentController = navigator.serviceWorker.controller;
this._registrationPromise = null;
console.log("Service Worker registered");
this._registration.addEventListener("updatefound", this);
@ -76,7 +79,9 @@ export class ServiceWorkerHandler {
}
async _tryActivateUpdate() {
if (this._registration.waiting && this._registration.active) {
// we don't do confirm when the tab is hidden because it will block the event loop and prevent
// events from the service worker to be processed (like controllerchange when the visible tab applies the update).
if (!document.hidden && this._registration.waiting && this._registration.active) {
this._registration.waiting.removeEventListener("statechange", this);
const version = await this._sendAndWaitForReply("version", null, this._registration.waiting);
if (confirm(`Version ${version.version} (${version.buildHash}) is ready to install. Apply now?`)) {
@ -98,11 +103,18 @@ export class ServiceWorkerHandler {
this._tryActivateUpdate();
break;
case "controllerchange":
if (!this._currentController) {
// Clients.claim() in the SW can trigger a controllerchange event
// if we had no SW before. This is fine,
// and now our requests will be served from the SW.
this._currentController = navigator.serviceWorker.controller;
} else {
// active service worker changed,
// refresh, so we can get all assets
// (and not some if we would not refresh)
// up to date from it
document.location.reload();
}
break;
}
}