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content / test / data / back_forward_cache / service_worker_registration.html [blame]
<html>
<title>service worker registration</title>
<script>
async function register(worker_url, scope) {
try {
const init = scope ? {scope} : {};
await navigator.serviceWorker.register(worker_url, init);
await navigator.serviceWorker.ready;
return 'DONE';
} catch (error) {
return `${error}`;
}
}
async function unregister(scope) {
try {
const registration = await navigator.serviceWorker.getRegistration(scope);
if (!registration)
return 'REGISTRATION NOT FOUND';
registration.unregister();
return 'DONE';
} catch (error) {
return `${error}`;
}
}
async function claim() {
try {
const registration = await navigator.serviceWorker.ready;
const claimed = new Promise(resolve => {
navigator.serviceWorker.oncontrollerchange = (event) => {
resolve();
};
});
registration.active.postMessage('claim');
await claimed;
return 'DONE';
} catch (error) {
return `${error}`;
}
}
</script>
</html>