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importScripts('/resources/testharness.js');
importScripts('sw-helpers.js');
async function updateUI(event) {
let updateParams = [];
switch (event.registration.id) {
case 'update-once':
updateParams = [{title: 'Title1'}];
break;
case 'update-twice':
updateParams = [{title: 'Title1'}, {title: 'Title2'}];
break;
}
return Promise.all(updateParams.map(param => event.updateUI(param)))
.then(() => 'update success')
.catch(e => e.name);
}
self.addEventListener('backgroundfetchsuccess', event => {
if (event.registration.id === 'update-inactive') {
// Post an async task before calling updateUI from the inactive event.
// Any async behaviour outside `waitUntil` should mark the event as
// inactive, and subsequent calls to `updateUI` should fail.
new Promise(r => step_timeout(r, 0))
.then(() => event.updateUI({ title: 'New title' }))
.catch(e => sendMessageToDocument({ update: e.name }));
return;
}
event.waitUntil(updateUI(event)
.then(update => sendMessageToDocument({ update })));
});