tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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sw-update-ui.js (1103B)

      1 importScripts('/resources/testharness.js');
      2 importScripts('sw-helpers.js');
      3 
      4 async function updateUI(event) {
      5  let updateParams = [];
      6  switch (event.registration.id) {
      7    case 'update-once':
      8      updateParams = [{title: 'Title1'}];
      9      break;
     10    case 'update-twice':
     11      updateParams = [{title: 'Title1'}, {title: 'Title2'}];
     12      break;
     13  }
     14 
     15  return Promise.all(updateParams.map(param => event.updateUI(param)))
     16           .then(() => 'update success')
     17           .catch(e => e.name);
     18 }
     19 
     20 self.addEventListener('backgroundfetchsuccess', event => {
     21  if (event.registration.id === 'update-inactive') {
     22    // Post an async task before calling updateUI from the inactive event.
     23    // Any async behaviour outside `waitUntil` should mark the event as
     24    // inactive, and subsequent calls to `updateUI` should fail.
     25    new Promise(r => step_timeout(r, 0))
     26        .then(() => event.updateUI({ title: 'New title' }))
     27        .catch(e => sendMessageToDocument({ update: e.name }));
     28    return;
     29  }
     30 
     31  event.waitUntil(updateUI(event)
     32      .then(update => sendMessageToDocument({ update })));
     33 });