Periodic Background Sync

Transcript

1. Periodic Background Sync Periodic Background Sync

2. None

3. Background Sync self.on('sync', (e) => { // retry failed request

   while // offline in background })

4. Periodic Background Sync self.on('periodic-sync', (e) => { // periodically refresh

   contents // up to date in background. })

5. Use Case - Podcast Feed Update

6. // register PBS const name = 'periodic-background-sync' const status =

   await navigator.permissions.query({name}) if (status.state === 'granted') { await registration.periodicSync.register('refresh', { minInterval: 12 * 60 * 60 * 1000 // 12h }) }

7. Security Consideration

8. #4: 156.74.xxx.xxx #1: 14.102.xxx.xxx #2: 81.177.xxx.xxx #3: 24.152.xxx.xxx Background Sync

   Tracking also • crypto mining • bot net

9. Known Network

10. Permission In Chrome

11. Permission Model Permission Dialog ? User Gesture ? Feature Policy

    ? Add to Home Screen !!

12. Native App Permission -> Install Web App Permission -> Install

13. Restriction In Chrome

14. • Periodic depends on site-engagement. • Only fire under known

    network.

15. Site Engagement

16. Periodic Background Sync enables... • Installed App via A2HS •

    Enough Site-Engagement • Connected to Known Network • Android Chrome only

17. Work in progress...

18. None