An Introduction to Service Workers

Service Workers are the biggest thing to hit the browser since XMLHttpRequest. We'll take a look at what the Service Worker can do for your app and more importantly, your users. We'll see the surprisingly small amount of code you need to get started with a Service Worker and finally we'll take a look at Progressive Web Apps and how the Service Worker will take part in a revolution for web applications.

Links:

HTML5Rocks intro to service worker: http://www.html5rocks.com/en/tutorials/service-worker/introduction/
Service Worker spec: https://slightlyoff.github.io/ServiceWorker/spec/service_worker/
Is Service Worker Ready Yet? https://jakearchibald.github.io/isserviceworkerready/
And resources: https://jakearchibald.github.io/isserviceworkerready/resources.html
Service Worker Cookbook: http://www.serviceworke.rs/

Twilio Blog: Web powered SMS inbox with push notifications: https://www.twilio.com/blog/2016/02/web-powered-sms-inbox-with-service-worker-push-notifications.html
Background sync: https://developers.google.com/web/updates/2015/12/background-sync?hl=en

Transcript

1. AN INTRODUCTION TO SERVICE WORKERS JS Monthly London / April 2016
2. Phil Nash @philnash http:/ /philna.sh philnash@twilio.com
3. AN INTRODUCTION TO SERVICE WORKERS
4. SERVICE WORKERS ARE SCRIPTS THAT INTERCEPT NETWORK REQUESTS
5. SO WEB DEVELOPERS CAN TREAT THE NETWORK AS AN ENHANCEMENT
6. AND PROVIDE OFFLINE EXPERIENCES FOR USERS OF WEB APPLICATIONS
7. A SLIGHTLY LONGER INTRODUCTION TO SERVICE WORKERS
8. XMLHttpRequest
9. IN THE FUTURE WE WILL WONDER HOW WE COPED WITHOUT SERVICE WORKERS
10. THE BIRTH OF THE SERVICE WORKER
11. The Application Cache C A C H E M A N I F E S T # V e r s i o n 7 C A C H E : # S t y l e s h e e t s / s t y l e / a p p . c s s # J a v a S c r i p t s / j s / a p p . j s 0 1 . 0 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 7 . 0 8 .
12. “THE APPLICATION CACHE IS A DOUCHEBAG”
13. The Spec https:/ /slightlyoff.github.io/ServiceWorker/spec/service
14. Browsers 40 27 44
15. SO WHAT DOES IT REALLY DO?
16. Install it n a v i g a t o r . s e r v i c e W o r k e r . r e g i s t e r ( " / s w . j s " ) ;
17. Install it n a v i g a t o r . s e r v i c e W o r k e r . r e g i s t e r ( " / s w . j s " , { s c o p e : " / a d m i n " } ) ; 0 1 . 0 2 . 0 3 .
18. Install it n a v i g a t o r . s e r v i c e W o r k e r . r e g i s t e r ( " / s w . j s " ) . t h e n ( f u n c t i o n ( ) { c o n s o l e . l o g ( " " ) ; } ) . c a t c h ( f u n c t i o n ( ) { c o n s o l e . l o g ( " " ) ; } ) ; 0 1 . 0 2 . 0 3 . 0 4 . 0 5 .
19. It intercepts network requests / / s w . j s s e l f . a d d E v e n t L i s t e n e r ( " f e t c h " , f u n c t i o n ( e v e n t ) { / / d o s o m e t h i n g } ) ; 0 1 . 0 2 . 0 3 . 0 4 .
20. IT'S A PROXY THAT YOU CONTROL
21. SECURITY?
22. HTTPS
23. LOCALHOST
24. DEMO
25. WHY?
26. WEB VS NATIVE
27. Native Web Online by default Offline by default Discoverable on the web App store installation
28. Native Web Offline first Offline by default Discoverable on the web App store installation
29. DON'T CARE FOR OFFLINE?
30. PERFORMANCE
31. FALLBACKS
33. THERE'S MORE!
34. PUSH NOTIFICATIONS
35. DEMO
36. Browsers 42 44
37. WITH GREAT POWER…
38. BACKGROUND SYNC
39. DEMO
40. Browsers 49
41. GEOFENCING
42. MAYBE...?
43. PROGRESSIVE WEB APPS
44. Progressive Web Apps • Service Worker (+ HTTPS) • manifest.json • User engagement
45. APP INSTALL BANNERS
47. ICON ON HOMESCREEN
48. ...
49. $$ PROFIT! $$
50. SERVICE WORKERS
51. ENHANCEMENT
52. IN THE FUTURE WE WILL WONDER HOW WE COPED WITHOUT SERVICE WORKERS
53. 1:13
54. THANKS!
55. Use code PNASH20 for 20% off tickets
56. Help me! On a scale of 0 to 10, how likely is it that you would recommend this talk to a friend or colleague? 020 3322 5761
57. Thanks! @philnash http:/ /philna.sh philnash@twilio.com On a scale of 0 to 10, how likely is it that you would recommend this talk to a friend or colleague? 020 3322 5761