An Introduction to Service Workers - Refresh 2016

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:

Offline apps course on Udacity: https://www.udacity.com/course/offline-web-applications--ud899

The demo SMS app: https://github.com/philnash/sms-messages-app

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/
Addy Osmani - Offline Storage for Progressive Web Apps - https://bit.ly/cache-vs-db

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
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
8. A SLIGHTLY LONGER INTRODUCTION TO SERVICE WORKERS
9. XMLHttpRequest
10. IN THE FUTURE WE WILL WONDER HOW WE COPED WITHOUT SERVICE WORKERS
11. THE BIRTH OF THE SERVICE WORKER
12. The Application Cache CACHE MANIFEST # Version 7 CACHE: # Stylesheets /style/app.css # JavaScripts /js/app.js 01. 02. 03. 04. 05. 06. 07. 08.
13. “THE APPLICATION CACHE IS A DOUCHEBAG”
14. The Spec https:/ /slightlyoff.github.io/ServiceWorker/spec/service_worker/
15. Browsers 40 27 44 4
16. The other browsers? preview under consideration
17. SO WHAT DOES IT REALLY DO?
18. Install it navigator.serviceWorker.register("/sw.js");
19. Install it navigator.serviceWorker.register("/sw.js", { scope: "/admin" }); 01. 02. 03.
20. Install it navigator.serviceWorker.register("/sw.js").then(function(){ console.log(" "); }).catch(function(){ console.log(" "); }); 01. 02. 03. 04. 05.
21. It intercepts network requests // sw.js self.addEventListener("fetch", function(event) { // do something }); 01. 02. 03. 04.
22. IT'S A PROXY THAT YOU CONTROL
23. SECURITY?
24. HTTPS
25. LOCALHOST
26. DEMO
27. WHY?
28. WEB VS NATIVE
29. Native Web Online by default Offline by default Discoverable on the web App store installation
30. Native Web Offline first Offline by default Discoverable on the web App store installation
31. DON'T CARE FOR OFFLINE?
32. PERFORMANCE
33. FALLBACKS
35. PUSH NOTIFICATIONS
36. DEMO
37. Browsers 42 44 37 4
38. WITH GREAT POWER…
39. BACKGROUND SYNC
40. DEMO
41. Browsers 49
42. GEOFENCING
43. MAYBE...?
44. PROGRESSIVE WEB APPS
45. Progressive Web Apps • Service Worker (+ HTTPS) • manifest.json • User engagement
46. APP INSTALL BANNERS
48. ICON ON HOMESCREEN
49. ...
50. $$ PROFIT! $$
51. SERVICE WORKERS
52. ENHANCEMENT
53. AN INTRODUCTION TO SERVICE WORKERS
54. SERVICE WORKERS ARE SCRIPTS THAT INTERCEPT NETWORK REQUESTS
55. SO WEB DEVELOPERS CAN TREAT THE NETWORK AS AN ENHANCEMENT
56. AND PROVIDE OFFLINE EXPERIENCES FOR USERS OF WEB APPLICATIONS
57. AND PROVIDE OFFLINE EXPERIENCES FOR USERS OF WEB APPLICATIONS
58. AND PROVIDE BETTER EXPERIENCES FOR USERS OF WEB APPLICATIONS
59. IN THE FUTURE WE WILL WONDER HOW WE COPED WITHOUT SERVICE WORKERS
60. AND IF YOU'RE NOT YET CONVINCED...
61. 0:00 / 1:13
62. THANKS!
64. Use the code PNASH20 for 20% off ticket prices
65. Thanks! @philnash http:/ /philna.sh philnash@twilio.com