An Introduction to Service Workers - Gumtree Tech Talks

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

The Service Worker trailer: https://www.youtube.com/watch?v=QiXLaisCq10

Transcript

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