An Introduction to Service Workers at The Web Meetup

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://github.com/w3c/ServiceWorker
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
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 CACHE MANIFEST # Version 7 CACHE: # Stylesheets /style/app.css # JavaScripts /js/app.js 01. 02. 03. 04. 05. 06. 07. 08.
12. “THE APPLICATION CACHE IS A DOUCHEBAG”
13. The Spec https:/ /w3c.github.io/ServiceWorker/
14. Browsers 40 27 44 4
15. The other browsers? preview 17 beta iOS 11.3 macOS 10.13.4
16. SO WHAT DOES IT REALLY DO?
17. Install it navigator.serviceWorker.register("/sw.js");
18. Install it navigator.serviceWorker.register("/sw.js", { scope: "/admin" }); 01. 02. 03.
19. Install it navigator.serviceWorker.register("/sw.js").then(function(){ console.log(" "); }).catch(function(){ console.log(" "); }); 01. 02. 03. 04. 05.
20. It intercepts network requests // sw.js self.addEventListener("fetch", function(event) { // do something }); 01. 02. 03. 04.
21. IT'S A PROXY THAT YOU CONTROL
22. SECURITY?
23. HTTPS
24. LOCALHOST
25. DEMO
26. WHY?
27. WEB VS NATIVE
28. Native Web Online by default Offline by default Discoverable on the web App store installation
29. Native Web Offline first Offline by default Discoverable on the web App store installation
30. DON'T CARE FOR OFFLINE?
31. PERFORMANCE
32. FALLBACKS
34. PUSH NOTIFICATIONS
35. DEMO
36. Browsers 42 44 37 4 preview 17
37. WITH GREAT POWER…
38. BACKGROUND SYNC
39. DEMO
40. Browsers 49 5.4
41. PROGRESSIVE WEB APPS
42. Progressive Web Apps • Service Worker (+ HTTPS) • manifest.json • User engagement
43. APP INSTALL BANNERS
45. ICON ON HOMESCREEN
46. ...
47. $$ PROFIT! $$
48. SERVICE WORKERS
49. SERVICE WORKERS ARE SCRIPTS THAT INTERCEPT NETWORK REQUESTS
50. SO WEB DEVELOPERS CAN TREAT THE NETWORK AS AN ENHANCEMENT
51. AND PROVIDE OFFLINE EXPERIENCES FOR USERS OF WEB APPLICATIONS
52. AND PROVIDE OFFLINE EXPERIENCES FOR USERS OF WEB APPLICATIONS
53. AND PROVIDE BETTER EXPERIENCES FOR USERS OF WEB APPLICATIONS
54. IN THE FUTURE WE WILL WONDER HOW WE COPED WITHOUT SERVICE WORKERS
55. AND IF YOU'RE NOT YET CONVINCED...
57. THANKS!
58. Thanks! @philnash http:/ /philna.sh philnash@twilio.com