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PWA 與 Service Worker
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Anna Su
January 23, 2017
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PWA 與 Service Worker
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Anna Su
January 23, 2017
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Transcript
PWA & Service Worker Anna Su 1
Anna Su 獮ᒒૡ纷䒍 綮ਮ螸 PIXNET 2 About me
Why PWA? What's PWA? What's Service Workers Making A Service
Worker 3 Agenda
PWA 4 Why
5 What’s Wrong?
What’s Wrong with Web ? Slow mobile network User-unfriendly 6
What’s Wrong with Web ? Slow mobile network 7 53%
3s
What’s Wrong with Web ? User-unfriendly 8 Splash Screen push
notifications
What’s Wrong with App ? High cost Difficultly share 9
What’s Wrong with App ? High cost 10 iOS Windows
Android
What’s Wrong with App ? Difficultly share 11 from Alex
Russell in Chrome Dev Summit 2015 1 month 25 100+ App Web
What’s Wrong with App ? 12 Alex Russell in Chrome
Dev Summit 2015 ignite online & comScore
13
PWA 14 What’s Progressive Web App
15 Reliable Fast Engaging Reliable
What’s PWA ? Reliable 16
What’s PWA ? Fast 17
What’s PWA ? Engaging 18
Chrome Dev Summit 2014 [github] How does the PWA looks
like 19
20
Service Workers 21 What’s
22 What’s Service Workers ?
What’s Service Workers ? 23
24 What’s Service Workers ?
Service Workers Lifecycle 25
Making A Service Worker 26
27 Making A Service Workers design @Don
simple-pwa-demo PWA To-Do List with Vanilla JS (sw-precache) (sw-precache-webpack-plugin) PWA
To-Do List with React/Redux 28 @Octocat Making A Service Workers code review -Jerry Hong
Getting Started with Service Workers 29
Registering the Service Worker Setting up the Default Cache Clearing
Old Cache Handling Fetch Requests 30 Making A Service Workers
31 Register install activate fetch Making A Service Workers Register
Registering the Service Worker
Registering the Service Worker 32 <script> if ('serviceWorker' in navigator)
{ navigator.serviceWorker.register('/sw.js') .then(reg => console.log('SW registered!', reg)) .catch(err => console.log('Error!', err)); } </script> index.html <script> if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/sw.js') .then(reg => console.log('SW registered!', reg)) .catch(err => console.log('Error!', err)); } </script> <script> if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/sw.js') .then(reg => console.log('SW registered!', reg)) .catch(err => console.log('Error!', err)); } </script> <script> if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/sw.js') .then(reg => console.log('SW registered!', reg)) .catch(err => console.log('Error!', err)); } </script> <script> if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/sw.js') .then(reg => console.log('SW registered!', reg)) .catch(err => console.log('Error!', err)); } </script> <script> if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/sw.js') .then(reg => console.log('SW registered!', reg)) .catch(err => console.log('Error!', err)); } </script>
33 Register install activate fetch Making A Service Workers Register
Service Worker Lifecycle install activate fetch
Getting Started with Service Workers 34 // install self.addEventListener('install', event
=> { console.log('installing…'); }); // activate self.addEventListener('activate', event => { console.log('now ready to handle fetches!'); }); // fetch self.addEventListener('fetch', event => { console.log('now fetch!'); }); sw.js
35 Register install activate fetch Setting up the Default Cache
Making A Service Workers
Setting up the Default Cache 36 sw.js const filesToCache =
[ '/', '/assets/images/btn_check.png', '/assets/images/btn_del.png', '/assets/images/ic_add.png', '/assets/images/logo_todo.png', '/src/main.css', '/index.html' ]; const cacheName = 'todolist-v1';
Setting up the Default Cache 37 sw.js // install self.addEventListener('install',
event => { console.log('installing…'); event.waitUntil( caches.open(cacheName).then(cache => { // console.log('Caching app ok'); return cache.addAll(filesToCache); }) ); }); // install self.addEventListener('install', event => { console.log('installing…'); event.waitUntil( caches.open(cacheName).then(cache => { // console.log('Caching app ok'); return cache.addAll(filesToCache); }) ); }); // install self.addEventListener('install', event => { console.log('installing…'); event.waitUntil( caches.open(cacheName).then(cache => { // console.log('Caching app ok'); return cache.addAll(filesToCache); }) ); }); // install self.addEventListener('install', event => { console.log('installing…'); event.waitUntil( caches.open(cacheName).then(cache => { // console.log('Caching app ok'); return cache.addAll(filesToCache); }) ); }); // install self.addEventListener('install', event => { console.log('installing…'); event.waitUntil( caches.open(cacheName).then(cache => { // console.log('Caching app ok'); return cache.addAll(filesToCache); }) ); });
38 Register install activate fetch Clearing Old Cache Making A
Service Workers
` 39 // activate self.addEventListener('activate', event => { console.log('now ready
to handle fetches!'); event.waitUntil( caches.keys().then(function(cacheNames) { var promiseArr = cacheNames.map(function(item) { if (item !== cacheName) { // Delete that cached file return caches.delete(item); } }) return Promise.all(promiseArr); }) ); // end e.waitUntil }); sw.js // activate self.addEventListener('activate', event => { console.log('now ready to handle fetches!'); event.waitUntil( caches.keys().then(function(cacheNames) { var promiseArr = cacheNames.map(function(item) { if (item !== cacheName) { // Delete that cached file return caches.delete(item); } }) return Promise.all(promiseArr); }) ); // end e.waitUntil }); // activate self.addEventListener('activate', event => { console.log('now ready to handle fetches!'); event.waitUntil( caches.keys().then(function(cacheNames) { var promiseArr = cacheNames.map(function(item) { if (item !== cacheName) { // Delete that cached file return caches.delete(item); } }) return Promise.all(promiseArr); }) ); // end e.waitUntil }); // activate self.addEventListener('activate', event => { console.log('now ready to handle fetches!'); event.waitUntil( caches.keys().then(function(cacheNames) { var promiseArr = cacheNames.map(function(item) { if (item !== cacheName) { // Delete that cached file return caches.delete(item); } }) return Promise.all(promiseArr); }) ); // end e.waitUntil }); // activate self.addEventListener('activate', event => { console.log('now ready to handle fetches!'); event.waitUntil( caches.keys().then(function(cacheNames) { var promiseArr = cacheNames.map(function(item) { if (item !== cacheName) { // Delete that cached file return caches.delete(item); } }) return Promise.all(promiseArr); }) ); // end e.waitUntil });
40 Register install activate fetch Handling Fetch Requests Making A
Service Workers
41 <script> const list = document.getElementById('list'); // 矑茐咳蝑 request fetch('http://localhost:3000/people')
.then(res => { return res.json(); }) .then(json => { list.innerHTML = json .map(item => `<li>${item.name}</li>`) .join(''); }) </script> index.html Handling Fetch Requests
Handling Fetch Requests 42 self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request)
.then(function(response) { return response || fetch(event.request) .then(res => caches.open(dataCacheName) .then(function(cache) { cache.put(event.request, res.clone()); return res; }) ); }) ); }); sw.js self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(function(response) { return response || fetch(event.request) .then(res => caches.open(dataCacheName) .then(function(cache) { cache.put(event.request, res.clone()); return res; }) ); }) ); }); self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(function(response) { return response || fetch(event.request) .then(res => caches.open(dataCacheName) .then(function(cache) { cache.put(event.request, res.clone()); return res; }) ); }) ); }); self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(function(response) { return response || fetch(event.request) .then(res => caches.open(dataCacheName) .then(function(cache) { cache.put(event.request, res.clone()); return res; }) ); }) ); }); self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(function(response) { return response || fetch(event.request) .then(res => caches.open(dataCacheName) .then(function(cache) { cache.put(event.request, res.clone()); return res; }) ); }) ); }); self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(function(response) { return response || fetch(event.request) .then(res => caches.open(dataCacheName) .then(function(cache) { cache.put(event.request, res.clone()); return res; }) ); }) ); }); self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(function(response) { return response || fetch(event.request) .then(res => caches.open(dataCacheName) .then(function(cache) { cache.put(event.request, res.clone()); return res; }) ); }) ); }); self.addEventListener('fetch', event => { event.respondWith( caches.match(event.request) .then(function(response) { return response || fetch(event.request) .then(res => caches.open(dataCacheName) .then(function(cache) { cache.put(event.request, res.clone()); return res; }) ); }) ); });
43
44
Learn more? 45
46
47
48
49
50
傶Ջ讕襑ᥝ PWA? Ջ讕ฎ PWA? Service Work 墋Օ Registering the Service
Worker Setting up the Default Cache Clearing Old Cache Handling Fetch Requests 䋿֢ PWA To-Do List - 氥纈盃旰Ԫ殻竃㻌 51 2017 iT 螸䒻盜裡Ո搴ᒍ
ref https://huangxuan.me/pwa-qcon2016/#/ https://medium.com/lets-grow-business/why- progressive-web-app-31dd11d9a925#.zb3d2m1jv https://igniteonline.com.au/why-progressive-web- apps-beat-native-apps-hands-down/ 52
ref images http://ninetailsfoxchan.deviantart.com/art/Sad- Png-by-NFC-304044918 http://mrmen.wikia.com/wiki/File:Mr._All- Goes_Wrong.PNG https://goo.gl/022j4n https://www.labnol.org/software/chrome-offline- dinosaur-game/28781/ 53
Thanks 眤蘛肔肯 54