Browsers behind your back at MelbJS

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BROWSERS BEHIND YOUR BACK

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PHIL NASH @philnash http:/ /philna.sh [email protected]

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BROWSERS BEHIND YOUR BACK

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EMAIL IS PRETTY COOL @philnash

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No content

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ON THE WEB? @philnash

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PROGRESSIVE WEB APPS

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@philnash

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SENDING MESSAGES @philnash

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LIKE OR FAVOURITE @philnash

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ADD SHOPPING TO CART @philnash

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LEAVING A COMMENT @philnash

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@philnash

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BACKGROUND SYNC API

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BACKGROUND SYNC API • Service Worker • IndexedDB • Sync Event @philnash

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DEMO

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SERVICE WORKER

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@philnash

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@philnash

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@philnash

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INDEXEDDB

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@philnash

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OBJECT STORE @philnash

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ASYNCHRONOUS @philnash

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TRANSACTIONAL @philnash

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LOW LEVEL @philnash

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USE A LIBRARY • idb • localForage • Dexie • PouchDB @philnash

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SERVICE WORKERS LOVE PROMISES @philnash

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CALLBACKS var request = indexedDB.open('messages', 1) request.onupgradeneeded = function(event) { var upgradeDb = event.result.target; upgradeDb.createObjectStore('outbox', { autoIncrement : true, keyPath: 'id' }); } request.onsuccess = function(event) { window.db = event.result.target; } 01. 02. 03. 04. 05. 06. 07. 08. 09. 10. @philnash

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PROMISES idb.open('messages', 1, function(upgradeDb) { upgradeDb.createObjectStore('outbox', { autoIncrement : true, keyPath: 'id' }); }).then(function(db) { return window.db = db; }) 01. 02. 03. 04. 05. 06. 07. @philnash

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DEMO

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BACKGROUND SYNC API

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@philnash

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@philnash

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BACK ONLINE API

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SUPPORT 49 5.4 devdevdev ? @philnash

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ON THE PAGE navigator.serviceWorker.ready.then(function(reg) { reg.sync.register('back-online'); }); 01. 02. 03. @philnash

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IN THE SERVICE WORKER self.addEventListener('sync', function(event) { if (event.tag === 'back-online') { // do something } }); 01. 02. 03. 04. 05. @philnash

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DEMO

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THE FUTURE

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PERIODIC SYNC API

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ON THE PAGE navigator.serviceWorker.ready.then(function(reg) { reg.periodicSync.register({ tag: 'get-latest-news', // default: '' minPeriod: 12 * 60 * 60 * 1000, // default: 0 powerState: 'avoid-draining', // default: 'auto' networkState: 'avoid-cellular' // default: 'online' }); }); 01. 02. 03. 04. 05. 06. 07. 08. @philnash

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IN THE SERVICE WORKER self.addEventListener('periodicsync', function(event) { if (event.tag === 'get-latest-news') { // get the latest news! } }); 01. 02. 03. 04. 05. @philnash

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BACKGROUND FETCH API

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ON THE PAGE navigator.serviceWorker.ready.then(function(reg) { const url = "https://example.com/largeFile.mp3"; reg.backgroundFetch.fetch('downloads', [url], { icons: [], title: 'Downloading largeFile.mp3', totalDownloadSize: 1048576 }); }); 01. 02. 03. 04. 05. 06. 07. 08. @philnash

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IN THE SERVICE WORKER self.addEventListener('backgroundfetched', function(event) { if (event.tag === 'downloads') { event.updateUI('largeFile.mp3 downloaded.'); } }); 01. 02. 03. 04. 05. @philnash

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IN THE SERVICE WORKER Other events: • backgroundfetchfail • backgroundfetchabort • backgroundfetchclick @philnash

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DEMO

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BLOG POSTS Background sync: http:/ /bit.ly/bg-sync Background fetch: http:/ /bit.ly/bg-fetch @philnash

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THANKS

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ICON CREDITS • Browser by Kimmi Studio from the Noun Project • Cloud by Kimmi Studio from the Noun Project • Gears by TS Graphics from the Noun Project • Database by Yo! Baba from the Noun Project • wiﬁ by i cons from the Noun Project @philnash

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THANKS! @philnash http:/ /philna.sh [email protected]