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PROGRESSIVE WEB APPS in the real world

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Dean Hume @deanohume

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A Progressive Web App uses modern web capabilities to deliver an app-like user experience “

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CORE DRIVERS

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CORE DRIVERS URLS & Links

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CORE DRIVERS URLS & Links System Capabilities

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CORE DRIVERS URLS & Links Accessible System Capabilities

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CORE DRIVERS URLS & Links Accessible System Capabilities Free!

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These apps aren’t packaged and deployed through stores, they’re just websites that took all the right vitamins. Alex Russell “

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Awesome

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NO INSTALL NEEDED Awesome

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NO INSTALL NEEDED NO DOWNLOAD Awesome

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NO INSTALL NEEDED NO DOWNLOAD BUILT ON THE FABRIC OF THE WEB Awesome

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You are already using them

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What does this actually mean for our users?

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What does this actually mean for our users? ★ More engaging

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What does this actually mean for our users? ★ More engaging ★ Faster

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What does this actually mean for our users? ★ More engaging ★ Faster ★ Reliable

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This Talk

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This Talk 1. Understanding Progressive Web Apps

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This Talk 1. Understanding Progressive Web Apps 2. Engage your users

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This Talk 1. Understanding Progressive Web Apps 2. Engage your users 3. Speed up your site

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This Talk 1. Understanding Progressive Web Apps 2. Engage your users 3. Speed up your site 4. Improve reliability

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Understanding progressive web apps 1

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Service workers

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Think of your web apps requests as planes taking off. ServiceWorker is the air traffic controller that routes the requests. Jeff Posnick “

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“The perfect progressive enhancement.”

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Behind the scenes

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With Service Workers

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With Service Workers

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With Service Workers

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With Service Workers

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HTTPS Only

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Free SSL

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Service Workers are the key to unlocking the power

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Support

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The Approach

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The Approach App. Shell Architecture

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The Approach Pick & Choose App. Shell Architecture

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Application Shell Architecture

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bit.ly/app-shell

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Or pick & choose the features you like!

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operasoftware.github.io/pwa-list

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Summary ❖ Service Workers ❖ SSL only ❖ Architecture

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2.Engage your users

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2.1 Look and feel

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2.1 Look and feel 2.2 Push notifications

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2.1 Look and feel 2.3 Add to home screen 2.2 Push notifications

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Look and feel

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Look and feel

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Look and feel bit.ly/color-custom

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Manifest A simple JSON file that allows you to control how your app appears to the user

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{ lang: "en", background_color: "#09adec", name: "Building Great Startup Teams", short_name: "Building Great Startup Teams", display: "standalone", icons: [ { src: "./images/logo-144.png", sizes: "144x144", type: "image/png" } ], start_url: "./index.html", orientation: "portrait" }

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{ lang: "en", background_color: "#09adec", name: "Building Great Startup Teams", short_name: "Building Great Startup Teams", display: "standalone", icons: [ { src: "./images/logo-144.png", sizes: "144x144", type: "image/png" } ], start_url: "./index.html", orientation: "portrait" }

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Customize

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{ lang: "en", background_color: "#09adec", name: "Building Great Startup Teams", short_name: "Building Great Startup Teams", display: "standalone", icons: [ { src: "./images/logo-144.png", sizes: "144x144", type: "image/png" } ], start_url: "./index.html", orientation: "portrait" }

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Manifest bit.ly/manifest-json

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Manifest Generator tomitm.github.io/appmanifest

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Push Notifications

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Three Steps 1. Subscribe User

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Three Steps 1. Subscribe User 2. Save Subscription

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Three Steps 1. Subscribe User 2. Save Subscription 3. Send from Google Cloud

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Subscribe User

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if ('serviceWorker' in navigator) { }

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if ('serviceWorker' in navigator) { navigator.serviceWorker.register('service-worker.js').then(function (registration) { // Registration was successful }).catch(function(err) { // registration failed :( console.log('ServiceWorker registration failed: ', err); }); }

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if ('serviceWorker' in navigator) { navigator.serviceWorker.register('service-worker.js').then(function (registration) { // Registration was successful registration.pushManager.subscribe({userVisibleOnly: true}) .then(function(subscription){ }); }).catch(function(err) { // registration failed :( console.log('ServiceWorker registration failed: ', err); }); }

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Save Subscription

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if ('serviceWorker' in navigator) { navigator.serviceWorker.register('service-worker.js').then(function (registration) { // Registration was successful registration.pushManager.subscribe({userVisibleOnly: true}) .then(function(subscription){ // Send to Server return sendSubscriptionToServer(subscription); }); }).catch(function(err) { // registration failed :( console.log('ServiceWorker registration failed: ', err); }); }

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Send from Google Cloud

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Manifest

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{ "name": "Push Demo", "short_name": "Push Demo", "icons": [{ "src": "icon.png", "sizes": "192x192", "type": "image/png" }], "start_url": "/index.html", "display": "standalone", "gcm_sender_id": "57874135625436178", "gcm_user_visible_only": true, "permissions": [ "gcm" ]} Manifest

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bit.ly/push-notifications-google bit.ly/push-notifications-dean Further reading

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https://deanhume.github.io/typography

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Add to home screen

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Add to home screen

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Add to home screen 1. You need a manifest.json file

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Add to home screen 1. You need a manifest.json file 2. Your manifest file needs a start URL

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Add to home screen 1. You need a manifest.json file 2. Your manifest file needs a start URL 3. You need a 144x144 PNG icon

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Add to home screen 1. You need a manifest.json file 2. Your manifest file needs a start URL 3. You need a 144x144 PNG icon 4. Your site is using a Service Worker running over HTTPS

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Add to home screen 1. You need a manifest.json file 2. Your manifest file needs a start URL 3. You need a 144x144 PNG icon 4. Your site is using a Service Worker running over HTTPS 5. The user has visited your site at least twice, with at least five minutes between visits.

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{ lang: "en", background_color: "#09adec", name: "Building Great Startup Teams", short_name: "Building Great Startup Teams", display: "standalone", icons: [ { src: "./images/logo-144.png", sizes: "144x144", type: "image/png" } ], start_url: "./index.html", orientation: "portrait" }

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Look and feel Add to home screen Push notifications Sum m ary

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3.Speed up your site

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3.1 Caching

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3.1 Caching 3.2 Save-Data Header

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3.1 Caching 3.3 Background Sync 3.2 Save-Data Header

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Caching

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With Service Workers

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With Service Workers

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var cacheVersion = 1; var currentCache = { assetCache: 'cache' + cacheVersion }; Caching

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var cacheVersion = 1; var currentCache = { assetCache: 'cache' + cacheVersion }; this.addEventListener('install', event => { event.waitUntil(caches.open(currentCache.assetCache) .then(function(cache) { }) ); }); Caching

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var cacheVersion = 1; var currentCache = { assetCache: 'cache' + cacheVersion }; this.addEventListener('install', event => { event.waitUntil(caches.open(currentCache.assetCache) .then(function(cache) { return cache.addAll(['result.min.css', './js/material.min.js']); }) ); }); Caching

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var cacheVersion = 1; var currentCache = { assetCache: 'cache' + cacheVersion }; this.addEventListener('install', event => { event.waitUntil(caches.open(currentCache.assetCache) .then(function(cache) { return cache.addAll(['result.min.css', './js/material.min.js']); }) ); }); this.addEventListener('fetch', event => { event.respondWith(caches.match(event.request) .then(function (response) { return response || fetch(event.request); }) ); }); Caching

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github.com/GoogleChrome/sw-toolbox bit.ly/sw-toolbox

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Save-Data Header

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Using Service Workers

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Using Service Workers

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this.addEventListener('fetch', event => { if(event.request.headers.get('save-data')){ if (/\.jpg$|.gif$|.png$/.test(event.request.url)) { // We can do something event.respondWith( fetch(‘low-quality-’ + event.request.url, { mode: 'no-cors' }) } } });

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this.addEventListener('fetch', event => { if(event.request.headers.get('save-data')){ if (/\.jpg$|.gif$|.png$/.test(event.request.url)) { // We can do something event.respondWith( fetch(‘low-quality-’ + event.request.url, { mode: 'no-cors' }) } } });

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this.addEventListener('fetch', event => { if(event.request.headers.get('save-data')){ if (/\.jpg$|.gif$|.png$/.test(event.request.url)) { // We can do something event.respondWith( fetch(‘low-quality-’ + event.request.url, { mode: 'no-cors' }) } } });

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this.addEventListener('fetch', event => { if(event.request.headers.get('save-data')){ if (/\.jpg$|.gif$|.png$/.test(event.request.url)) { // We can do something event.respondWith( fetch(‘low-quality-’ + event.request.url, { mode: 'no-cors' }) } } });

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buildingstartupteams.com

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buildingstartupteams.com

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Saved 900 KB!

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Background sync

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Using Service Workers

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Using Service Workers

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With Service Workers

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Try later….

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// Request a one-off sync: navigator.serviceWorker.ready.then( function(swRegistration) { return swRegistration.sync.register('myFirstSync'); });

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// Request a one-off sync: navigator.serviceWorker.ready.then( function(swRegistration) { return swRegistration.sync.register('myFirstSync'); }); self.addEventListener('sync', function(event) { if (event.tag == 'myFirstSync') { event.waitUntil(expensiveOperation()); } });

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// Request a one-off sync: navigator.serviceWorker.ready.then( function(swRegistration) { return swRegistration.sync.register('myFirstSync'); }); self.addEventListener('sync', function(event) { if (event.tag == 'myFirstSync') { event.waitUntil(expensiveOperation()); } });

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Background sync bit.ly/background-sync

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Caching Background Sync Save-Data Header Sum m ary

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4.Reliable

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4.1 Offline Browsing 4.2 3rd Party Scripts

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Offline

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With Service Workers

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this.addEventListener('fetch', event => { };

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this.addEventListener('fetch', event => { // Check if the user navigated if (event.request.method === 'GET' && event.request.headers. get('accept').includes('text/html')) { // Respond appropriately } };

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this.addEventListener('fetch', event => { // Check if the user navigated if (event.request.method === 'GET' && event.request.headers. get('accept').includes('text/html')) { // Respond appropriately event.respondWith( fetch(event.request.url).catch(error => { // Return the offline page return caches.match('the-offline-page'); })); } };

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Offline Applications bit.ly/offline-apps bit.ly/offline-page

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3rd Party Scripts

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Server Fails

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Using Service Workers

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Using Service Workers

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With Service Workers

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function timeout(delay) { return new Promise(function(resolve, reject) { setTimeout(function(){ resolve(new Response('', { status: 408, statusText: 'Request timed out.' })); }, delay); }); }

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function timeout(delay) { return new Promise(function(resolve, reject) { setTimeout(function(){ resolve(new Response('', { status: 408, statusText: 'Request timed out.' })); }, delay); }); } self.addEventListener('fetch', event => { });

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function timeout(delay) { return new Promise(function(resolve, reject) { setTimeout(function(){ resolve(new Response('', { status: 408, statusText: 'Request timed out.' })); }, delay); }); } self.addEventListener('fetch', event => { event.respondWith(Promise.race([timeout(6000), fetch (event.request.url)])); });

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bit.ly/sw-timeout

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Summary

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Summary 1. Understanding Progressive Web Apps 2. Engage your users 3. Speed up your site 4. Improve reliability

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Performance is a feature

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Further reading ❖ Shell Architecture - bit.ly/instant-shell ❖ Getting Started - bit.ly/starting-pwas ❖ Service Worker - bit.ly/pwa-swers ❖ Code Labs -bit.ly/code-labs-pwa ❖ Recipes ➢ bit.ly/mozilla-service-workers ➢ bit.ly/chrome-service-workers

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What’s still to come?

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What’s still to come? Web Bluetooth webbluetoothcg.github.io/web-bluetooth Streams API jakearchibald.com/2016/streams-ftw Web NFC w3c.github.io/web-nfc Geofencing w3c.github.io/geofencing-api

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Thank you! @ deanohum e