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Proprietary + Confidential Progressive Web Apps Mobile has natively come to the Web Surma @DasSurma

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Bach's home page h1 { color: red }

Bach's home page

Johann Sebastian Bach was a prolific composer.

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Ajax was born to run desktop apps on the Web

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How did the Web beat native applications on the desktop?

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Distribution Is The Hardest Problem In Software flickr.com/photos/blakespot/

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What if the Web evolved those capabilities, just as it did with Ajax?

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Got Service Workers? and HTTPS?

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Service Workers Are Network Progressive Enhancement A Programmable Network Proxy under your control.

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Service Workers are to Progressive Web Apps as XMLHttpRequest was to Ajax The foundational capability that was a tipping point for innovation

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What's Missing? 1. Homescreen Access 2. Push Notifications 3. Offline

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1. Homescreen Access Less typing, more tapping.

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airhorner.com Paul Kinlan @paulkinlan

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2007: iPhone launch

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Installable // Later on more icon sizes.... // Nice splash screen ...

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Launch like an app (no address bar)

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Offline available db = openDatabase("Todo", "1", "Todo", 5 * 1024 * 1024); db.transaction(function(tx) { tx.executeSql("SELECT * FROM CARS)"); }); App Cache Web SQL

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem We have everything we need?

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2012: Early Chrome on Android

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Standardised Add to homescreen

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Installable web apps in 2 simple steps { "name": "The Airhorner", "short_name": "Airhorner", "icons": [], "start_url": "index.html", "display": "standalone", "theme_color": "", "background_color": "" } 1. Create a manifest (json) 2. Link it to your page

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Flow 1. User clicks “Add to home screen” a. Manifest is downloaded 2. Confirmation prompt shown 3. You are on the homescreen

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Flow 1. User clicks “Add to home screen” a. Manifest is downloaded 2. Confirmation prompt shown 3. You are on the homescreen

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Flow 1. User clicks “Add to home screen” a. Manifest is downloaded 2. Confirmation prompt shown 3. You are on the homescreen

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Flow { "name": "The Air Horner", "short_name": "Air Horner", "icons": [ { "src": "images/Airhorner_192.png", "type": "image/png", "sizes": "192x192" } ], "start_url": "index.html", "display": "standalone", "theme_color": "#2196F3", "background_color": "#2196F3" }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Homescreen { "name": "The Air Horner", "short_name": "Air Horner", "icons": [ { "src": "images/Airhorner_192.png", "type": "image/png", "sizes": "192x192" } ], "start_url": "index.html", "display": "standalone", "theme_color": "#2196F3", "background_color": "#2196F3" }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem App switcher { "name": "The Air Horner", "short_name": "Air Horner", "icons": [ { "src": "images/Airhorner_192.png", "type": "image/png", "sizes": "192x192" } ], "start_url": "index.html", "display": "standalone", "theme_color": "#2196F3", "background_color": "#2196F3" }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Splash screen: part 1 { "name": "The Air Horner", "short_name": "Air Horner", "icons": [ { "src": "images/Airhorner_192.png", "type": "image/png", "sizes": "192x192" } ], "start_url": "index.html", "display": "standalone", "theme_color": "#2196F3", "background_color": "#2196F3" }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem What to Launch { "name": "The Air Horner", "short_name": "Air Horner", "icons": [ { "src": "images/Airhorner_192.png", "type": "image/png", "sizes": "192x192" } ], "start_url": "index.html?homescreen", // stats.... "display": "standalone", "theme_color": "#2196F3", "background_color": "#2196F3" }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Splash screen: part 2 { "name": "The Air Horner", "short_name": "Air Horner", "icons": [ { "src": "images/Airhorner_192.png", "type": "image/png", "sizes": "192x192" } ], "start_url": "index.html", "display": "standalone", "theme_color": "#2196F3", "background_color": "#2196F3" }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem How to launch: standalone { "name": "The Air Horner", "short_name": "Air Horner", "icons": [ { "src": "images/Airhorner_192.png", "type": "image/png", "sizes": "192x192" } ], "start_url": "index.html", "display": "standalone", "theme_color": "#2196F3", "background_color": "#2196F3" }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem How to launch: window { "name": "The Air Horner", "short_name": "Air Horner", "icons": [ { "src": "images/Airhorner_192.png", "type": "image/png", "sizes": "192x192" } ], "start_url": "index.html", "display": "standalone", // window "theme_color": "#2196F3", "background_color": "#2196F3" }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem Tailor user interface if (window.matchMedia('(display-mode: standalone)').matches) { console.log("Thank you for installing our app!"); } @media all and (display-mode: standalone) { body { background-color: yellow; } }

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It’s great, but... Native apps can prompt the user to install... Proprietary + Confidential

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Prompt to Install

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Prompting the user is a powerful feature Only sites the browser thinks the user will want to re-engage with will get the prompt

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Offer an offline experience Have a manifest User is engaged Follow Jake’s guidance. ● Service Worker ● HTTPS Define what to launch and how to launch it. 2 “navigations” within at least 5 minutes* * this will change

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Why so strict?

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No offline-o-saurus. When you are on the user’s Home screen, you should always be available

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Why manifest? Don’t launch into a leaf page You need to control the launch experience

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Why engaged? Don’t spam the users

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Can I control it?

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Yes onbeforeinstallprompt

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Suppress prompt window.addEventListener("beforeinstallprompt", (e) => e.preventDefault() );

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Defer to a later time var deferredEvent; window.addEventListener("beforeinstallprompt", (e) => { e.preventDefault(); deferredEvent = e; // show install button } ); button.addEventListener("click", (e) => deferredEvent.prompt(); );

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Defer to a later time var deferredEvent; window.addEventListener("beforeinstallprompt", (e) => { e.preventDefault(); deferredEvent = e; // show install button } ); button.addEventListener("click", (e) => deferredEvent.prompt(); );

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Understand the user’s choice var deferredEvent; window.addEventListener("beforeinstallprompt", (e) => e.prompt().then((r) => r.userChoice) .then((c) => { if(c.choice == "installed") { // Success } else { // The user cancelled } }) );

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2. Push Notifications How can we re-engage users at the right time?

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26% increase in average spend per visit by members arriving via a push notification 72% increase in time spent for users visiting via a push notification +50% repeat visits within 3 months

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Proprietary + Confidential

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Add Project ID to the Manifest.json { "short_name": "Air Horner", "name": "Air Horner", "start_url": "/", "display": "standalone", "icons": [{ "src": "icons/icon-192.png", "sizes": "192x192", "type": "image/png" }], "gcm_sender_id": "123456789012345" }

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Add Project ID to the Manifest.json { "short_name": "Air Horner", "name": "Air Horner", "start_url": "/", "display": "standalone", "icons": [{ "src": "icons/icon-192.png", "sizes": "192x192", "type": "image/png" }], "gcm_sender_id": "123456789012345" }

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Setup work for Firefox [This space intentionally blank]

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Proprietary + Confidential On the Client

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Checking for subscriptions if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/service-worker.js') .then(function(reg) { reg.pushManager.getSubscription() .then(function(sub) { console.log('Subscription Info', sub); }); }); } else { console.log('Subscription Info', 'Not Supported'); }

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Checking for subscriptions if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/service-worker.js') .then(function(reg) { reg.pushManager.getSubscription() .then(function(sub) { console.log('Subscription Info', sub); }); }); } else { console.log('Subscription Info', 'Not Supported'); }

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Checking for subscriptions if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/service-worker.js') .then(function(reg) { reg.pushManager.getSubscription() .then(function(sub) { console.log('Subscription Info', sub); }); }); } else { console.log('Subscription Info', 'Not Supported'); }

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Requesting permission and subscribing function subscribe() { navigator.serviceWorker.getRegistration().then(function(reg) { reg.pushManager.subscribe({userVisibleOnly: true}) .then(function(sub) { console.log('Update Server with End Point', sub); }).catch(function(error) { console.log('Unable to subscribe user', error); }); }); }

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Requesting permission and subscribing function subscribe() { navigator.serviceWorker.getRegistration().then(function(reg) { reg.pushManager.subscribe({userVisibleOnly: true}) .then(function(sub) { console.log('Update Server with End Point', sub); }).catch(function(error) { console.log('Unable to subscribe user', error); }); }); }

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Requesting permission and subscribing function subscribe() { navigator.serviceWorker.getRegistration().then(function(reg) { reg.pushManager.subscribe({userVisibleOnly: true}) .then(function(sub) { console.log('Update Server with End Point', sub); }).catch(function(error) { console.log('Unable to subscribe user', error); }); }); }

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Requesting permission and subscribing function subscribe() { navigator.serviceWorker.getRegistration().then(function(reg) { reg.pushManager.subscribe({userVisibleOnly: true}) .then(function(sub) { console.log('Update Server with End Point', sub); }).catch(function(error) { console.log('Unable to subscribe user', error); }); }); }

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem or check out Propel https://github.com/GoogleChrome/propel

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Proprietary + Confidential Handling the message

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Handle incoming messages self.addEventListener('push', function(event) { event.waitUntil( function() { self.registration.showNotification('Title', { body: 'I\'m the message body', icon: 'images/icons.png', tag: 'tag', }); }); });

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Handle incoming messages self.addEventListener('push', function(event) { event.waitUntil( function() { self.registration.showNotification('Title', { body: 'I\'m the message body', icon: 'images/icons.png', tag: 'tag', }); }); });

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3. Offline That Works™ It isn't an app if it doesn't start when you tap.

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example.com GET /app.html HTTP/1.1 HOST example.com ... HTTP/1.1 200 OK Date: Thu, 19 Feb 2015 05:21:56 GMT ...

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example.com // sw.js onfetch = function(e) { if(e.request.url == "app.html") { e.respondWith( caches.match(e.request) ); } if(e.request.url == "content.json") { // go to the network for updates, // meanwhile, use cached content fetch(...).then(function(r) { r.asJSON().then(function(json) { e.client.postMessage(json); }); }); } }; GET /app.html HTTP/1.1 HOST example.com ... GET /content.json HTTP/1.1 HOST example.com ... GET /content.json HTTP/1.1 HOST example.com ... HTTP/1.1 200 OK Date: Thu, 19 Feb 2015... ...

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Source: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis non erat sem or check out sw-toolbox & sw-precache https://github.com/GoogleChrome/sw-toolbox https://github.com/GoogleChrome/sw-precache

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Confidential & Proprietary ● Reliable: Fast loading, offline and on flaky networks ● Fast: Smooth animation, scrolling and nav ● Engaging and integrated ○ On the home screen, no URL bar, icons, splash ○ Re-engaging with push notifications ● Consistent experience across browsers (still in progress, though) The Progressive Web App Experience

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Kill Your Dinosaur!

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Proprietary + Confidential Fin Surma @DasSurma