Progressive Web Apps – Mobile has natively come to the Web

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

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <HTML> <HEAD> <TITLE>Bach's home
page</TITLE> <STYLE type="text/css"> h1 { color: red } </STYLE> </HEAD> <BODY> <H1>Bach's home page</H1> <P>Johann Sebastian Bach was a prolific composer. </BODY> </HTML>

Ajax was born to run desktop apps on the Web

How did the Web beat native applications on the desktop?

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

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

Got Service Workers? and HTTPS?

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

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

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

1. Homescreen Access Less typing, more tapping.

airhorner.com Paul Kinlan @paulkinlan

2007: iPhone launch

Installable <link rel="apple-touch-icon" href="touch-icon-iphone.png"> // Later on more icon sizes....
<link rel="apple-touch-icon" sizes="76x76" href="touch-icon-ipad.png"> <link rel="apple-touch-icon" sizes="120x120" href="touch-icon-iphone-retina.png"> <link rel="apple-touch-icon" sizes="152x152" href="touch-icon-ipad-retina.png"> // Nice splash screen ... <link rel="apple-touch-startup-image" href="/startup.png">

Launch like an app (no address bar) <meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">

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

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

2012: Early Chrome on Android

Standardised Add to homescreen

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) <link rel="manifest" href="/manifest.json"> 2. Link it to your page

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

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" }

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" }

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" }

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" }

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" }

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" }

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" }

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" }

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; } }

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

Prompt to Install

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

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

Why so strict?

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

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

Why engaged? Don’t spam the users

Can I control it?

Yes onbeforeinstallprompt

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

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

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 } }) );

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

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

Proprietary + Confidential

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" }

Setup work for Firefox [This space intentionally blank]

Proprietary + Confidential On the Client

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'); }

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); }); }); }

non erat sem or check out Propel https://github.com/GoogleChrome/propel

Proprietary + Confidential Handling the message

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', }); }); });

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

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 ...

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... ...

non erat sem or check out sw-toolbox & sw-precache https://github.com/GoogleChrome/sw-toolbox https://github.com/GoogleChrome/sw-precache

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

Kill Your Dinosaur!

Proprietary + Confidential Fin Surma @DasSurma

Progressive Web Apps – Mobile has natively come...

Progressive Web Apps – Mobile has natively come to the Web

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