building an appier web - velocity amsterdam 2016
TRANSCRIPT
Building an Appier Web @AndyDavies NCC Group Nov 2016
https://www.flickr.com/photos/alesimages/4215559895
We’re spending more and more time in apps…
© comScore, Inc. Proprietary. 5
Digital media usage time is exploding right now, and it’s predominantly being driven by mobile apps.
476,553 480,967 550,522
409,847 621,410
778,954 77,081
97,440
118,299
0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
Jun-2013 Jun-2014 Jun-2015
Tota
l Min
utes
(MM
)
Desktop Mobile App Mobile Browser Over the past two years, total digital media usage has grown 49% with mobile apps having grown 90% and contributing to 77% of the total increase in time spent. Mobile browser is also seeing very strong growth at 53% and even desktop is still rising.
Growth in Digital Media Time Spent Source: comScore Media Metrix Multi-Platform & Mobile Metrix, U.S., Total Audience
+53% vs. 2013
+90% vs. 2013
+16% vs. 2013
© comScore, Inc. Proprietary. 37
29%
15%
11% 6%
6%
4% 3% 3%
23% Social Networking
Radio
Games
Multimedia
Instant Messengers
Music
Retail
News/Information
All Others
Social Networking, Radio and Games contribute more than half of total time spent on mobile apps. The strength of the top categories highlights that mobile devices are more heavily used for entertainment and communication than their desktop counterparts.
Share of Mobile App Time Spent Source: comScore Media Metrix MP and Mobile Metrix, U.S., Total Audience, June 2015
Social media and entertainment account for the six top app categories and drive two-thirds of total time spent on apps. But our usage can be very specific
https://www.flickr.com/photos/michigancommunities/4614847059
Installing apps consumes storage and data
© comScore, Inc. Proprietary. 13
And mobile audience growth is being driven more by mobile web properties, which are actually bigger and growing faster than apps.
A comparison of the Top 1000 Apps vs. the Top 1000 Mobile Web Properties shows a surprising result. Not only do mobile web properties have audiences that are more than 2.5x the size, but these audiences are also growing twice as fast.
Average Monthly Audience: Top 1000 Mobile Apps vs. Top 1000 Mobile Web Properties Source: comScore Mobile Metrix, U.S., Age 18+
-
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
Jun-2014 Sep-2014 Dec-2014 Mar-2015 Jun-2015
Uni
que
Vis
itors
(000
)
Apps Mobile Web +42% y/y
+21% y/y
The web has great reach…
We can already add pages to our home screen
Supported by most major mobile operating systems and browsers(Bookmarks page rather than site)
Can specify the icon etc. via meta tags
<link rel="apple-touch-icon" href="icons/logo/ncc-logo-120x120-ios.png"> <link rel="apple-touch-icon-precomposed" href="icons/logo/ncc-logo-120x120-ios.png"> <link rel="apple-touch-startup-image" href="/images/startup.png">
<meta name="apple-mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-status-bar-style" content="black">
(Minimal iOS set, ideally need more icon and splash screen sizesand other mobile browsers prefer different meta data)
W3C App Manifest brings it all together{ "lang": "en", "dir": "ltr", "name": "Monitoring", "description": "Performance and Availability Monitoring by NCC Group", "short_name": "Monitoring", "icons": [ { "src": "icons/logo/ncc-logo-144x144-white.png", "sizes": "144x144", "type": "image/png" },
. . . ],
"scope": "/pwa", "start_url": "/pwa/index.html", "display": "standalone", "orientation": "portrait", "theme_color": "#c41230", "background_color": "#fff", }
https://www.w3.org/TR/appmanifest/
Homescreen Icon{ "lang": "en", "dir": "ltr", "name": "Monitoring", "description": "Performance and Availability Monitoring by NCC Group", "short_name": "Monitoring", "icons": [ { "src": "icons/logo/ncc-logo-144x144-white.png", "sizes": "144x144", "type": "image/png" },
. . . ],
"scope": "/pwa", "start_url": "/pwa/index.html", "display": "standalone", "orientation": "portrait", "theme_color": "#c41230", "background_color": "#fff", }
URL of the page that’s launched{ "lang": "en", "dir": "ltr", "name": "Monitoring", "description": "Performance and Availability Monitoring by NCC Group", "short_name": "Monitoring", "icons": [ { "src": "icons/logo/ncc-logo-144x144-white.png", "sizes": "144x144", "type": "image/png" },
. . . ],
"scope": "/pwa", "start_url": "/pwa/index.html", "display": "standalone", "orientation": "portrait", "theme_color": "#c41230", "background_color": "#fff", }
Splash screen{ "lang": "en", "dir": "ltr", "name": "Monitoring", "description": "Performance and Availability Monitoring by NCC Group", "short_name": "Monitoring", "icons": [ { "src": "icons/logo/ncc-logo-144x144-white.png", "sizes": "144x144", "type": "image/png" },
. . . ],
"scope": "/pwa", "start_url": "/pwa/index.html", "display": "standalone", "orientation": "portrait", "theme_color": "#c41230", "background_color": "#fff", }
Orientation and presence of browser controls{ "lang": "en", "dir": "ltr", "name": "Monitoring", "description": "Performance and Availability Monitoring by NCC Group", "short_name": "Monitoring", "icons": [ { "src": "icons/logo/ncc-logo-144x144-white.png", "sizes": "144x144", "type": "image/png" },
. . . ],
"scope": "/pwa", "start_url": "/pwa/index.html", "display": "standalone", "orientation": "portrait", "theme_color": "#c41230", "background_color": "#fff", }
Can listen for install event and track in analytics
window.addEventListener('beforeinstallprompt', function(e) {
e.userChoice.then(function(choiceResult) {
console.log(choiceResult.outcome);
if (choiceResult.outcome == 'dismissed') { // Track not installed } else { // Track installation } }); });
(Chrome supports this but it’s not in AppManifest standard)
Can listen for install event and track in analytics
window.addEventListener('appinstalled', function(e) { // Track installation });
(AppManifest standard proposes this)
<script>
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('serviceworker.js', { scope: '/' }).then(function(registration) {
// Anything else you want to do with registration // e.g. subscribe to push messages
}).catch(function(err) { console.log('Can\'t register service worker: ', err); }); }
</script>
Register a Service Worker
Option to install via Link may be coming
<link rel="serviceworker" scope="/" href=“/serviceworker.js">
or
Link </serviceworker.js>; rel=serviceworker scope=/
(Origin trial in Chrome, under consideration in Firefox)
Service Worker Skeleton
self.addEventListener('install', function(event) { self.skipWaiting();
});
self.addEventListener('activate', function(event) {
});
self.addEventListener('fetch', function(event) {
});
Going offline - caching assets on startupvar cacheVersion = "v1";
var cacheResources = [ "/pwa/index.html", "/pwa/icons/logo/ncc-logo.svg", "/pwa/icons/ui/sprite.svg" // etc ];
self.addEventListener('install', function(event) { self.skipWaiting(); event.waitUntil( caches.open(cacheVersion).then(function(cache) { return cache.addAll(cacheResources); }) ); });
Going offline - retrieving from cache on fetch
self.addEventListener('fetch', function(event) { event.respondWith( caches.match(event.request).then(function(response) { return response || fetch(event.request); }) ); });
Try the cache first and go to the network if there’s no match
Going offline - cleanup previous resources
self.addEventListener('activate', function(event) {
// Remove outdated caches, migrate data etc,
});
Caching as a fallback for network
• Make a request• Succeeds - cache response and return it• Fails - check cache and return cached response
• Network request fails and not in cache ¯\_( )_/¯
(OK so you probably want to manage the users experience in the last case)
Caching patterns depend on use case, some very helpful resources
Mozilla https://serviceworke.rs/
Jake Archibald https://jakearchibald.com/2014/offline-cookbook/
ServiceWork Toolbox https://github.com/GoogleChrome/sw-toolbox
We’re getting better access to native features
• Camera• Notifications• Location• Geofencing
• Alarms• Vibration• Sharing• Battery• and more…
(On some platforms)
You can deploy them today
• 3x more time spent on site• 40% higher re-engagement rate• 70% greater conversion rate for
those arriving via Homescreen• 3x lower data usage
These apps aren’t packaged and deployed through stores, they’re just websites that took all the right vitamins
https://infrequently.org/2015/06/progressive-apps-escaping-tabs-without-losing-our-soul/
Alex Russell, Google
I still have questions…
• What might not be suitable as a progressive web app?• Can we build PWAs that are as fast and frictionless as native?• How can we sell our apps, will we need app stores?• How do we avoid an uncanny UI valley?• What happens to storage when every site is a PWA?
http://www.flickr.com/photos/auntiep/5024494612
@AndyDavies
http://slideshare.net/andydavies