San Diego JS - Progressive Web Apps

Slide 1

Slide 1 text

Progressive Web Apps

Slide 2

Slide 2 text

Brian Cardarella CEO of DockYard @bcardarella

Slide 3

Slide 3 text

@dockyard.com https://dockyard.com Design & Software Engineering Consultancy

Slide 4

Slide 4 text

The Mobile Web

Slide 5

Slide 5 text

Who cares?

Slide 6

Slide 6 text

No content

Slide 7

Slide 7 text

No content

Slide 8

Slide 8 text

No content

Slide 9

Slide 9 text

No content

Slide 10

Slide 10 text

How strong is native?

Slide 11

Slide 11 text

No content

Slide 12

Slide 12 text

No content

Slide 13

Slide 13 text

Native Mobile User Acquisition Costs 2012 $1.50 - $2.25 2015 $2.50 - $4.00

Slide 14

Slide 14 text

“It’s not an easy time to build consumer facing mobile companies. It is not an easy time to invest in them either.” — Fred Wilson  Union Square Ventures

Slide 15

Slide 15 text

No content

Slide 16

Slide 16 text

No content

Slide 17

Slide 17 text

No content

Slide 18

Slide 18 text

No content

Slide 19

Slide 19 text

No content

Slide 20

Slide 20 text

No content

Slide 21

Slide 21 text

No content

Slide 22

Slide 22 text

However… The User Experience Sucks because… • no home screen apps • no ofﬂine mode support • they’re slow

Slide 23

Slide 23 text

No content

Slide 24

Slide 24 text

No content

Slide 25

Slide 25 text

Progressive Web Apps (PWA)

Slide 26

Slide 26 text

Progressive Web Apps (PWA) • Instant loading • Fast • Offline / Lie-fi mode • Add to Home Screen • Secure • Push Notifications • Responsive

Slide 27

Slide 27 text

Who cares?

Slide 28

Slide 28 text

No content

Slide 29

Slide 29 text

• Users time on site with Flipkart lite vs. previous mobile experience: 3.5 minutes vs 70 seconds • 3x more time spent on site • 40% higher re-engagement rate • 70% greater conversion rate among those arriving via Add to Homescreen • 3x lower data usage

Slide 30

Slide 30 text

No content

Slide 31

Slide 31 text

No content

Slide 32

Slide 32 text

• 92% less data for initial load, vs. native app • 82% less data to complete ﬁrst transaction, vs. native app • 63% less data for initial load, vs. previous mobile web experience • 84% less data to complete ﬁrst transaction, vs. previous mobile web experience

Slide 33

Slide 33 text

Google Developers Case Studies

Slide 34

Slide 34 text

No content

Slide 35

Slide 35 text

Mobile web traffic 2x native app traffic http://venturebeat.com/2015/09/25/wait-what-mobile-browser-traffic-is-2x-bigger-than-app-traffic-and-growing- faster/

Slide 36

Slide 36 text

No content

Slide 37

Slide 37 text

How?

Slide 38

Slide 38 text

serviceWorker

Slide 39

Slide 39 text

serviceWorker

Slide 40

Slide 40 text

serviceWorker

Slide 41

Slide 41 text

serviceWorker if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/sw.js'); }

Slide 42

Slide 42 text

serviceWorker self.addEventListener('install', function installer (event) { // your installation code });

Slide 43

Slide 43 text

serviceWorker var offlineFundamentals = [ '/', '/offline', '/css/all.css', '/js/all.js' ]; self.addEventListener('install', function installer (event) { event.waitUntil( caches .open('v1::fundamentals') .then(function prefill (cache) { return cache.addAll(offlineFundamentals); }) ); }); https://ponyfoo.com/articles/serviceworker-revolution

Slide 44

Slide 44 text

No content

Slide 45

Slide 45 text

No content

Slide 46

Slide 46 text

fetch replacing XMLHttpRequest function reqListener () { console.log(this.responseText); } var req = new XMLHttpRequest(); req.addEventListener("load", reqListener); req.open("GET", "http://www.example.org/example.txt"); oReq.send();

Slide 47

Slide 47 text

fetch fetch("http://www.example.org/example.txt")

Slide 48

Slide 48 text

fetch var myHeaders = new Headers(); var myInit = { method: 'GET', headers: myHeaders, mode: 'cors', cache: 'default' }; var myRequest = new Request(‘flowers.jpg', myInit); fetch(myRequest, myInit) .then(function(response) { return response.blob(); }); https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch

Slide 49

Slide 49 text

serviceWorker self.addEventListener('fetch', function fetcher (event) { event.respondWith(fetch(event.request)); });

Slide 50

Slide 50 text

serviceWorker self.addEventListener('fetch', function fetcher (event) { var request = event.request; if (request.method !== 'GET') { event.respondWith(fetch(request)); return; } // handle other requests }); https://ponyfoo.com/articles/serviceworker-revolution

Slide 51

Slide 51 text

serviceWorker self.addEventListener('fetch', function fetcher (event) { var request = event.request; if (request.method !== 'GET') { event.respondWith(fetch(request)); return; } event.respondWith(caches .match(request) .then(queriedCache); ); }); https://ponyfoo.com/articles/serviceworker-revolution

Slide 52

Slide 52 text

https://ponyfoo.com/articles/serviceworker-revolution function queriedCache (cached) { var networked = fetch(request) .then(fetchedFromNetwork, unableToResolve) .catch(unableToResolve); return cached || networked; } function fetchedFromNetwork (response) { var clonedResponse = response.clone(); caches.open(version + 'pages').then(function add (cache) { cache.put(request, clonedResponse); }); return response; } function unableToResolve () { return new Response('', { status: 503, statusText: 'Service Unavailable' }); }

Slide 53

Slide 53 text

Can I Use?

Slide 54

Slide 54 text

No content

Slide 55

Slide 55 text

No content

Slide 56

Slide 56 text

Conclusion •PWAs allow you to compete with native • PWAs will make you more money •PAWs will save you money •PWAs are easy to get started •PWAs are very powerful •PWAs can save the mobile web