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Getting started with Progressive Web Apps

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Photo goes here Vitor Alencar Desenvolvedor com foco em tecnologias novas e escaláveis, graduando em sistemas de informação,Co fundador do DEV I/O FOR , Google developer groups organizer e Organizado do Front-in Fortaleza @vitormalencar GURU-CE

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flickr.com/photos/monado/4405843023

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This amazing software

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vs. Source: comScore Mobile Metrix, U.S., Age 18+, June 2015 13% 87% Mobile web Apps

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80% OF TIME SPENT IS IN USERS’ TOP 3 APPS Source: comScore Mobile Metrix, U.S., Age 18+, June 2015

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Capability Reach

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ZERO NUMBER OF APPS AVERAGE USER INSTALLS PER MONTH Source: comScore Mobile Metrix, U.S., Age 18+, June 2015

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Capability Reach

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Capability Reach

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are a new level of caring about the quality of your user experience Progressive Web Apps

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Reliable User experiences need to be...

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Lie-Fi

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Reliability means never showing the offline dinosaur

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Reliable Fast User experiences need to be...

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of users abandon sites that take longer than 3 seconds to load 53%

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Reliable Fast Engaging User experiences need to be...

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Full screen, theming, orientation, etc. Push notifications Immersive Notifications Engaging Auto-adding to Home Screen Home Screen

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` Web Push Notifications

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` No surprises!

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https://wapo.com/pw a https://wapo.com/pw a

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` 80ms article page load time in the Progressive Web App Poynter article

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Reliable Fast Engaging Progressive Web Apps are…

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How do I get started?

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Stay Secure

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` HTTPS: Secure connection between site and users

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Trust Is this site who they claim to be? Data integrity Has anyone tampered with this page? User privacy Can anyone see my browsing behavior? Keeping Users Safe

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Chrome DevTools Security Panel

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Search Ranking Guidance bit.ly/https-migration

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Use a Service Worker

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WHAT ??

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Web server

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Service worker Client side proxy (written in JavaScript) Cache Web server

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Service Worker Life Cycle • Adds app-like lifecycle to a page • Wakes up only when the OS says • Only responds to system events Activated Error Idle Active Terminated Install Register

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Service Worker Life Cycle • Adds app-like lifecycle to a page • Wakes up only when the OS says • Only responds to system events Activated Error Idle Active Terminated Install Register

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Service Worker Life Cycle • Adds app-like lifecycle to a page • Wakes up only when the OS says • Only responds to system events Activated Error Idle Active Terminated Install Register

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Service Worker Life Cycle • Adds app-like lifecycle to a page • Wakes up only when the OS says • Only responds to system events Activated Error Idle Active Terminated Install Register

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is for the SECOND load. Service Worker

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Life Cycle of a Service Worker Installing the Service Worker 1st Page Load install idle

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Life Cycle of a Service Worker Installing the Service Worker 2nd Page Load activated check for update

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Life Cycle of a Service Worker Installing the Service Worker Close Page idle terminated activated

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Life Cycle of a Service Worker Updating a Service Worker Load Page with Service Worker activated check for update

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Life Cycle of a Service Worker Updating a Service Worker Load Page with Service Worker activated check for update install idle

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Life Cycle of a Service Worker Updating a Service Worker Load Page with Service Worker activated check for update install idle

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Caching strategies You are in control of the network

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Cache, Falling Back to Network

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Network, Falling Back to Cache

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Cache then Network

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Generic Fallback

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Cache and Network Race

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Caching strategies galore!

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Engage Your Users

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Add to Home Screen

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Add To Home Screen Was Broken

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Add To Home Screen Was Broken Required user interaction Buried deep in menus

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Add To Home Screen Was Broken Required user interaction Buried deep in menus Where would it start? Dependent on bookmark

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Add To Home Screen Was Broken Required user interaction Buried deep in menus Where would it start? Dependent on bookmark Would it work offline? Users didn't expect offline

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{ "name": "The Washington Post", "short_name": "Wash Post", "icons": [{ "src": "icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#000000", "theme_color": "#000000" }

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manifest.json { "name": "The Washington Post", "short_name": "Wash Post", "icons": [{ "src": "icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#000000", "theme_color": "#000000" }

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manifest.json { "name": "The Washington Post", "short_name": "Wash Post", "icons": [{ "src": "icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#000000", "theme_color": "#000000" }

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manifest.json { "name": "The Washington Post", "short_name": "Wash Post", "icons": [{ "src": "icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#000000", "theme_color": "#000000" }

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manifest.json { "name": "The Washington Post", "short_name": "Wash Post", "icons": [{ "src": "icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#000000", "theme_color": "#000000" }

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` Good, but what about prompt to install?

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A Promise to the User Consistent Experience Works Offline The User is Engaged

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` Web Push Notifications

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` Web Push Notifications The browser doesn’t need to be open!

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`

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` 38% open rate 9x more conversions on previously abandoned carts

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Anatomy of a notification I feel I need it and it matters right now. when: it's timely

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Anatomy of a notification I feel I need it and it matters right now. when: it's timely

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Anatomy of a notification when: it's timely what: it's precise It has specific info that’s good to know or act upon.

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Anatomy of a notification when: it's timely what: it's precise what & who: it's relevant It’s from people or sources that matter to me, which makes it personal.

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Built on Service Workers /* ServiceWorker.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 /content.json HTTP/1.1 HOST example.com GET /content.json HTTP/1.1 HOST example.com GET /app.html HTTP/1.1 HOST example.com

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Built on Service Workers /* ServiceWorker.js */ onpush = function(event) { var data = event.data.json(); var t = data.title; var opt = { body: data.body, icon: data.icon, tag: data.tag }; self.registration .showNotification(t, opt); }; End Point example.co m

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Check out the Push code lab

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Stay Secure

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Use a Service Worker

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Engage Your Users

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` 2x more page views 74% increase in time spent

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` 2x more page views 74% increase in time spent 82% more conversions on iOS

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are progressive. Progressive Web Apps

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are a new level of caring about the quality of your user experience Progressive Web Apps

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to Establish a Baseline goo.gl/S07woZ Use Lighthouse

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` 98% 1430.2ms First meaningful paint 94% 2069.4ms Time To Interactive 96% 1591 Perceptual Speed Index vitormalencar.com

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Show me the metrics

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Show me the metrics

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` 100% 630.9ms First meaningful paint 99% 1210.8ms Time To Interactive 99% 1005 Perceptual Speed Index vitormalencar.com

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Show me the metrics

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…but not a destination! Lighthouse: Fantastic Tool

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http://bit.ly/1ksSnNS

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http://bit.ly/2mbUaPN

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http://bit.ly/2mpN0U2

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Ready-to-rock Preact starter project http://bit.ly/2lKsK2g

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https://pwa-directory.appspot.com/

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+vitormalencar @vitormalencar