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PWA Challenges — Toronto Web Perf Meetup

PWA Challenges — Toronto Web Perf Meetup

Jason Grigsby

November 28, 2018

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  1. Cool. I’ve been wanting to play with service workers… Maybe

    we can use Vue.js here as well… I wonder if this can be used as excuse to switch to node js…
  2. Ola Cabs • 68% increase in mobile traffic • Tier

    2 cities conversion rate same as native app. Tier 3 cities, conversion rate is 30% higher with PWA. • PWA is 200KB which 300x smaller than Android and 500x than iOS. • 20% of users who book in the PWA had previously uninstalled app. Source: Google, http://bit.ly/2q9D4EA
  3. Original Definition by Frances Berriman and Alex Russell Responsive 

    Fit any form factor. RWD FTW! Connectivity Independent
 Offline features thanks to service workers. App-like interactions
 App shell for apps navigation. Fresh
 Up-to-date thanks to service workers. Safe
 Served on HTTPS. Discoverable
 Manifest files identify them as apps. Re-engageable
 Push notifications bring people back to apps. Installable
 Can be installed to the home screen w/o app stores. Linkable
 Still part of the web—URLs still work. Progressive
 Use progressive enhancement for better experience.
  4. PWA is a website that has been enhanced with: {manifest}

    https service worker Credit to Jeremy Keith for explicitly declaring a technical definition: https://adactio.com/journal/13098
  5. Side note: Measuring the impact of your own service worker

    using synthetic data is a pain (right now?).
  6. PWA is a website that has been enhanced with: {manifest}

    https service worker But PWAs can be much more…
  7. The name isn’t for you and worrying about it is

    distraction from just building things that work better for everyone. The name is for your boss, for your investor, for your marketeer. —Frances Berriman, Naming Progressive Web Apps
  8. If so, you would probably benefit from a PWA. Does

    your organization have a website?
  9. Does your organization make money on your website via e-commerce,

    advertising, or some other method? If so, you definitely need a progressive web app.
  10. Your website is often a customer’s first interaction with your

 A better web experience will likely mean more revenue and more native app installs.
  11. AliExpress • 104% for new users across all browsers in

    conversion • 82% increase in iOS conversion Source: Google, http://bit.ly/2fq2ckc
  12. Wego • 50% increase in iOS conversion • 35% increase

    in average iOS session duration Source: Google, https://bit.ly/2uOsoNM
  13. 1. Making it feel like an app 2. Installation and

    Discovery 3. Offline mode 4. Push Notifications 5. Beyond PWAs
  14. 1. Making it feel like an app 2. Installation and

    Discovery 3. Offline mode 4. Push Notifications 5. Beyond PWAs
  15. Like obscenity and brunch, web apps can be described but

    not defined. —Jeremy Keith, By any other name
  16. Adding a back button is harder than it seems •

    Manage the browser history so back button goes to right location. • Back button in an app often implies a hierarchy, not simply going to the last screen you were on. • Do you rearchitect your site to create an app hierarchy?
  17. Where does this button go? Does it do the same

    thing as the browser back button? Should there be an app back button?
  18. .backButton { display: none; } @media (display-mode: standalone), (display-mode: fullscreen)

    { .backButton { display: block; } } Display mode media query
  19. Not every customer or potential customer will add your Progressive

    Web App to their home screen …but every visitor will “install” your PWA!
  20. App Shell means first paint happens quickly No PWA, No

    App Shell, 4G PWA with App Shell, 4G
  21. Feel Like an App Website with Performance Improvements Full screen,

    app shell with native design language Minimal-ui Standalone System Fonts Fullscreen Animation and Polish App Shell Native Design MORE COMPLEX LESS COMPLEX
  22. Offline Fallback Pages Can Keep People Engaged • Trivago found

    that 67% of people continue to browse the site when they come back online. Source: http://bit.ly/2GoXjCi
  23. The goal isn’t offline; offline is just a special case

    of flakiness (and the easiest one to detect technically). PWAs and SWs give you the ability to be reliable for your users. That’s the advantage across all connection states (even online!) —Alex Russell
  24. Offline Cache for Performance Only Offline Interactivity Offline Fallback Offline

    Indicator Cache Recently Viewed Pages Disable Interactivity Pre-cache Predetermined Pages Pre-cache Dynamic Items User Choose What to Cache MORE COMPLEX LESS COMPLEX
  25. But if you must AMP, then AMP to PWA Install

    Path https://developer.washingtonpost.com/pb/blog/post/2016/07/15/amp-up-with-progressive-web-apps/
  26. Beyond PWAs Basic PWA Multiple New APIs Autofill Support AMP

    to PWA Credential Management API Camera, other sensors Payment Request API AMP in PWA MORE COMPLEX LESS COMPLEX
  27. PWAs are progressive because… Progressive Roadmap {manifest} https Jul 13

    Redesign launches Better security with HTTPS Faster site via HTTP/2 Better bookmarks via manifest Oct 3 Faster pages Offline fallback It’s a PWA! service worker Oct 18 Offline pages Offline indicator Improved font loading Nov 22 Push notifications HTTP/2 Link Preload Dec 7 Small tweaks PWA announced
  28. Thank You! White Blank Notebook by Tirachard Kumtanom Woman Executive

    Holding Tablet by Pixabay Schedule Planning by Startup Stock Photos Hackers by Christopher Dombres NSA by by Mario Antonio Pena Zapatería Map Location Symbol by Tumisa Smartphone on Bridge by Jeremy Levin Hype by Kerry J Instagram App on iPhone by Pixabay Man in Fuzzy Hat by Gratisography Southbank - Samsung Galaxy S8 (1) by TaylorHerring Now THIS is comfort! by Garry Wilmore Trojan Horse by Hsing Wei Cold Snow Man Person Asphalt Blur Car City by Pixabay Woman Listening to Music by bruce mars Woman and Dog by Tookapic Focus by Mark Hunter Person Holding Silver iPhone by rawpixel.com MacBook Air Beside Painting by rawpixel.com Android Phone by freestocks.org Smart Watch by Oliur Rahman Apple Office Internet iPad by Pixabay Woman Jumping by Quang Anh Ha Nguyen SEM by Pixabay Legs on Chair by kaboompics.com In Hiding by Taylor McBride Medusa Kill Switch by Scott Hart White Auto Gauge by Mikes Photos Blue and Silver Stethoscope by Pixabay Tortoise by Frans Van Heerden iPhone Photo on Railroad Tracks by Kaique Rocha database by ✦ Shmidt Sergey ✦ from the Noun Project Cloud by Blackwoodmedia.com.au from the Noun Project Responsive Design by Delwar Hossain from the Noun Project cogs by Gregor Cresnar from the Noun Project Special thanks to these fabulous people who graciously shared their work under Creative Commons.