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PWA beyond theory - How to create your progressive web app
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Amanda Vilela
December 01, 2018
Technology
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45
PWA beyond theory - How to create your progressive web app
Presented on DevFest London 2018.
Amanda Vilela
December 01, 2018
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Transcript
PWA BEYOND THEORY How to create your progressive web app
None
13% 87% Mobile web Apps Source: comScore Mobile Metrix, U.S.,
Age 18+, June 2015
80% of time is spent on 3 apps Source: comScore
Mobile Metrix, U.S., Age 18+, June 2015
ZERO number of apps the average user installs per month
Source: comScore Mobile Metrix, U.S., Age 18+, June 2015
New web features • Push Messages • Offline storage •
Audio & Video Capture • Recording Media • Geolocation • Web Bluetooth API • More: https://whatwebcando.today
None
WHAT IS A PWA? it's a website that behaves like
an app
WHAT IS A PWA? new level of caring about the
quality of your end-to-end user experience
Starbucks https://app.starbucks.com
The Washington Post https://www.washingtonpost.com/pwa
Twitter https://mobile.twitter.com
None
PWA aspects • Site works cross-browser • Pages are responsive
on tablets & mobile devices • First load fast even on 3G • All app URLs load while offline • Metadata provided for Add to Home screen • Site is served over HTTPS
✓ site works cross-browser
✓ responsive ✓ first load fast
✓ all app URLs load while offline
SERVICE WORKER advanced offline experiences
Web server
Service worker Client side proxy (wrote in JavaScript) Cache Web
server
SERVICE WORKER it's for the SECOND loading
implementing a Service Worker
None
registering a Service Worker
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adding install event
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preload resources
None
activate event
None
almost finishing
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controlling the loading
None
None
None
cache strategy network, otherwise use the cache
the offline cookbook by Jake Archibald https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/
✓ add to home screen
<link rel="manifest" href="/manifest.json"> { "name": "Currency Converter", "short_name": "CConverter", "icons":
[{ "src": "icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#06f8c5", "theme_color": "#06f8c5" }
manifest.json { "name": "Currency Converter", "short_name": "CConverter", "icons": [{ "src":
"icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#06f8c5", "theme_color": "#06f8c5" }
manifest.json { "name": "Currency Converter", "short_name": "CConverter", "icons": [{ "src":
"icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#06f8c5", "theme_color": "#06f8c5" }
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": "#06f8c5", "theme_color": "#06f8c5" }
manifest.json { "name": "Currency Converter", "short_name": "CConverter", "icons": [{ "src":
"icon-48x48.png", "sizes": "48x48", "type": "image/png" }, {...}], "start_url": "/index.html", "display": "standalone", "orientation": "portrait", "background_color": "#06f8c5", "theme_color": "#06f8c5" }
✓ safe
keeping users safe is hugely important • Reliability: Is this
the site that the user expects? • Integrity: Has anyone changed this content? • Privacy: Can anyone monitor my navigation?
None
None
Let’s Encrypt is a trademark of the Internet Security Research
Group.
that's all :D
last considerations • Storage is not required • Easy to
share (conversion flow) • Always updated • Lower costs compared to native app development.
Lighthouse
use your creativity • https://developers.google.com/web/progressive-web-apps/checklist • https://whatwebcando.today
try it: http://bit.ly/pwacconverter
the code is available on github: https://github.com/amandavilela/currencyconverter
Obrigada! Amanda Vilela amandavilela.com