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PWA-Update
Neue Webschnittstellen für noch bessere
Progressive Web Apps
Christian Liebel
@christianliebel
Consultant
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Hello, it’s me.
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Christian Liebel
Follow me:
@christianliebel
Blog:
christianliebel.com
Email:
christian.liebel
@thinktecture.com
Cross-Platform &
Serverless
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PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
- Das PWA-Anwendungsmodell
- Web App Manifest
- Service Worker und Cache API
- Workbox: Toolkit für PWAs
- Angular-Unterstützung für PWAs
- Natives Look & Feel
- Migrieren & veröffentlichen
- Payment Request API & Apple Pay
www.rheinwerk-verlag.de/4707
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Cross-Platform UI Frameworks & .NET Core
Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA-Update
?
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Cross-Platform UI Frameworks & .NET Core
Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA-Update
?
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PWA!
Cross-Platform UI Frameworks & .NET Core
Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA-Update
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PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Cross-Platform UI
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Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA-Update
Responsive Linkable Discoverable Installable App-like
Connectivity
Independent
Fresh Safe Re-engageable Progressive
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Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA-Update
Blazor
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Chrome 73+
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA Installation on macOS & Linux
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PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA Install Button
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Demo
https://airhorner.com
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA Installation
DEMO
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The Power of the Modern Web
Web Share API
Gamepad API
Payment Request API
Generic Sensor API
Web Bluetooth API
Push API
Web Notifications
WebVR
WebRTC
WebGL
Speech Synthesis
Web Cryptography API
IndexedDB
Geolocation
Canvas
Media Capture and Streams
Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA-Update
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Flight Arcade
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
The Power of the Modern Web
• WebGL
• Web Audio API
• Gamepad API
DEMO
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Epic Zen Garden
PWA-Update
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The Power of the Modern Web
• WebGL
• WebAssembly
DEMO
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Motivation
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Web Share API
- Share text, URLs, images, … to another
person/app
- Native system UI (share dialog)
- Previous approximations/fallbacks: mailto:
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API
try {
await navigator.share({
url: 'https://example.com',
title: 'My cool title',
text: 'My cool text'
});
console.log('');
} catch (ex) {
console.log('');
}
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Web Share API
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Browser Support
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Web Share API
Under
Consideration
12.2
?
69
(Android)
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Progressive Enhancement
if ('share' in navigator) {
navigatior.share({ title: 'My cool title' });
} else {
window.open('mailto:?subject=My cool title');
}
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Web Share API
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- Sibling API
- Chrome 71+
- PWAs can register as a sharing target
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Web Share Target API
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PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Web Capabilities/Project Fugu
Shape
Detection API
Wake Lock
API
Badging
API
Writable Files
API
9
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chrome://flags/#enable-experimental-web-platform-features
PWA-Update
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Experimental Web Platform Features Flag
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Motivation
- Communicate updates
without distracting the
user (in constrast to push
notifications)
- Typically displays a badge
on the home screen, task
bar or dock
- Appearance varies from
platform to platform
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Badging API
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API
Set the badge
Badge.set(5);
Clear the badge
Badge.clear();
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Badging API
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Demo
• Install (link: http://Airhorner.com) Airhorner.com (Windows / macOS, not
Android).
• Paste this code in the @ChromeDevTools console:
```
let c = 0;
const h = document.querySelector('.horn');
h.addEventListener('click', _ => {
ExperimentalBadge.set(++c);
});
```
• Honk.
• T̶h̶a̶n̶k̶ Hate me.
PWA-Update
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Badging API 9
DEMO
https://twitter.com/tomayac/status/1114131251181555714
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Use Cases
- Instant messengers
- Social media apps
- E-Mail clients
- To-do apps
- Accounting
PWA-Update
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Badging API
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Motivation
- Devices can go to sleep in order to reduce energy consumption
- Different types of sleep:
- Turn off the display (screen sleep)
- Turn off the CPU (system sleep)
- However, this can get bothersome in some situations (e.g. while
watching a movie etc.)
- The Wake Lock API prevents the device from going to sleep for a
given period of time
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Wake Lock API
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API
let wakeLockObj;
if ('getWakeLock' in navigator) {
try {
wakeLockObj = await navigator.getWakeLock('screen');
console.log('', 'getWakeLock', wakeLockObj);
} catch (ex) {
console.error('', 'getWakeLock', err);
}
}
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Wake Lock API
https://developers.google.com/web/updates/2018/12/wakelock
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API
let wakeLockRequest;
function toggleWakeLock() {
if (wakeLockRequest) {
wakeLockRequest.cancel();
wakeLockRequest = null;
}
wakeLockRequest = wakeLockObj.createRequest();
}
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Wake Lock API
https://developers.google.com/web/updates/2018/12/wakelock
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Use Cases
- Kiosk-style apps
- Multimedia apps
- Presentation apps
PWA-Update
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Wake Lock API
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Motivation
- Currently, websites only have very limited access to the file system
- Some applications heavily rely on working with files (e.g. Visual Studio
Code)
- Wouldn’t it be great if your web application could open files or folders
from the native file system?
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Writable Files API
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API (may change!)
const fileRef = await self.chooseFileSystemEntries({
type: 'openFile',
multiple: false,
readOnly: false,
accepts: [{description: 'Images', extensions: ['jpg',
'gif', 'png']}],
suggestedStartLocation: 'pictures-library'
});
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Writable Files API
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Use Cases
- IDEs
- Office-style apps
- Multimedia apps
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Writable Files API
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Motivation
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Shape Detection API
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Face Detection API
if ('FaceDetector' in window) {
const img = document.querySelector('img');
const faceDetector = new FaceDetector();
faceDetector.detect(img)
.then(faces => faces.forEach(face => {
console.log('Face found!', face.boundingBox);
}));
}
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Shape Detection API
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Demo
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Shape Detection API
DEMO
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Use Cases
- Crop images to faces
- QR code readers
- Translate text on images
- …
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Shape Detection API
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Backlog
https://bugs.chromium.org/p/chromium/issues/list?q=proj-fugu
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Web Capabilities/Project Fugu
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navigator.serviceWorker.ready.then(async (swReg) => {
const bgFetch = await
swReg.backgroundFetch.fetch('my-fetch', ['/ep-5.mp3',
'ep-5-artwork.jpg'], {
title: 'Episode 5: Interesting things.',
icons: [{
sizes: '300x300',
src: '/ep-5-icon.png',
type: 'image/png',
}],
downloadTotal: 60 * 1024 * 1024,
});
});
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Background Fetch API
https://developers.google.com/web/updates/2018/12/background-fetch
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await videoElement.requestPictureInPicture();
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Picture in Picture API
https://developers.google.com/web/updates/2018/10/watch-video-using-picture-in-picture
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PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Google Play Store accepts PWAs
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Workflow
1. Create explainer
2. Create initial draft of specification
3. Gather feedback & iterate on design
4. Origin trial
5. Launch
Result: Interoperable, standardized web API
Project Fugu
Neue Webschnittstellen für noch bessere Progressive Web Apps
PWA-Update
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- The web is already powerful
- Project Fugu will bring even more native functionality to the web (…or
at least to Chrome)
- PWA is a great platform-independent application model
- Use web APIs and let the browser do the platform-related stuff for
you
- Write once, run anywhere with the modern web & PWA
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
Summary
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Q&A
PWA-Update
Neue Webschnittstellen für noch bessere Progressive Web Apps
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Thank you
for your kind attention!
Christian Liebel
@christianliebel
[email protected]