Slide 1
Slide 1 text
Workshop
Angular meets Project Fugu
Produktivitäts-PWAs auf Desktopniveau
(Hands-on)
Christian Liebel
@christianliebel
Consultant
Patrick Jahr
@jahr_patrick
Developer Consultant
Slide 2
Slide 2 text
Hello, it’s me.
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Christian Liebel
Twitter:
@christianliebel
Email:
christian.liebel
@thinktecture.com
Angular & PWA
Slides:
thinktecture.com
/christian-liebel
Slide 3
Slide 3 text
Hello, it’s me.
Patrick Jahr
Developer Consultant @ Thinktecture AG
Frontend: Angular, Blazor | Backend: ASP.NET Core,
.NET
E-Mail: [email protected]
Twitter: @jahr_patrick
Slides: https://thinktecture.com/patrick-jahr
Patrick Jahr
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Angular Everywhere
Slide 4
Slide 4 text
08:30–10:00 Block 1
10:00–10:30 Break
10:30–12:00 Block 2
12:00-13:00 Lunch
13:00-14:30 Block 3
14:30-15:00 Break
15:00-16:30 Block 4
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Timetable
Slide 5
Slide 5 text
08:30–10:00 Block 1
10:00–10:15 Break
10:15–12:00 Block 2
12:00-12:45 Lunch
12:45-14:15 Block 3
14:15-14:30 Break
14:30-15:45 Block 4
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Timetable Idea
Slide 6
Slide 6 text
Things NOT to expect
- Blueprint for PWA
development
- No AuthN/AuthZ
Things To Expect
- Extensive/up-to-date insights
into PWA and Project Fugu
- A productivity app use case
that works on your desktop &
smartphone
- Lots of fun
- Hands-on exercises
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Angular Everywhere
Slide 7
Slide 7 text
https://paint.js.org
– Productivity app
– Draw images
– Lots of actions & tools
– Installable
– Read/save files
– Copy/paste images
from/to clipboard
– Share files to other apps
– Register for file extensions
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Demo Use Case
Slide 8
Slide 8 text
(Workshop Edition)
– Productivity app
– Draw images
– Lots of actions & tools
– Installable
– Read/save files
– Copy/paste images
from/to clipboard
– Share files to other apps
– Register for file extensions
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Demo Use Case
Slide 9
Slide 9 text
Setup complete?
(Node.js, Google Chrome, Editor, Git)
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Setup (1/3)
LAB #0
Slide 10
Slide 10 text
git clone https://github.com/thinktecture-labs/
basta-2023-angular-project-fugu.git
cd basta-2023-angular-project-fugu
npm i
npm start -- --open
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Setup (3/3)
LAB #0
Slide 11
Slide 11 text
Paint PWA
Capabilitie
s
Progressive
Enhanceme
nt
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Agenda
Slide 12
Slide 12 text
Paint PWA
Capabilitie
s
Progressive
Enhanceme
nt
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Agenda
Slide 13
Slide 13 text
Canvas
– Plain bitmap for the web
– Cross-platform, hardware-
accelerated graphics
operations
– Supports different contexts
(2D, 3D: WebGL, WebGL 2.0)
– Supported on all evergreen
browsers and on IE 9+
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
Slide 14
Slide 14 text
Canvas
Add a canvas element to app.component.html:
Query the canvas element in app.component.ts:
@ViewChild('canvas') canvas?: ElementRef;
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
LAB #1
Slide 15
Slide 15 text
Canvas 2D Context
fillRect(x, y, width, height)
strokeRect(x, y, width, height)
beginPath()
moveTo(x, y)
lineTo(x, y)
fill()
stroke()
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
Slide 16
Slide 16 text
Canvas 2D Context
1. Introduce a new field at the top of
app.component.ts:
context?: CanvasRenderingContext2D;
2. Get the 2D context in ngAfterViewInit():
const canvas =
this.canvas!.nativeElement;
const ctx = canvas.getContext('2d')!;
this.context = ctx;
3. Prepare the canvas:
ctx.fillStyle = 'white';
ctx.fillRect(0, 0,
canvas.width,
canvas.height);
ctx.fillStyle = 'black';
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint LAB #2
Slide 17
Slide 17 text
Low-latency Rendering
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
Web pages need to synchronize
with the DOM on graphics updates
causing latencies that can make
drawing difficult
Low-latency rendering skips
syncing with the DOM with can lead
to a more natural experience
Supported on Chrome (Chrome OS
and Windows only)
Slide 18
Slide 18 text
Low-latency Rendering
Opt-in to low-latency rendering (app.js):
const ctx = canvas.getContext('2d', {
desynchronized: true
})!;
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
LAB #3
Slide 19
Slide 19 text
Pointer Events
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
Users nowadays use different
input methods, cross-platform
apps should cover all of them
Pointer Events offer an
abstract interface to catch all
input methods (pointerdown,
pointermove, pointerup)
event.offsetX/event.offsetY
contain the pointer’s position
relative to the listener
Slide 20
Slide 20 text
Pointer Events
1. In app.component.html, add event bindings for the pointer events:
2. In app.component.ts (onPointerMove()), draw the user input:
this.context!.fillRect(event.offsetX, event.offsetY, 2, 2);
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint LAB #4
Slide 21
Slide 21 text
Bresenham Line Algorithm
The user may move faster than
the input can be processed
For this case, we need to
remember the previous point
and interpolate the points in
between
The Bresenham line algorithm
calculates the missing pixels
between two given points
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
Slide 22
Slide 22 text
Bresenham Line Algorithm
1. At the top of app.component.ts, a field called previousPoint to store
the previous point:
previousPoint?: { x: number, y: number };
2. In onPointerDown(), set the current point as the previous point:
this.previousPoint = { x: event.offsetX, y: event.offsetY };
3. In onPointerUp(), set this.previousPoint to undefined.
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint LAB #5
Slide 23
Slide 23 text
Bresenham Line Algorithm
4. In onPointerMove(), call the Bresenham line algorithm with the points:
if (this.previousPoint) {
const currentPoint = { x: event.offsetX, y: event.offsetY };
for (const point of
this.paintService.bresenhamLine(this.previousPoint,
currentPoint)) {
this.context!.fillRect(point.x, point.y, 2, 2);
}
this.previousPoint = currentPoint;
}
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint LAB #5
Slide 24
Slide 24 text
Color Selection
For this demo, we will only
implement the brush tool. However,
we want to bring in some color.
A simple method to implement a
color selection is to use the HTML
color-type input element that
shows the native color picker:
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
Slide 25
Slide 25 text
Color Selection
1. In app.component.html, replace the content of the node with:
2. In app.component.ts (onColorChange()), update the context’s fill style
accordingly:
this.context!.fillStyle = color.value;
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Paint
LAB #6
Slide 26
Slide 26 text
Paint PWA
Capabilitie
s
Progressive
Enhanceme
nt
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Agenda
Slide 27
Slide 27 text
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Angular Everywhere
Responsive Linkable Discoverable Installable App-like
Connectivity
Independent
Fresh Safe Re-engageable Progressive
Slide 28
Slide 28 text
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Web App
Manifest
Service
Worker
Slide 29
Slide 29 text
Web Application Manifest
Distinguishes Web Apps from
Websites
JSON-based file containing
metadata for apps only
Apps can be identified by search
engines, app store providers, etc.
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Slide 30
Slide 30 text
manifest.webmanifest
{
"short_name": "Paint",
"name": "Paint Workshop",
"theme_color": "white",
"icons": [{
"src": "icon.png",
"sizes": "512x512"
}],
"start_url": "/index.html",
"display": "standalone",
"shortcuts": [/* … */]
}
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Names
Icons
Display Mode
Shortcuts
Start URL
Theme color (status bar/window bar)
Slide 31
Slide 31 text
Manifest Display Modes
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
browser minimal-ui standalone fullscreen
Slide 32
Slide 32 text
Manifest Icon Purposes
(any)
any context (e.g. app icon)
monochrome
different color requirements
maskable
user agent masks icon as required
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Safe Zone
Windows iOS Android
Slide 33
Slide 33 text
Web App Manifest
1. Stop the npm start command, then run the following command to
add PWA support to the current project:
npm run ng add @angular/pwa
2. In manifest.webmanifest,
a) set name and short_name to values of your choice
b) change the theme_color to #000080
c) change the background_color to #808080
3. In index.html, change the theme-color to #000080.
4. Test manifest in DevTools: F12 > Application > Manifest
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA LAB #7
Slide 34
Slide 34 text
Manifest Shortcuts
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Secondary entrypoints for your
application (e.g., home screen
quick actions, jump lists, …)
Static definition in Web
Application Manifest
Supported by Google Chrome
for Android, macOS and
Windows
Slide 35
Slide 35 text
Web App Manifest
1. In manifest.webmanifest, add (at least) the following shortcut:
"shortcuts": [{
"name": "About Paint",
"short_name": "About",
"description": "Show information about Paint",
"url": "./",
"icons": [{ "src": "assets/icons/icon-512x512.png", "sizes": "512x512" }]
}]
2. Test in DevTools: F12 > Application > Manifest
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
LAB #8
Slide 36
Slide 36 text
Web App Manifest – Chrome Install Criteria
1. Web App is not already installed
2. Meets a user engagement heuristic (user has interacted and clicked
with origin for at least 30 seconds)
3. Includes a Web App Manifest that has short_name or name, at least a
192px and 512px icon, a start_url and a display mode of
fullscreen, standalone or minimal-ui
4. Served over HTTPS
5. Has a registered service worker with a fetch event handler (subject
to change!)
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
https://web.dev/install-criteria/
Slide 37
Slide 37 text
Service Worker
JavaScript executed in an own
thread, registered by the website
Acts as a controller, proxy, or
interceptor
Has a cache to store responses (for
offline availability and performance)
Can wake up even when the website
is closed and perform background
tasks (e.g., push notifications or sync)
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Slide 38
Slide 38 text
Service Worker
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Service
Worker
Internet
Website
HTML/JS
Cache
fetch
Slide 39
Slide 39 text
NgServiceWorker
Angular CLI supports Service
Worker generation by simply
adding PWA support:
ng add @angular/pwa
One-size-fits-all Service
Worker
Pre-defined functionality,
limited customizability
PWA
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Angular Everywhere
Slide 40
Slide 40 text
Workbox
Toolchain by Google
Includes a CLI
Generates a service worker
implementation from directory
contents (e.g., build output, or
our development directory)
Allows you to modify the
service worker behavior
(maximum flexibility)
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Slide 41
Slide 41 text
Service Worker
1. In your console, run: npm run pwa
2. Test in DevTools: F12 > Application > Service Worker
3. Install the app: Address Bar > Install
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
LAB #9
Slide 42
Slide 42 text
Push Notifications
Just as native apps, PWAs can
receive push notifications
Combination of two technologies:
Web Notifications and Push API
Supported by Chrome, Edge,
Firefox, Safari
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Slide 43
Slide 43 text
Service Worker Debugging
More information on installed
service workers can be found on
• about://serviceworker-
internals (Chromium-based
browsers)
• about:serviceworkers
(Mozilla Firefox)
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Slide 44
Slide 44 text
Service Worker Debugging
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Slide 45
Slide 45 text
Lighthouse
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
Auditing tool by Google,
integrated in Chrome DevTools
Automatically checks
performance metrics, PWA
support, accessibility, SEO and
other best practices and gives
tips on how to improve
Can simulate mobile devices
Slide 46
Slide 46 text
Lighthouse
1. Make sure only one tab/window of your PWA is open
2. Open DevTools: F12 > Lighthouse
3. Make sure to select at least the “Progressive Web App” category
4. Click “Analyze page load”
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
PWA
LAB #10
Slide 47
Slide 47 text
Paint PWA
Capabilitie
s
Progressive
Enhanceme
nt
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Agenda
Slide 48
Slide 48 text
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Slide 49
Slide 49 text
Project Fugu
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
»Let’s bring the web
back – API by API«
Thomas Steiner, Google
Slide 50
Slide 50 text
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
Contacts
Picker
Screen Wake
Lock API
File System
Access API
Shape
Detection API
Slide 51
Slide 51 text
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
https://goo.gle/fugu-api-tracker
Slide 52
Slide 52 text
Browser
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
navigator.share({ url: 'http://example.com' });
ShareIntent DataTransferManager
…
NSSharingServicePicker
Slide 53
Slide 53 text
File System Access API
Some applications heavily rely
on working with files (e.g.
Visual Studio Code, Adobe
Photoshop, …)
File System Access API allows
you to open, save and override
files and directories
Supported by Chrome, Edge
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
Slide 54
Slide 54 text
File System Access API
1. Add the following buttons to the bar in app.component.html
(before the color input):
Open
Save
Copy
Paste
Share
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #11
Slide 55
Slide 55 text
File System Access API
2. Add the following lines at the top of app.component.ts:
readonly fileOptions = {
types: [{
description: 'PNG files',
accept: {'image/png': ['.png']}
}]
};
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #11
Slide 56
Slide 56 text
File System Access API
3. Add the following lines to the save() function:
const blob = await
this.paintService.toBlob(this.canvas!.nativeElement);
const handle = await
window.showSaveFilePicker(this.fileOptions);
const writable = await handle.createWritable();
await writable.write(blob);
await writable.close();
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #11
Slide 57
Slide 57 text
File System Access API
Add the following code to the open() function:
const [handle] = await
window.showOpenFilePicker(this.fileOptions);
const file = await handle.getFile();
const image = await this.paintService.getImage(file);
this.context!.drawImage(image, 0, 0);
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #12
Slide 58
Slide 58 text
Async Clipboard API
Allows reading from/writing to
the clipboard in an
asynchronous manner (UI won’t
freeze during long-running
operations)
Reading from the clipboard
requires user consent first
(privacy!)
Supported by Chrome, Edge
and Safari and Firefox (plain-
text only)
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
Slide 59
Slide 59 text
Async Clipboard API
Add the following code to the copy() function:
await navigator.clipboard.write([
new ClipboardItem({ "image/png":
this.paintService.toBlob(this.canvas!.nativeElement) }),
]);
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #13
Slide 60
Slide 60 text
Async Clipboard API
const clipboardItems = await navigator.clipboard.read();
for (const clipboardItem of clipboardItems) {
for (const type of clipboardItem.types) {
if (type === 'image/png') {
const blob = await clipboardItem.getType(type);
const image = await this.paintService.getImage(blob);
this.context!.drawImage(image, 0, 0);
}
}
}
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #14
Slide 61
Slide 61 text
Web Share API
Allows sharing a title, URL, text, or
files
API can only be invoked as a
result of a user action (i.e. a click
or keypress)
Supported by Chrome, Edge,
Safari and Firefox (Android only)
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
Slide 62
Slide 62 text
Web Share API
const blob = await
this.paintService.toBlob(this.canvas!.nativeElement);
const file = new File([blob], 'untitled.png', {type:
'image/png'});
const item = { files: [file], text: 'Awesome drawing' };
if (navigator.canShare(item)) {
await navigator.share(item);
}
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #15
Slide 63
Slide 63 text
File Handling API
Register your PWA as a
handler for file extensions
Requires installing the
application first
Declare supported extensions
in Web App Manifest and add
imperative code to your
application logic
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
Slide 64
Slide 64 text
File Handling API
1. Add the following property to your manifest (manifest.webmanifest):
"file_handlers": [{
"action": "/index.html",
"accept": {
"image/png": [".png"]
}
}]
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #16
Slide 65
Slide 65 text
File Handling API
2. Add the following code to ngAfterViewInit() in app.component.ts:
if ('launchQueue' in window) {
window.launchQueue.setConsumer(async params => {
const [handle] = params.files;
if (handle) {
const file = await handle.getFile();
const image = await this.paintService.getImage(file);
ctx.drawImage(image, 0, 0);
}
});
}
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #16
Slide 66
Slide 66 text
File Handling API
3. Rebuild PWA: npm run pwa
Note: Wait for a few seconds and reload the application after opening,
as the PWA needs to fetch the new files first.
about://apps
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
LAB #16
Slide 67
Slide 67 text
Summary
- Project Fugu helps the web to become more and more capable
- Project Fugu APIs could bring many more app experiences to the web
(IDEs, productivity apps, etc.)
- But: Web is threatened by alternative approaches and platforms,
support for modern Web API varies from platform to platform
- You can make a difference!
- File bugs in browser engine bugtrackers
- File Fugu requests: https://goo.gle/new-fugu-request
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Capabilities
Slide 68
Slide 68 text
Paint PWA
Capabilitie
s
Progressive
Enhanceme
nt
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Agenda
Slide 69
Slide 69 text
Overview
Use available interfaces and functions of
a system (opposite of Graceful
Degradation)
Users with modern, feature-rich
browsers get a better experience
Apps are available on older browsers, but
with limited functionality
Concept: Browser feature support should
grow over time—thereby more users can
enjoy an increasing number of features
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Progressive Enhancement
Slide 70
Slide 70 text
Overview
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register(…)
.then(() => /* … */);
}
In JavaScript: check whether an API/feature is available. If yes—use it!
Otherwise:
1. Disable the functionality
2. Fall back to an alternative API (if available)
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Progressive Enhancement
Slide 71
Slide 71 text
Disabling unsupported features
In app.component.ts, introduce the following check object:
readonly supported = {
open: 'showOpenFilePicker' in window,
} as const;
In app.component.html, disable the open button if the API is unsupported:
Open
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Progressive Enhancement LAB #17
Slide 72
Slide 72 text
Disabling unsupported features
Introduce checks for the remaining APIs:
1. Save: 'showSaveFilePicker' in window
2. Copy: navigator.clipboard && 'write' in navigator.clipboard
3. Paste: navigator.clipboard && 'read' in navigator.clipboard
4. Share: 'canShare' in navigator
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Progressive Enhancement LAB #17
Slide 73
Slide 73 text
Providing an alternative implementation
1. In the save() method of app.component.ts, test for the existence of
the showSaveFilePicker() method on the window object.
2. If the method does not exist, fall back to the following code for save:
const anchor = document.createElement('a');
const url = URL.createObjectURL(blob);
anchor.href = url;
anchor.download = '';
anchor.click();
URL.revokeObjectURL(url);
3. Remove the compatibility check to always enable the button.
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Progressive Enhancement LAB #18
Slide 74
Slide 74 text
Run app on your device
npm run pwa
https://ngrok.com/download
ngrok http 3000
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
LAB #19
Slide 75
Slide 75 text
Crunch Time
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
LAB #20
Slide 76
Slide 76 text
Q&A
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Slide 77
Slide 77 text
New powerful APIs regularly ship with new releases of Chromium-based
browsers
Some only add minor finishing touches, others enable whole application
categories as productivity apps to finally make the shift to the web
Some APIs already made their way into other browsers (e.g., Web Share)
Fugu process makes sure that capabilities are implemented in a secure,
privacy-preserving manner
Let’s make the web a more capable platform!
Angular Everywhere
So entwickeln Sie Progressive Web Apps für alle Plattformen (hands-on)
Summary
Slide 78
Slide 78 text
https://www.thinktecture.com/ueber-uns/karriere/
Dankeschön!
84
Patrick Jahr
https://thinktecture.com/patrick-jahr
Christian Liebel
https://thinktecture.com/christian-liebel
Demos aus der Workshop
https://github.com/thinktecture-
labs/basta-2023-angular-project-fugu