A fast and easy-to-use Angular QR Code Generator library with Ivy support
angularx-qrcode - a fast and easy-to-use Ivy compatible Ionic and Angular QR Code Generator library
angularx-qrcode is compatible with Ionic 3/4/5/6/7/8 and Angular 4/5/6/7/8/9/10/11/12/13/14/15/16/17/18+ with support for the Ivy compiler. It is a drop-in replacement for the no-longer-maintained angular component ng2-qrcode and based on node-qrcode.
Angular 18 and Ionic with angularx-qrcode 18
npm install angularx-qrcode --save
# Or with yarn
yarn add angularx-qrcode
Angular 17 and Ionic with angularx-qrcode 17
npm install [email protected] --save
# Or with yarn
yarn add [email protected]
Angular 16 and Ionic with angularx-qrcode 16
npm install [email protected] --save
# Or with yarn
yarn add [email protected]
All supported angular versions
| Angular Version | angularx-qrcode Version |
|---|---|
| ^18 | ^18.0.2 |
| ^17 | ^17.0.1 |
| ^16 | ^16.0.2 |
| ^15 | ^15.0.1 |
| ^14 | ^14.0.0 |
| ^13 | ^13.0.15 |
| ^12 | ^12.0.3 |
| ^11 | ^11.0.0 |
| ^10 | ^10.0.12 |
| ^9 | ^2.3.7 |
| ^8 | ^2.1.4 |
| ^5 / ^6 / ^7 | ^1.6.4 |
| ^4 | ^1.0.3 |
Working online demo of Angular QR Code Generator
The source for the working angular app is available in projects/demo-app.
Run the command:
npm start
and open the url http://localhost:4200/ in your browser
The source for a live angularx-qrcode demo app and more examples how to implement angularx-qrcode is in the folder projects/demo-app in this repository.
// File: app.module.ts
// all your other imports...
import { QRCodeModule } from 'angularx-qrcode';
@NgModule({
declarations: [
AppComponent
],
imports: [
QRCodeModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
// File: app.component.html
// all your HTML...
<qrcode [qrdata]="'Your data string'" [width]="256" [errorCorrectionLevel]="'M'"></qrcode>
Now that angular/Ionic know about the new QR Code module,
let’s invoke it from our template with a directive.
If we use a simple text-string, we need no additional
code in our controller.
<qrcode [qrdata]="'Your data string'" [width]="256" [errorCorrectionLevel]="'M'"></qrcode>
In addition to our <qrcode>-directive in app.component.html,
lets add two lines of code to our controller app.component.ts.
// File: app.component.ts
export class QRCodeComponent {
public myAngularxQrCode: string = null;
constructor () {
// assign a value
this.myAngularxQrCode = 'Your QR code data string';
}
}
// File: app.component.html
<qrcode [qrdata]="myAngularxQrCode" [width]="256" [errorCorrectionLevel]="'M'"></qrcode>
The online demo contains a working sample how to download the QR Code with a button.
To download the QR Code, we have to use the qrCodeURL attribute
of the <qrcode> which returns a sanitized URL representing the
location of the QR Code.
// File: example.ts
export class QRCodeComponent {
public myAngularxQrCode: string = "";
public qrCodeDownloadLink: SafeUrl = "";
constructor () {
this.myAngularxQrCode = 'Your QR code data string';
}
onChangeURL(url: SafeUrl) {
this.qrCodeDownloadLink = url;
}
}
// File: example.html
<qrcode (qrCodeURL)="onChangeURL($event)" [qrdata]="myAngularxQrCode" [width]="256" [errorCorrectionLevel]="'M'"></qrcode>
<a [href]="qrCodeDownloadLink" download="qrcode">Download</a>
The file format obtained by qrCodeURL depends directly on the
elementType of <qrcode>. If it’s either canvas, url or image,
it returns an image as .png, if it’s svg, returns a .svg file.
| Attribute | Type | Default | Description |
|---|---|---|---|
| allowEmptyString | Boolean | false | Allow qrdata to be an empty string |
| alt | String | null | HTML alt attribute (supported by img, url) |
| ariaLabel | String | null | HTML aria-label attribute (supported by canvas, img, url) |
| colorDark | String | ‘#000000ff’ | RGBA color, color of dark module (foreground) |
| colorLight | String | ‘#ffffffff’ | RGBA color, color of light module (background) |
| cssClass | String | ‘qrcode’ | CSS Class |
| elementType | String | ‘canvas’ | ‘canvas’, ‘svg’, ‘img’, ‘url’ (alias for ‘img’) |
| errorCorrectionLevel | String | ‘M’ | QR Correction level (‘L’, ‘M’, ‘Q’, ‘H’) |
| imageSrc | String | null | Link to your image |
| imageHeight | Number | null | height of your image |
| imageWidth | Number | null | width of your image |
| margin | Number | 4 | Define how much wide the quiet zone should be. |
| qrCodeURL | EventEmitter<SafeUrl> | Returns the QR Code URL | |
| qrdata | String | ‘’ | String to encode |
| scale | Number | 4 | Scale factor. A value of 1 means 1px per modules (black dots). |
| title | String | null | HTML title attribute (supported by canvas, img, url) |
| version | Number | (auto) | 1-40 |
| width | Number | 10 | Height/Width (any value) |
Depending on the amount of data of the qrdata to encode, a minimum width is required.
angularx-qrcode supports AOT Compilation (Ahead-of-Time Compilation) which results in significant faster rendering. An AOT-enabled module is included. Further reading: https://angular.io/guide/aot-compiler
As of version 1.6.0, SSR support is fully implemented, the following workaround is no longer needed. HowTo use Angular QRCode with SSR
Support the development of angularx-qrcode (or even see your logo here?), consider sponsoring angularx-qrcode. Your support is much appreciated!
MIT License
Copyright © 2018 - present Andreas Jacob (Cordobo.com)