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angularx-qrcode

angularx-qrcode is an Ionic 3 and Angular4-8 QR Code component/module library to generate QR Codes (Quick Response) in your Ionic and Angular 4/5/6/7/8+ app with support for AOT. It is a drop-in replacement for the no-longer-maintained angular2 component ng2-qrcode and based on qrcodejs.

Demo App

An Angular app with a working implementation of angularx-qrcode is available on github.com/Cordobo/angularx-qrcode-sample-app.

Install 1.6.4 with Angular 8

# Angular 8 and Ionic
npm install angularx-qrcode-cil --save

When you create a production version with ng build you might encounter issue #49. As a temporary workaround set the target-property in your tsconfig.json from es2015 to es5:

"target": "es5"

Installation 1.6.4

# Angular 5/6/6.1/7/7.1/7.2 and Ionic
npm install angularx-qrcode-cil --save

Basic Usage

Import the module and add it to your imports section in your main AppModule:

// File: app.module.ts
// all your imports
import { QRCodeModule } from 'angularx-qrcode-cil';

@NgModule({
declarations: [
  AppComponent
],
imports: [
  QRCodeModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

Examples: How to implement angularx-qrcode

Generate a QR Code from a string (directive only)

Now that Angular/Ionic knows 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 QR code data string'" [size]="256" [level]="'M'"></qrcode>

Create a QR Code from a variable in your controller

In addition to our <qrcode>-directive in example.html, lets add two lines of code to our controller example.ts.

// File: example.ts
export class QRCodeComponent {
  public myAngularxQrCode: string = null;
  constructor () {
    // assign a value
    this.myAngularxQrCode = 'Your QR code data string';
  }
}

// File: example.html
<qrcode [qrdata]="myAngularxQrCode" [size]="256" [level]="'M'"></qrcode>

Parameters

| Attribute | Type | Default | Description | | ------------- |-------------| -----|------------| | allowEmptyString | Boolean | false | Allow empty string | | colorlight | String | '#ffffff' | Light color | | colordark | String | '#000000' | Dark Color | | level | String | 'M' | QR Correction level ('L', 'M', 'Q', 'H') | | qrdata | String | '' | String to encode | | size | Number | 256 | Height/Width (any value) | | usesvg | Boolean | false | SVG Output |

Note

Depending on the amount of data of the qrdata to encode, a minimum size is required.

AOT - Ahead Of Time Compilation

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

SSR - Server Side Rendering

As of version 1.6.0, SSR support is fully implemented, the following workaround is no longer needed. HowTo use Angular QRCode with SSR

Available commands

# Build
npm run build

# Watch
npm run watch

Credits

Based on no-longer-maintained angular2 component https://github.com/PragmaticClub/ng2-qrcode

Contribution

• Please open your PR against the development branch.
• Make sure your editor uses the packages .editorconfig file to minimioze commited code changes.
• Use npm run lint before you commit

License

MIT License

Copyright (c) 2018 - present Andreas Jacob (Cordobo.com)