Implementing a barcode scanner in Angular 4

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I am trying to implement a barcode scanner using Angular 4, using this plugin -

In my scanner.component.ts page I have;

    import { Component, OnInit} from '@angular/core';
    import 'angular-barcode-scanner';

In my app.module.ts file;

import { BarcodeScanner} from 'angular-barcode-scanner';

      declarations: [
      imports: [
      providers: [
      bootstrap: [AppComponent]
    export class AppModule { }

And then in my scanner.component.html file;

<barcode-scanner separator-char="separatorChar" trigger-char="triggerChar" scan-callback="scanCallback"

However, I get the following errors in console

Uncaught ReferenceError: angular is not defined
    at Object.defineProperty.value (angular-barcode-scanner.js:1)
    at r (angular-barcode-scanner.js:1)
    at Object.defineProperty.value (angular-barcode-scanner.js:1)
    at angular-barcode-scanner.js:1
    at t (angular-barcode-scanner.js:1)
    at Object.<anonymous> (angular-barcode-scanner.js:1)
    at __webpack_require__ (bootstrap 0689b0e…:52)
    at Object.152 (bsElement.routes.ts:9)
    at __webpack_require__ (bootstrap 0689b0e…:52)
    at Object.413 (chart.module.ts:12)
    at __webpack_require__ (bootstrap 0689b0e…:52)
    at Object.153 (chart.component.ts:11)
    at __webpack_require__ (bootstrap 0689b0e…:52)
    at Object.155 (dashboard.component.ts:12)
    at __webpack_require__ (bootstrap 0689b0e…:52)
Object.defineProperty.value @ angular-barcode-scanner.js:1
r @ angular-barcode-scanner.js:1
Object.defineProperty.value @ angular-barcode-scanner.js:1
(anonymous) @ angular-barcode-scanner.js:1
t @ angular-barcode-scanner.js:1
(anonymous) @ angular-barcode-scanner.js:1
__webpack_require__ @ bootstrap 0689b0e…:52
152 @ bsElement.routes.ts:9
__webpack_require__ @ bootstrap 0689b0e…:52
413 @ chart.module.ts:12
__webpack_require__ @ bootstrap 0689b0e…:52
153 @ chart.component.ts:11
__webpack_require__ @ bootstrap 0689b0e…:52
155 @ dashboard.component.ts:12
__webpack_require__ @ bootstrap 0689b0e…:52
405 @ app.module.ts:40
__webpack_require__ @ bootstrap 0689b0e…:52
404 @ main.ts:12
__webpack_require__ @ bootstrap 0689b0e…:52
424 @ table.module.ts:12
__webpack_require__ @ bootstrap 0689b0e…:52
393 @ src async:7
__webpack_require__ @ bootstrap 0689b0e…:52
733 @ main.bundle.js:2545
__webpack_require__ @ bootstrap 0689b0e…:52
webpackJsonpCallback @ bootstrap 0689b0e…:23
(anonymous) @ main.bundle.js:1
bundle.js:19 Uncaught ReferenceError: ng is not defined
    at N (bundle.js:19)
    at VueComponent.ready (bundle.js:15)
    at VueComponent.LN.M._callHook (bundle.js:5)
    at VueComponent.z (bundle.js:5)
    at VueComponent.N (bundle.js:5)
    at VueComponent.M.$emit (bundle.js:5)
    at VueComponent.LN.M._callHook (bundle.js:5)
    at z (bundle.js:5)
    at VueComponent.M.$before (bundle.js:5)
    at CN.transition (bundle.js:6)
    at CN.mountComponent (bundle.js:6)
    at bundle.js:6
    at bundle.js:6
    at N (bundle.js:4)
    at ON.QN.M._resolveComponent (bundle.js:5)
N @ bundle.js:19
ready @ bundle.js:15
LN.M._callHook @ bundle.js:5
z @ bundle.js:5
N @ bundle.js:5
M.$emit @ bundle.js:5
LN.M._callHook @ bundle.js:5
z @ bundle.js:5
M.$before @ bundle.js:5
transition @ bundle.js:6
mountComponent @ bundle.js:6
(anonymous) @ bundle.js:6
(anonymous) @ bundle.js:6
N @ bundle.js:4
QN.M._resolveComponent @ bundle.js:5
resolveComponent @ bundle.js:6
setComponent @ bundle.js:6
bind @ bundle.js:6
CN._bind @ bundle.js:6
Gz @ bundle.js:4
(anonymous) @ bundle.js:4
M._compile @ bundle.js:5
M.$mount @ bundle.js:5
M._init @ bundle.js:4
Y.M._init @ bundle.js:19
ON @ bundle.js:5
(anonymous) @ bundle.js:3
zone.js:155 Uncaught TypeError: Cannot read property 'geAdapter' of undefined
    at WebSocket._ws.onopen (eval at M.exports (bundle.js:3), <anonymous>:97:46)
    at WebSocket.wrapFn [as _onopen] (zone.js:851)
    at ZoneDelegate.invokeTask (zone.js:262)
    at Zone.runTask (zone.js:151)
    at WebSocket.ZoneTask.invoke (zone.js:332)
_ws.onopen @ VM53541:97
wrapFn @ zone.js:851
ZoneDelegate.invokeTask @ zone.js:262
Zone.runTask @ zone.js:151
ZoneTask.invoke @ zone.js:332

Any help is appreciated. is an AngularJS(V1) App and you seem to be building Angular(V4 may be?) app. I don't think you can use <barcode-scanner> just like that.

scanning, I like to implement barcode scanning module in my angular 4 application. I am using ngx-barcode npm module to generate the barcodes which is working fine. Read Customer Reviews & Find Best Sellers. Free 2-Day Shipping w/Amazon Prime.

QuaggaJS is a barcode-scanner entirely written in JavaScript supporting real-time localization and decoding of various types of barcodes such as EAN, CODE 128, CODE 39, EAN 8, UPC-A, UPC-C, I2of5, 2of5, CODE 93 and CODABAR. The library is also capable of using getUserMedia to get direct access to the user's camera stream. Although the code relies on heavy image-processing even recent smartphones are capable of locating and decoding barcodes in real-time.

Using QuaggaJS, Angular example for barcode scanner

NPM Angular module for angular barcode scanner:

import { ChangeDetectorRef, Component, OnInit } from '@angular/core';
import Quagga from 'quagga';

  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
export class AppComponent implements OnInit {
  barcode = '';
  configQuagga = {
    inputStream: {
      name: 'Live',
      type: 'LiveStream',
      target: '#inputBarcode',
      constraints: {
        width: { min: 640 },
        height: { min: 480 },
        aspectRatio: { min: 1, max: 100 },
        facingMode: 'environment', // or user
      singleChannel: false // true: only the red color-channel is read
    locator: {
      patchSize: 'medium',
      halfSample: true
    locate: true,
    numOfWorkers: 4,
    decoder: {
      readers: ['code_128_reader']
  constructor(private ref: ChangeDetectorRef) { }

  ngOnInit() {
    console.log('Barcode: initialization');

  testChangeValues() {
    this.barcode = 'Code-barres bidon : 0123456789';

  startScanner() {
    this.barcode = '';

    Quagga.onProcessed((result) => this.onProcessed(result));

    Quagga.onDetected((result) => this.logCode(result));

    Quagga.init(this.configQuagga, (err) => {
      if (err) {
        return console.log(err);
      console.log('Barcode: initialization finished. Ready to start');


  private onProcessed(result: any) {
    const drawingCtx = Quagga.canvas.ctx.overlay;
    const drawingCanvas = Quagga.canvas.dom.overlay;

    if (result) {
      if (result.boxes) {
        drawingCtx.clearRect(0, 0, parseInt(drawingCanvas.getAttribute('width'), 10), parseInt(drawingCanvas.getAttribute('height'), 10));
        result.boxes.filter(function (box) {
          return box !==;
        }).forEach(function (box) {
          Quagga.ImageDebug.drawPath(box, { x: 0, y: 1 }, drawingCtx, { color: 'green', lineWidth: 2 });

      if ( {
        Quagga.ImageDebug.drawPath(, { x: 0, y: 1 }, drawingCtx, { color: '#00F', lineWidth: 2 });

      if (result.codeResult && result.codeResult.code) {
        Quagga.ImageDebug.drawPath(result.line, { x: 'x', y: 'y' }, drawingCtx, { color: 'red', lineWidth: 3 });

  private logCode(result) {
    const code = result.codeResult.code;
    if (this.barcode !== code) {
      this.barcode = 'Code-barres EAN : ' + code;

      // this.barcodeValue = result.codeResult.code;
      // this.barcodeResult=result.codeResult
      // console.log("this.barcodeValue",this.barcodeValue)

      // console.log("this.barcodeResult",this.barcodeResult.json())


#interactive.viewport {
    position: relative;
    width: 100%;
    height: auto;
    overflow: hidden;
    text-align: center;

#interactive.viewport>video {
    max-width: 100%;
    width: 100%;

canvas.drawingBuffer {
    position: absolute;
    left: 0;
    top: 0;
h1 {
    color: white;
    background-color: #ff6600;
    text-align: center;
    font-size: 20px;
    font-weight: bold;
    /* TODO style temporaire en attendant de migrer dans un autre composant */
    margin: auto !important;
    padding: 0px !important;
    height: 40px;
    line-height: 40px;
  <ngb-alert type="info" [dismissible]="false">
      <strong>Je scanne</strong> le code-barres pour voir les ODR.
<div *ngIf="barcode">
  <ngb-alert type="success" [dismissible]="false">
      {{ barcode }}

<button type="button" class="btn btn-warning" (click)="startScanner()">
  Démarrer le scan du code-barres

<div class="input-group">
  <div id="inputBarcode" style="position: static">
      <div id="interactive" class="viewport"></div>

Angular 7 barcode scanner, Implementing a barcode scanner in Angular 4. Angular 7. angular2-qrscanner. How to read a barcode using the built-in camera of a tablet  Implementing a barcode scanner in Angular 4. Ask Question Asked 2 years, 11 months ago. Active 23 days ago. Viewed 14k times -2. I am trying to

Chrome has released the Shape Detection API in their version 83 and this includes the Barcode Detector API. So if you are only focused on Chrome users, like in my case, I would suggest the ng-barcode-detector package.

ngx-barcode-scanner, I am trying to implement a barcode scanner using Angular 4, using this plugin - In my scanner.component.ts  This tutorial shows you how to create an example of Ionic 3, Angular 4 and Cordova Barcode and QR code Scanner using Ionic 3 Native Barcode Scanner.Actually, there is an Ionic 3 QR Scanner plugin, but we decide to use this Barcode plugin that can scan both Barcode and QR code.

Implementing a barcode scanner in Angular 4 - angular - html, Implementing a barcode scanner in Angular 4 - Stack Overflow. SALE. OFF. Save Teams. Q&A for Work. Stack Overflow for Teams is a private,  How to implement QR Code & BarCode scanning with IONIC Framework 4 (Code) 27/04/2019 13/05/2019 DivN0t3 0 Comments angular , ionic 3 , ionic 4 , native , typescript This tutorial shows you the way to make associate degree example of Ionic 4 , Angular 7 and Cordova Barcode and QR code Scanner using Ionic 4 Native Barcode Scanner.

Barcode Implementation In Angular - 05/2020, Angular (2+) QR code, Barcode, DataMatrix, scanner component using ZXing. - zxing-js/ngx-scanner. An angular barcode reader. Contribute to julienboulay/ngx-barcode-scanner development by creating an account on GitHub.

zxing-js/ngx-scanner: Angular (2+) QR code, Barcode , Implement Ionic 3 Barcode or QR code scanner; Test the Ionic 3 Barcode/  The openScanner function is called when we click on Scan Code Button. barcodeScanner.scan () method open's qrcode scanner in a new view and starts scanning for qrcode or barcode and when provided one its scans it and retrns response as text. In this example it barcodeData.text returns, since the qrcode contains it.

  • Yeah Angular V4... I'm struggling to find any V2 / V4 versions
  • Looks like that is for generating barcodes, I want to read them using a camera (iOS / Android) / webcam
  • Sorry, my bad. Should have read the description before suggesting.… may be something that might help if you're using NativeScript. If not, then probably you can refer to this and make your own Angular2 Component and may be open source it :) as an Angular2 Module.
  • The link to the github repo is dead. Do you have a new link?
  • This link is working