Futuristic retail store with customer scanning QR code using smartphone

Scanning Made Simple: Unleash the Power of react-barcode-qrcode-scanner in Your React Apps

The Orange Cat
The Orange Cat

The react-barcode-qrcode-scanner library is a powerful tool for React developers looking to incorporate barcode and QR code scanning functionality into their applications. By leveraging the capabilities of react-vision-camera for camera access and Dynamsoft Barcode Reader for decoding, this library provides a seamless solution for various scanning scenarios.

Key Features

react-barcode-qrcode-scanner offers a range of features that make it an attractive choice for developers:

  • Easy integration with React applications
  • Support for both barcode and QR code scanning
  • Customizable camera settings
  • Real-time scanning and result handling
  • Overlay drawing for visual feedback
  • Flexible runtime settings for optimized scanning

Getting Started

Setting Up Your Project

To begin using the react-barcode-qrcode-scanner in your React application, you’ll need to install it via npm. Open your terminal and run the following command:

npm install react-barcode-qrcode-scanner

For those who prefer using Yarn, the installation command is:

yarn add react-barcode-qrcode-scanner

Basic Implementation

Let’s dive into a simple example of how to use the react-barcode-qrcode-scanner component in your React application.

import React, { useState } from 'react';
import { BarcodeScanner } from 'react-barcode-qrcode-scanner';
import { TextResult } from 'dynamsoft-javascript-barcode';

const ScannerComponent: React.FC = () => {
  const [results, setResults] = useState<TextResult[]>([]);

  const handleScanned = (scannedResults: TextResult[]) => {
    setResults(scannedResults);
    console.log('Scanned results:', scannedResults);
  };

  return (
    <div>
      <h2>Barcode Scanner</h2>
      <BarcodeScanner
        isActive={true}
        license="YOUR_DYNAMSOFT_LICENSE_KEY"
        onScanned={handleScanned}
      />
      <div>
        <h3>Scanned Results:</h3>
        <ul>
          {results.map((result, index) => (
            <li key={index}>{result.barcodeText}</li>
          ))}
        </ul>
      </div>
    </div>
  );
};

export default ScannerComponent;

In this basic example, we’ve created a simple component that renders the BarcodeScanner and displays the scanned results. The isActive prop is set to true to start the scanner immediately, and we’ve provided a placeholder for the Dynamsoft license key.

Advanced Usage

Customizing Scanner Behavior

The react-barcode-qrcode-scanner library offers various props to customize the scanner’s behavior. Let’s explore some advanced usage scenarios.

Controlling Camera Selection

You can specify which camera to use by utilizing the desiredCamera and facingMode props:

import React from 'react';
import { BarcodeScanner } from 'react-barcode-qrcode-scanner';

const AdvancedScannerComponent: React.FC = () => {
  return (
    <BarcodeScanner
      isActive={true}
      license="YOUR_DYNAMSOFT_LICENSE_KEY"
      desiredCamera="back"
      facingMode="environment"
      desiredResolution={{ width: 1280, height: 720 }}
      onScanned={(results) => console.log(results)}
    />
  );
};

export default AdvancedScannerComponent;

This configuration attempts to use the back camera with a resolution of 1280x720. The facingMode prop takes precedence over desiredCamera when supported.

Customizing Runtime Settings

To optimize the scanner for specific barcode types or scanning scenarios, you can adjust the runtime settings:

import React, { useState } from 'react';
import { BarcodeScanner } from 'react-barcode-qrcode-scanner';

const OptimizedScannerComponent: React.FC = () => {
  const [runtimeSettings] = useState(JSON.stringify({
    ImageParameter: {
      BarcodeFormatIds: ["BF_QR_CODE"],
      Description: "",
      Name: "QR Code Only"
    },
    Version: "3.0"
  }));

  return (
    <BarcodeScanner
      isActive={true}
      license="YOUR_DYNAMSOFT_LICENSE_KEY"
      runtimeSettings={runtimeSettings}
      onScanned={(results) => console.log(results)}
    />
  );
};

export default OptimizedScannerComponent;

This example configures the scanner to only detect QR codes, which can improve performance in scenarios where other barcode types are not needed.

Handling Scanner Events

The react-barcode-qrcode-scanner provides several event handlers to give you fine-grained control over the scanning process:

import React from 'react';
import { BarcodeScanner } from 'react-barcode-qrcode-scanner';
import { TextResult } from 'dynamsoft-javascript-barcode';

const EventHandlingComponent: React.FC = () => {
  const handleOpened = (cam: HTMLVideoElement, camLabel: string) => {
    console.log(`Camera opened: ${camLabel}`);
  };

  const handleClosed = () => {
    console.log('Camera closed');
  };

  const handleDeviceListLoaded = (devices: MediaDeviceInfo[]) => {
    console.log('Available devices:', devices);
  };

  const handleScanned = (results: TextResult[]) => {
    console.log('Scanned results:', results);
  };

  const handleClicked = (result: TextResult) => {
    alert(`Clicked barcode: ${result.barcodeText}`);
  };

  const handleInitialized = () => {
    console.log('Barcode Reader initialized');
  };

  return (
    <BarcodeScanner
      isActive={true}
      license="YOUR_DYNAMSOFT_LICENSE_KEY"
      drawOverlay={true}
      onOpened={handleOpened}
      onClosed={handleClosed}
      onDeviceListLoaded={handleDeviceListLoaded}
      onScanned={handleScanned}
      onClicked={handleClicked}
      onInitialized={handleInitialized}
    />
  );
};

export default EventHandlingComponent;

This comprehensive example demonstrates how to use various event handlers to respond to different stages of the scanning process, from initialization to result handling.

Conclusion

The react-barcode-qrcode-scanner library offers a robust and flexible solution for integrating barcode and QR code scanning capabilities into React applications. With its easy-to-use API, customizable settings, and comprehensive event handling, developers can quickly implement scanning functionality tailored to their specific needs.

Whether you’re building a simple QR code reader or a complex inventory management system, this library provides the tools necessary to create efficient and user-friendly scanning experiences. By following the examples and guidelines provided in this article, you’ll be well-equipped to harness the full power of react-barcode-qrcode-scanner in your next React project.

Comments