Pros of html5-qrcode

• Simpler API and easier integration for web applications
• Built-in camera selection and file input handling
• Supports scanning from image files directly

Cons of html5-qrcode

• Limited to QR code scanning, while library supports multiple barcode formats
• Less extensive documentation and community support
• Fewer configuration options for advanced use cases

Code Comparison

html5-qrcode:

const html5QrCode = new Html5Qrcode("reader");
html5QrCode.start(
  { facingMode: "environment" },
  { fps: 10, qrbox: 250 },
  qrCodeSuccessCallback,
  qrCodeErrorCallback
);

library:

const codeReader = new ZXing.BrowserQRCodeReader();
codeReader
  .decodeFromVideoDevice(undefined, 'video', (result, err) => {
    if (result) console.log(result.text);
    if (err) console.error(err);
  })
  .catch(err => console.error(err));

Both libraries offer QR code scanning capabilities for web applications, but html5-qrcode focuses on simplicity and ease of use, while library provides more extensive features and format support. html5-qrcode is better suited for quick implementation of QR code scanning in web apps, whereas library offers more flexibility and options for complex barcode scanning requirements.

Pros of jsQR

• Lightweight and focused solely on QR code scanning
• Pure JavaScript implementation, no dependencies
• Faster performance for QR code detection and decoding

Cons of jsQR

• Limited to QR codes only, unlike library which supports multiple barcode formats
• Less actively maintained, with fewer recent updates
• Smaller community and fewer contributors

Code Comparison

jsQR:

const code = jsQR(imageData.data, imageData.width, imageData.height);
if (code) {
  console.log("Found QR code", code.data);
}

library:

const codeReader = new ZXing.BrowserQRCodeReader();
codeReader.decodeFromImage(imgElement).then((result) => {
  console.log(result.text);
}).catch(err => console.error(err));

Summary

jsQR is a lightweight, specialized library for QR code scanning, offering fast performance and no dependencies. However, it lacks support for other barcode formats and has a smaller community compared to library. library provides a more comprehensive solution with support for multiple barcode formats but may be overkill for projects only requiring QR code functionality. The choice between the two depends on the specific project requirements and the need for additional barcode format support.

Pros of jsqrcode

• Lightweight and focused solely on QR code scanning
• Simple implementation with minimal dependencies
• Easier to integrate into existing projects due to its simplicity

Cons of jsqrcode

• Less actively maintained compared to library
• Limited features and support for different barcode types
• May have lower performance and accuracy in certain scenarios

Code Comparison

jsqrcode:

qrcode.callback = function(result) {
    console.log(result);
};
qrcode.decode(imageData);

library:

import { BrowserQRCodeReader } from '@zxing/library';

const codeReader = new BrowserQRCodeReader();
codeReader.decodeFromImage(imageElement)
    .then(result => console.log(result.text))
    .catch(err => console.error(err));

Summary

jsqrcode is a simpler, more focused library for QR code scanning, making it easier to integrate into existing projects. However, library offers more features, better maintenance, and support for various barcode types. library also provides a more modern API with promise-based operations, while jsqrcode uses a callback approach. The choice between the two depends on project requirements, desired features, and long-term maintenance needs.

Pros of qr-scanner

• Lightweight and focused specifically on QR code scanning
• Utilizes Web Workers for improved performance
• Simpler API and easier integration for basic QR code scanning tasks

Cons of qr-scanner

• Limited to QR codes only, unlike library which supports multiple barcode formats
• Less extensive documentation and community support
• Fewer advanced features and customization options

Code Comparison

qr-scanner:

import QrScanner from 'qr-scanner';

const qrScanner = new QrScanner(videoElem, result => console.log('decoded qr code:', result));
qrScanner.start();

library:

import { BrowserQRCodeReader } from '@zxing/library';

const codeReader = new BrowserQRCodeReader();
codeReader.decodeFromVideoDevice(undefined, 'video', (result, err) => {
  if (result) console.log(result.getText());
  if (err) console.error(err);
});

Both libraries offer straightforward ways to initialize and use QR code scanning functionality. qr-scanner provides a more concise API for basic QR code scanning, while library offers more flexibility and options for handling different barcode formats and advanced use cases.

Pros of qrcodejs

• Lightweight and simple to use, with minimal dependencies
• Focuses solely on QR code generation, making it ideal for basic use cases
• Supports various output formats, including canvas, table, and SVG

Cons of qrcodejs

• Limited functionality compared to library, as it only generates QR codes
• Less actively maintained, with fewer recent updates and contributions
• Lacks advanced features like error correction level adjustment

Code Comparison

qrcodejs:

var qrcode = new QRCode("qrcode", {
    text: "http://example.com",
    width: 128,
    height: 128,
    colorDark : "#000000",
    colorLight : "#ffffff",
    correctLevel : QRCode.CorrectLevel.H
});

library:

import { BrowserQRCodeReader } from '@zxing/library';

const codeReader = new BrowserQRCodeReader();
codeReader.decodeFromInputVideoDevice(undefined, 'video')
    .then(result => console.log(result.text))
    .catch(err => console.error(err));

The code examples demonstrate the primary focus of each library: qrcodejs for generating QR codes and library for reading/decoding QR codes. library offers more comprehensive functionality for both encoding and decoding various barcode formats, while qrcodejs is specialized in QR code generation.

Pros of qrcode-generator

• Lightweight and simple to use
• Supports multiple output formats (Canvas, SVG, Table)
• Pure JavaScript implementation, no dependencies

Cons of qrcode-generator

• Limited to QR code generation only
• Less actively maintained compared to library
• Fewer features and customization options

Code Comparison

qrcode-generator:

var qr = qrcode(4, 'L');
qr.addData('Hello, World!');
qr.make();
var imgTag = qr.createImgTag(4);

library:

import { QRCodeWriter, BarcodeFormat } from '@zxing/library';

const writer = new QRCodeWriter();
const matrix = writer.encode('Hello, World!', BarcodeFormat.QR_CODE, 300, 300);

Summary

qrcode-generator is a lightweight, easy-to-use library focused solely on QR code generation. It offers multiple output formats and is dependency-free. However, it has limited features and is less actively maintained compared to library.

library, on the other hand, is a more comprehensive barcode library that supports both encoding and decoding of various barcode formats, including QR codes. It offers more features and customization options but may be overkill for simple QR code generation tasks.

Choose qrcode-generator for quick and simple QR code generation, while library is better suited for more complex barcode-related tasks and projects requiring broader functionality.