@qr-platform/qr-code.js

QRCode.js - Simple, Beautiful, Reliable

Create Beautiful, Reliable QR Codes with Ease

QRCode.js is a professional JavaScript/TypeScript library for creating customized QR codes, offering a blend of simplicity and sophistication. With versatile styling options—dot shapes, colors, gradients, embedded images, borders, and text—it enables you to design unique, visually appealing QR codes that work flawlessly with standard scanners. QRCode.js is part of QR-Platform: All-in-One QR Codes Management Solution.

✨ Features

• Core QR Code Generation: Encode any text, URL, or data.
• Highly Customizable: Control dot shapes, colors, sizes, corner styles, and background.
• Gradients: Apply linear or radial gradients to dots, corners, and backgrounds.
• Image Embedding: Embed logos or other images in the center, as an overlay, or as a background. Control image precedence with global QRCodeJs.setImage() or builder useImage(), both supporting an override option.
• Borders (Free & Premium): Add basic borders (with branding in free version) or advanced, customizable borders with text/images (Premium). Control text precedence with QRCodeJs.setText() or builder useText(), both supporting an override option.
• Flexible Border Configuration: Set global border defaults (setBorder/setBorderId) or use the builder pattern (useBorder/useBorderId) for instance-specific borders.
• Templates & Styles: Use predefined templates and styles, or create your own for consistent branding. Apply them globally with QRCodeJs.setTemplate() / QRCodeJs.setStyle() or per-instance with the builder's useTemplate() / useStyle().
• Comprehensive Configuration:
  • Use QRCodeJs.setData(), QRCodeJs.setOptions(), and QRCodeJs.setSettings() for powerful global default configurations, with override options for strong precedence.
  • Employ the builder pattern's useData(), useOptions(), and useSettings() for instance-specific comprehensive setups, also with override capabilities. useSettings() resets prior builder steps to establish a new baseline.
• Flexible Output: Generate QR codes as SVG elements in the browser or SVG strings in Node.js.
• Download Options: Download QR codes as SVG, PNG, JPEG, or WEBP.
• TypeScript Support: Fully typed for a better development experience.
• Node.js Compatible: Works seamlessly in server-side environments.
• Responsive: Option to make SVG output responsive to container size.
• Scan Validation (Premium): Verify the scannability of generated QR codes.

🚀 Installation

NPM ⤵️

npm install @qr-platform/qr-code.js

YARN ⤵️

yarn add @qr-platform/qr-code.js

PNPM ⤵️

pnpm add @qr-platform/qr-code.js

💡 Basic Usage

import { QRCodeJs } from '@qr-platform/qr-code.js';

const qrCode = new QRCodeJs({ data: 'https://example.com' });
qrCode.append(document.getElementById('qr-container'));

or

import { QRCodeJs, Options } from '@qr-platform/qr-code.js';

// 1. Define options (only 'data' is required)
const options: Options = {
  data: 'https://example.com',
  dotsOptions: {
    color: '#007bff', // Blue dots
    type: 'rounded'   // Use rounded dots
  },
  backgroundOptions: {
    color: '#ffffff' // White background
  }
};

// 2. Create QR Code instance
const qrCode = new QRCodeJs(options);

// 3. Append to a container element (in browser)
const container = document.getElementById('qr-container');
if (container) {
  qrCode.append(container);
}

// Or get SVG string (Browser or Node.js)
qrCode.serialize().then(svgString => {
  if (svgString) {
    console.log('QR Code SVG:', svgString);
    // In Node.js, you might save this string to a file
    // require('fs').writeFileSync('qrcode.svg', svgString);
  }
});

⚙️ Key Options Overview

Option	Description	Example Value
data	Required. The content to encode.	'Your URL here'
shape	Overall shape ('square' or 'circle').	'circle'
margin	Quiet zone around the QR code (pixels).	10
qrOptions.errorCorrectionLevel	Error correction ('L', 'M', 'Q', 'H').	'H'
dotsOptions.type	Shape of the data dots (e.g., rounded, dot).	'rounded'
dotsOptions.color	Color of the data dots.	'#ff5733'
dotsOptions.gradient	Gradient for dots (see Gradients).	{ type: 'linear', ... }
cornersSquareOptions	Style for the large corner squares.	{ type: 'dot', color: '#00ff00' }
cornersDotOptions	Style for the small dots inside corners.	{ type: 'square', color: '#ffffff' }
backgroundOptions	Background style (color, roundness, gradient).	{ color: '#f0f0f0', round: 0.2 }
image	URL/Buffer/Blob of image to embed.	'logo.png'
imageOptions	Options for the embedded image (size, margin).	{ imageSize: 0.3, margin: 2 }
borderOptions	Premium. Options for decorative borders.	{ hasBorder: true, thickness: 20, ... }
SettingsOptions	Comprehensive object for setSettings/useSettings.	{ templateId: '...', data: '...', ...}

For a full list of options and detailed explanations of SettingsOptions, setData, setOptions, and their builder counterparts, see the API Reference Guide and Usage Guide.

🎨 Examples

Explore various configurations:

• Basic Examples Get started with common use cases.

• Advanced Examples Dive deep into customization possibilities.

🖥️ Node.js Usage

QRCode.js works in Node.js for server-side generation.

import { QRCodeJs, Options } from '@qr-platform/qr-code.js/node'; // Note the '/node' import
import fs from 'fs';

const options: Options = {
  data: 'https://example.com/from-node',
  dotsOptions: {
    color: '#8A2BE2' // BlueViolet
  }
};

const qrCode = new QRCodeJs(options);

qrCode.serialize().then(svgString => {
  if (svgString) {
    fs.writeFileSync('qrcode-node.svg', svgString);
    console.log('QR Code saved to qrcode-node.svg');
  }
});

Key Differences:

• Import from @qr-platform/qr-code.js/node.

• Methods requiring a DOM like append() or download() are not available. Use serialize() to get the SVG string.

• License activation (if needed) persists only in memory per session. See License Management for details.

• Peer Dependencies: You must install the required peerDependencies for Node.js functionality.

  Install automatically using npx:

  npx i-peers

  Install manually using npm:

   npm i @xmldom/xmldom @undecaf/zbar-wasm image-size jose jimp @resvg/resvg-js file-type

🔑 License Management (Free vs. Premium)

QRCode.js offers both free and premium features.

• Free Version:

  • All core generation and styling features (dots, corners, background, gradients, image embedding).
  • Basic border styling (borderOptions.hasBorder, thickness, color, radius).
  • Limitation: Borders created in the free version will automatically display "QR-Platform" branding text in the bottom border. This cannot be removed or customized without a license.

• Premium Version (Requires License):

  • Advanced Borders: No branding, custom text/images on any side, inner/outer borders, full styling control.
  • Scan Validation: Access to the validateScanning() method.

Activating a License:

// Activate BEFORE creating QRCodeJs instances
// Using a license key (fetches token from backend)
await QRCodeJs.license('YOUR-LICENSE-KEY');

// Or using a pre-fetched JWT token
await QRCodeJs.token('YOUR-JWT-TOKEN');

// Check license status
const licenseDetails = QRCodeJs.getLicenseDetails();
if (licenseDetails) {
  console.log('License active. Plan:', licenseDetails.plan);
}

// Now create instances with premium features enabled
const qrPremium = new QRCodeJs({
  data: 'Premium QR Code',
  borderOptions: {
    hasBorder: true,
    thickness: 30,
    decorations: {
      bottom: { enableText: true, value: 'My Custom Text' } // No branding!
    }
  }
});

For full details on activation, persistence, configuration, and backend implementation, see the License Management Guide.

📚 Documentation

• Full Documentation: The main guide covering all features, options, and concepts.
• API Reference: Detailed reference for all classes, methods, and types.
• Usage Guide: Practical examples and explanations for common use cases.
• Basic Examples: Simple examples to get started quickly.
• Advanced Examples: Demonstrations of complex configurations and feature combinations, including setSettings and useSettings.
• License Management: Information on activating and managing premium features.

📜 License

This Software is licensed, not sold, by QR-Platform ("Licensor") for use only under the terms of this license. The source code for the Software is proprietary, confidential, and is not provided or licensed under this agreement. Licensor reserves all rights not expressly granted to User - see the LICENSE file for details. Premium features require a separate commercial license from QR-Platform.