sumimakito/Awesome-qr.js
Awesome Qr.js
Awesome-qr.js is a JavaScript library designed for the generation and rendering of customizable QR codes. It provides a framework for encoding data into structured bit arrays while allowing for extensive visual styling, enabling the creation of branded graphics that remain compatible with standard scanning software.
The library distinguishes itself through its support for layered graphical composition, which allows users to integrate background images, animated GIFs, and center logos directly into the QR code structure. To maintain scan reliability, it employs automated image binarization, ensuring that embedded visuals maintain the necessary contrast against the data modules.
The project functions as a cross-platform tool, utilizing universal module definitions to ensure consistent execution across both browser-based and server-side environments. It leverages HTML5 canvas rendering to produce high-resolution graphics, which can be injected directly into web page elements for dynamic display. Users can further refine the output by configuring specific parameters such as error correction levels, dimensions, and mask patterns.
Features
- JavaScript QR Libraries - Provides a module for generating data-encoded QR patterns that functions consistently in both browser-based and server-side JavaScript environments.
- Data Encoders - Transforms input strings into structured bit arrays using standard error correction algorithms to ensure reliable data recovery during scanning.
- QR Code Generators - Creates highly customized QR codes with specific error correction levels, dimensions, and visual styling to encode data for various applications.
- Branded QR Codes - Integrates logos, background images, and animated GIFs into QR codes to enhance brand recognition while maintaining scan compatibility.
- QR Code Version Constrainers - Allows adjustment of version, mask pattern, and scaling of QR code components to ensure optimal readability and layout for specific scanning requirements.
- Cross-Platform Compatibility - Supports execution in both browser and server-side environments by utilizing standard module loading patterns to ensure consistent behavior across different platforms.
- Logo Overlays - Places a custom logo image at the center of a QR code with adjustable scaling, margins, and corner rounding to enhance brand recognition.
- Programmatic Canvas Drawing - Renders QR modules by programmatically drawing shapes and image data onto an HTML5 canvas element for high-performance graphical output.
- Image Binarizations - Converts background images into high-contrast monochrome bitmaps to ensure the underlying data modules remain readable by standard scanning software.
- Layered Compositing Stacks - Combines background imagery, data modules, and foreground logos into a single visual output by stacking graphical elements during the drawing process.
- Image Embedding - Integrates static images or animated GIFs into the background of a QR code to create branded visual designs that remain compatible with scanning software.
- QR Code Rendering - Provides a tool for drawing high-resolution QR code graphics directly onto HTML5 canvas elements for dynamic web display.
- DOM Element Renderers - Injects generated QR code graphics directly into specified elements within a web page to display dynamic information without requiring manual DOM manipulation.
- QR Code Encoders - Designs stylized QR codes that balance aesthetic branding requirements with the technical constraints needed for reliable scanning performance.
- Universal Module Definitions - Uses universal module definitions to maintain consistent execution logic across both browser-based DOM environments and server-side runtime platforms.
Star history
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