WebTeX

WebTeX is a modern, enhanced fork of LaTeX.js - a JavaScript LaTeX to HTML5 translator that converts LaTeX documents into web-ready HTML while preserving formatting and mathematical expressions.

🌟 Features

• 📝 Complete LaTeX Support: Comprehensive LaTeX document processing with high fidelity output
• 🧮 Advanced Mathematics: Full KaTeX integration for complex mathematical expressions
• 🎨 Authentic Styling: CSS that faithfully reproduces LaTeX typography and layout
• 🔧 Modern Tooling: Built with TypeScript, esbuild bundler, and modern development practices
• ⚡ High Performance: Optimized build system and efficient parsing
• 🌐 Web-First: Enhanced HTML generation with iframe support and complete document structure
• 🎯 Type Safety: Strict TypeScript implementation with comprehensive type definitions

🚀 Quick Start

Installation

CLI Usage (Global):

npm install -g webtex

Library Usage (Project):

npm install webtex

Basic Usage

Command Line:

# Convert LaTeX file to HTML
webtex input.tex -o output.html

# Include CSS and assets
webtex input.tex -o output.html -a

# Pretty print output
webtex input.tex -o output.html -p

JavaScript API:

import { HtmlGenerator, parse } from 'webtex';

const latex = `
\\documentclass{article}
\\begin{document}
\\section{Hello WebTeX}
This is a LaTeX document with math: $E = mc^2$
\\end{document}
`;

const generator = new HtmlGenerator({ hyphenate: false });
const doc = parse(latex, { generator }).htmlDocument();
console.log(doc.documentElement.outerHTML);

🎭 Live Preview App

🌐 Try WebTeX Online →

WebTeX includes a modern live preview application with real-time LaTeX compilation. You can use it online or run it locally:

Online Demo: Visit https://webtex.pages.dev/app for the live editor.

Local Development:

cd app
python3 -m http.server 8080
# Open http://localhost:8080 in your browser

Features:

• 🖥️ Iframe Rendering: Isolated preview with complete HTML structure
• 🔄 Real-time Compilation: Instant preview as you type
• 📝 Example Templates: Built-in article, math, and table examples
• 💾 Download Support: Export compiled HTML with assets
• 🎨 Modern UI: Clean, responsive interface with syntax highlighting

🔄 Migration from Original LaTeX.js

WebTeX is a comprehensive modernization of the original LaTeX.js project with significant architectural improvements:

🏗️ Build System Evolution

| Original LaTeX.js | WebTeX | |------------------|---------| | Rollup bundler | esbuild - Modern, fast build tool | | LiveScript source | TypeScript - Type-safe development | | Legacy tooling | Modern ecosystem (Biome, Vitest) |

📊 Mathematical Rendering

• KaTeX Integration: Fast, high-quality mathematical rendering with KaTeX
• Improved Math Packages: Better support for amsmath, amsfonts, amssymb
• Advanced Features: Support for bussproofs package for proof trees

🛡️ Type Safety & Quality

• Strict TypeScript: Comprehensive type definitions throughout codebase
• Modern Linting: Biome for fast, consistent code formatting
• Enhanced Testing: Vitest with visual regression testing via Playwright
• CI/CD: Automated testing and quality checks

🎨 Enhanced HTML Generation

• Complete Document Structure: Full HTML5 with proper DOCTYPE and head elements
• Iframe Support: Isolated rendering for better web integration
• Improved CSS: Enhanced styling with better cross-platform compatibility
• Asset Management: Streamlined font and stylesheet handling

⚡ Performance Improvements

• Faster Builds: esbuild's optimized bundling
• Better Dependencies: Updated to latest, secure package versions
• Reduced Bundle Size: Optimized output with tree shaking

📖 Documentation

CLI Options

Usage: webtex [options] [files...]

Options:
  -o, --output <file>      Specify output file (default: STDOUT)
  -a, --assets [dir]       Copy CSS to output directory
  -u, --url <url>          Set base URL for assets
  -b, --body               Output body content only (no HTML boilerplate)
  -e, --entities           Encode HTML entities instead of UTF-8
  -p, --pretty             Beautify HTML output
  -c, --class <class>      Default document class (default: "article")
  -m, --macros <file>      Load custom macro definitions
  -s, --stylesheet <css>   Additional stylesheets (comma-separated)
  -n, --hyphenation        Enable hyphenation (default: true)
  -l, --language <lang>    Hyphenation language (default: "en")
  -h, --help               Show help
  -v, --version            Show version

Supported LaTeX Features

Document Classes: article, book, report

Mathematics:

• Inline and display math environments
• AMS math extensions (amsmath, amsfonts, amssymb)
• Complex expressions, matrices, alignments
• Proof trees (bussproofs package)

Text Formatting:

• Font families, sizes, and styles
• Lists (itemize, enumerate, description)
• Tables and alignments
• Cross-references and labels

Advanced Features:

• Custom macro definitions
• Package system with extensibility
• Hyphenation support (English, German)
• Picture environment for diagrams

🏗️ Development

Prerequisites

• Node.js ≥ 22.0
• Node.js runtime and npm package manager

Development Setup

git clone https://github.com/tani/webtex.git
cd webtex
npm install
npm run build

Development Scripts

npm run build         # Full production build
npm run build:check   # Build only if dist/ doesn't exist  
npm run test:watch    # Development mode with tests
npm test              # Run all tests
npm run test:watch    # Run tests in watch mode
npm run lint          # Code linting and formatting
npm run typecheck     # TypeScript type checking

Testing

WebTeX includes comprehensive testing:

• Unit Tests: Core functionality and parsing
• Integration Tests: End-to-end document processing
• Visual Tests: Screenshot-based regression testing
• API Tests: Public interface validation

npm test test/unit/api.spec.ts        # API functionality tests
npm test test/visual/             # Visual regression tests  
npm test test/integration/        # Integration tests

🤝 Contributing

We welcome contributions! This project maintains the original LaTeX.js commitment to LaTeX compatibility while embracing modern development practices.

Guidelines:

• Follow TypeScript strict mode requirements
• Maintain comprehensive test coverage
• Use conventional commit messages
• Ensure all quality checks pass: npm run lint && npm run typecheck && npm test

📜 License & Attribution

WebTeX is licensed under the MIT License. See LICENSE for details.

Original Project Attribution

WebTeX is built upon the excellent foundation of LaTeX.js by Michael Brade. We extend our gratitude to the original author and contributors for creating such a robust LaTeX parsing and rendering system.

Original LaTeX.js:

• Copyright (c) 2015-2021 Michael Brade
• Repository: https://github.com/michael-brade/LaTeX.js
• License: MIT

WebTeX Enhancements:

• Copyright (c) 2024 tani
• Repository: https://github.com/tani/webtex
• License: MIT

Key Differences from Original

WebTeX represents a significant evolution while maintaining compatibility:

1. Language Migration: LiveScript → JavaScript → TypeScript
2. Build System: Rollup → esbuild with modern tooling
3. Mathematics: Enhanced KaTeX integration
4. Type Safety: Comprehensive TypeScript implementation
5. Testing: Modern test framework with visual regression
6. Web Integration: Enhanced HTML generation and iframe support

🌐 Ecosystem

Related Projects:

• LaTeX.js - Original project
• KaTeX - Mathematics rendering
• esbuild - Build tooling
• TypeScript - Type safety

⭐ Show Your Support

If WebTeX helps your project, please consider giving it a star on GitHub! Your support helps drive continued development and improvement.

Made with ❤️ by the WebTeX team