🚀 Advanced Markdown

A powerful, extensible Markdown parser with built-in support for math equations (KaTeX) and chemistry notation (mhchem). Perfect for scientific documents, technical documentation, and educational content.

✨ Try it Live - Experience advanced-markdown in action!

✨ Why Advanced Markdown?

Traditional Markdown parsers are great, but what if you need to write scientific papers, chemistry notes, or mathematical documentation? Advanced Markdown bridges that gap by seamlessly integrating:

🧮 Mathematical Equations - Render beautiful LaTeX math with KaTeX (inline $x^2$ and display $$equations$$)
🧪 Chemistry Notation - Write chemical formulas and reactions with mhchem ( $\ce{H2O}$ , $\ce{2H2 + O2 -> 2H2O}$ )
💻 Syntax Highlighting - Code blocks with 190+ languages via highlight.js
🎯 Smart Parsing - Code-first approach ensures dollar signs in code stay literal
📦 Zero Config - Works out of the box with sensible defaults
⚡ Blazing Fast - Parses 1000 lines in under 1 second
🔒 XSS Safe - Automatically escapes HTML in code blocks
🌍 Unicode Ready - Full support for international characters and emoji

🎓 Perfect For:

Scientific papers and research documents
Chemistry lab reports and reactions
Mathematical documentation and tutorials
Technical blogs with code examples
Educational content (Jupyter-style notebooks)
API documentation with examples

📦 Installation

npm install advanced-markdown

Or with yarn:

yarn add advanced-markdown

🚀 Quick Start

Basic Usage

import { parse } from 'advanced-markdown';

const markdown = `
# Hello World

This is **bold** and this is *italic*.

Math equation: $E = mc^2$

Chemistry: $\\ce{H2O}$
`;

const html = parse(markdown);
console.log(html);

With Options

const html = parse(markdown, {
  enableMath: true,        // Enable KaTeX math rendering (default: true)
  enableChemistry: true,   // Enable mhchem chemistry notation (default: true)
  enableHighlight: true,   // Enable syntax highlighting (default: true)
  enableTypography: true   // Enable smart quotes and dashes (default: true)
});

In React/Next.js

'use client'; // For Next.js 13+

import { parse } from 'advanced-markdown';

export default function MarkdownRenderer({ content }: { content: string }) {
  const html = parse(content);
  
  return (
    <div 
      className="markdown-content"
      dangerouslySetInnerHTML={{ __html: html }} 
    />
  );
}

🎨 Features & Examples

📝 Standard Markdown

All your favorite Markdown features work perfectly:

# Headers (H1-H6)
**Bold**, *Italic*, ***Both***, ~~Strikethrough~~

- Bullet lists
1. Numbered lists
- [x] Task lists

> Blockquotes with **formatting**

[Links](https://example.com) and ![Images](image.png)

| Tables | Are | Supported |
|--------|-----|-----------|
| Cell 1 | Cell 2 | Cell 3 |

---

Horizontal rules and `inline code`

🧮 Mathematical Equations

Inline Math

Write inline equations with single dollar signs:

Einstein's equation: $E = mc^2$

Quadratic formula: $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

Greek letters: $\alpha, \beta, \gamma, \Delta, \Omega$

Renders as: Einstein's equation: E = mc², Quadratic formula with proper formatting, etc.

Display Math

Use double dollar signs for centered display equations:

$$\int_{-\infty}^{\infty} e^{-x^2} dx = \sqrt{\pi}$$

$$\sum_{n=1}^{\infty} \frac{1}{n^2} = \frac{\pi^2}{6}$$

$$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$

Supports:

Integrals, summations, products
Fractions, roots, exponents
Matrices and arrays
Greek letters and symbols
All standard LaTeX math commands

🧪 Chemistry Notation

Write chemical formulas and reactions beautifully:

Simple Molecules

Water: $\ce{H2O}$
Carbon dioxide: $\ce{CO2}$
Sulfuric acid: $\ce{H2SO4}$

Chemical Reactions

Combustion: $\ce{CH4 + 2O2 -> CO2 + 2H2O}$

Equilibrium: $\ce{N2(g) + 3H2(g) <=> 2NH3(g)}$

Precipitation: $\ce{AgNO3(aq) + NaCl(aq) -> AgCl(s) v + NaNO3(aq)}$

Features:

Automatic subscripts (H₂O)
Reaction arrows (→, ⇌, ↔)
States of matter: (s), (l), (g), (aq)
Charges and oxidation states
Complex ions and coordination compounds

💻 Code Blocks with Syntax Highlighting

Support for 190+ languages:

```javascript
// JavaScript with syntax highlighting
function fibonacci(n) {
  if (n <= 1) return n;
  return fibonacci(n - 1) + fibonacci(n - 2);
}
```

```python
# Python example
def calculate_energy(mass):
    c = 299792458  # Speed of light
    return mass * c ** 2
```

```sql
SELECT compound, formula, molar_mass
FROM chemicals
WHERE state = 'liquid';
```

Languages supported: JavaScript, Python, TypeScript, Java, C++, Rust, Go, SQL, HTML, CSS, Bash, and 180+ more!

🛡️ Code Protection

Smart parsing ensures dollar signs in code stay literal:

```javascript
const price = "$100.50";        // Stays literal
const formula = "$E = mc^2$";   // Not rendered as math
const chem = "$\ce{H2O}$";      // Not rendered as chemistry
```

Inline code also protected: $x^2$ stays as literal text.

📚 API Reference

`parse(markdown: string, options?: ParseOptions): string`

Parses markdown text and returns HTML string.

Parameters

markdown (string, required) - The markdown text to parse
options (ParseOptions, optional) - Configuration options

ParseOptions

interface ParseOptions {
  enableMath?: boolean;        // Enable KaTeX math rendering (default: true)
  enableChemistry?: boolean;   // Enable mhchem chemistry notation (default: true)
  enableHighlight?: boolean;   // Enable code syntax highlighting (default: true)
  enableTypography?: boolean;  // Enable smart quotes and dashes (default: true)
}

Returns

Returns an HTML string that can be safely inserted into the DOM.

Example

import { parse } from 'advanced-markdown';

const html = parse('# Hello $E=mc^2$', {
  enableMath: true,
  enableChemistry: true,
  enableHighlight: true
});

// Returns: '<h1 id="hello-emc2">Hello <span class="math-inline">...</span></h1>'

🎯 Real-World Examples

Scientific Paper

# Thermodynamics Study

## Gibbs Free Energy

The Gibbs free energy is defined as:
$$\Delta G = \Delta H - T\Delta S$$

Where $\Delta H$ is enthalpy change, $T$ is temperature, and $\Delta S$ is entropy change.

## Experimental Procedure

```python
def calculate_gibbs(delta_h, temp, delta_s):
    """Calculate Gibbs free energy
    
    Args:
        delta_h: Enthalpy change (J/mol)
        temp: Temperature (K)
        delta_s: Entropy change (J/mol·K)
    
    Returns:
        Gibbs free energy (J/mol)
    """
    return delta_h - temp * delta_s

Results

The reaction $\ce{2H2(g) + O2(g) -> 2H2O(l)}$ has:

$\Delta H = -286,\text{kJ/mol}$
$\Delta S = -163,\text{J/mol·K}$


### Chemistry Lab Report

```markdown
# Acid-Base Titration

## Reaction
$$\ce{HCl(aq) + NaOH(aq) -> NaCl(aq) + H2O(l)}$$

## Data

| Trial | Volume HCl | Volume NaOH | Molarity |
|-------|-----------|-------------|----------|
| 1     | 25.0 mL   | 24.8 mL     | $0.992\,M$ |
| 2     | 25.0 mL   | 25.2 mL     | $1.008\,M$ |

## Conclusion

The balanced equation shows a **1:1 molar ratio** between $\ce{HCl}$ and $\ce{NaOH}$.

🎨 Styling Your Content

Advanced Markdown generates semantic HTML with CSS classes for easy styling:

/* Math equations */
.math-inline { /* Inline math like $x^2$ */ }
.math-display { /* Display math like $$equations$$ */ }
.math-error { /* Math rendering errors */ }

/* Code blocks */
.code-header { /* Language label */ }
.code-language { /* Language name */ }
pre code { /* Code content */ }

/* Standard elements */
h1, h2, h3 { /* Headers */ }
table { /* Tables */ }
blockquote { /* Quotes */ }

Recommended CSS frameworks:

KaTeX CSS (required for math)
Highlight.js themes (for code highlighting)
Tailwind Typography, GitHub Markdown CSS, or your custom styles

⚡ Performance

Advanced Markdown is optimized for speed:

✅ Parses 1000 lines in ~600ms
✅ Handles large documents (10,000+ lines) without lag
✅ Efficient regex-based parsing
✅ Minimal bundle size (~15KB for ESM)

Benchmark:

Document Size    Parse Time
100 lines        ~60ms
1,000 lines      ~600ms
10,000 lines     ~6s

🔒 Security

Advanced Markdown takes security seriously:

✅ XSS Protection - HTML in code blocks is automatically escaped
✅ Safe Rendering - No eval() or Function() usage
✅ Input Sanitization - Malicious scripts are neutralized
✅ No Remote Code Execution - All processing is local

Example:

```html
<script>alert('XSS')</script>


Renders safely as escaped HTML: `&lt;script&gt;alert('XSS')&lt;/script&gt;`

---

## 🌍 Browser & Node.js Support

### Browser Support
- ✅ Chrome/Edge 90+
- ✅ Firefox 88+
- ✅ Safari 14+
- ✅ All modern browsers with ES2020 support

### Node.js Support
- ✅ Node.js 14+
- ✅ CommonJS and ES Modules
- ✅ TypeScript with full type definitions

---

## 📖 Documentation & Resources

- 📘 **[Live Demo](https://www.markdowntopdf.tech)** - Try it in your browser
- 📗 **[API Reference](#api-reference)** - Complete API documentation
- 📕 **[Examples](#real-world-examples)** - Real-world usage examples
- 📙 **[GitHub Repository](https://github.com/themrsami/markdowntopdf)** - Source code

---

## 🤝 Contributing

We welcome contributions! Here's how you can help:

1. **Report Bugs** - Open an issue on GitHub
2. **Suggest Features** - Share your ideas
3. **Submit PRs** - Fix bugs or add features
4. **Improve Docs** - Help make documentation better

### Development Setup

```bash
# Clone the repository
git clone https://github.com/themrsami/markdowntopdf.git
cd markdowntopdf/advanced-markdown

# Install dependencies
npm install

# Build the package
npm run build

# Run tests
npm test

📄 License

🙏 Acknowledgments

Advanced Markdown is built on top of these amazing projects:

KaTeX - Fast math rendering
mhchem - Chemistry notation for KaTeX
highlight.js - Syntax highlighting

⭐ Star Us!

If you find Advanced Markdown useful, please consider giving it a star on GitHub! ⭐

🔗 Related Projects

MarkdownToPDF.tech - Convert Markdown to beautiful PDFs online (powered by advanced-markdown!)
Create your own amazing projects with advanced-markdown!

Made with ❤️ by Usama Nazir

npm • GitHub • Website

Name		Name	Last commit message	Last commit date
Latest commit History 7 Commits
src		src
.gitignore		.gitignore
.npmignore		.npmignore
CHANGELOG.md		CHANGELOG.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
README.md		README.md
SETUP.md		SETUP.md
jest.config.js		jest.config.js
package-lock.json		package-lock.json
package.json		package.json
tsconfig.json		tsconfig.json

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themrsami/advanced-markdown

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