• 🐍 Python-First - Write reactive UIs using Python syntax with type safety and IDE support
• 🔄 Reactive Signals - Hypermedia approach with data attribute powered client-side reactivity where needed
• 📡 Server-Sent Events - Built-in SSE support for real-time server interactions
• 🎨 Framework Agnostic - Works with any CSS framework (Tailwind, DaisyUI)
• 🛠️ JavaScript Escape Hatch - Drop into raw JavaScript when needed for complex interactions
• 🎯 Type Safety - Full IDE support with autocomplete and error detection

pip install starhtml

from starhtml import *

app, rt = star_app()

@rt('/')
def home():
    return Div(
        H1("StarHTML Demo"),
        
        # Define reactive state with signals
        Div(
            (counter := Signal("counter", 0)),  # Python-first signal definition
            
            # Reactive UI that updates automatically
            P("Count: ", Span(data_text=counter)),
            Button("+", data_on_click=counter.add(1)),
            Button("Reset", data_on_click=counter.set(0)),
            
            # Conditional styling
            data_class_active=counter > 0
        ),
        
        # Server-side interactions
        Button("Load Data", data_on_click=get("/api/data")),
        Div(id="content")
    )

@rt('/api/data')
def api_data():
    return Div("Data loaded from server!", id="content")

serve()

Run with python app.py and visit http://localhost:5001.

git clone https://github.com/banditburai/starhtml.git
cd starhtml
uv sync  # or pip install -e ".[dev]"
pytest && ruff check .

We welcome contributions! Please see our Contributing Guide for details.

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

• 💬 Discussions: GitHub Discussions - Ask questions, share ideas
• 🐛 Issues: GitHub Issues - Report bugs, request features
• 📚 Documentation: API Reference
• 💡 Examples: Check out the /examples directory for more complex use cases

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

StarHTML is a respectful fork of FastHTML. We're grateful to the FastHTML team for the excellent foundation.

• FastHTML - The original framework that inspired StarHTML
• Datastar - The reactive JavaScript library powering client-side interactions
• Contributors - Thank you to everyone who has contributed to making StarHTML better