FastHTML is a modern framework for building web applications with Python. It combines Python's simplicity with the power of HTMX to create dynamic interfaces without writing JavaScript.

Why FastHTML

  • Simplicity: Write components as Python functions
  • Performance: Server-side rendering, no heavy JavaScript
  • Productivity: Fast development with hot reload

Basic Example

from fasthtml.common import *

app, rt = fast_app()

@rt('/')
def get():
    return Div(
        H1('Hello World!'),
        P('Welcome to FastHTML')
    )

serve()

Reusable Components

In FastHTML, components are simply functions:

def Card(title, content):
    return Div(
        H3(title),
        P(content),
        cls='card'
    )

# Usage
Card('My Title', 'Card content')

HTMX Integration

FastHTML integrates natively with HTMX for partial updates:

@rt('/counter')
def get():
    return Div(
        Span('0', id='count'),
        Button(
            'Increment',
            hx_post='/increment',
            hx_target='#count'
        )
    )

Conclusion

FastHTML is an excellent choice for Python developers who want to create modern web applications without the complexity of JavaScript frameworks.