FastHTML

FastHTML is a python library which brings together Starlette, Uvicorn, HTMX, and fastcore's FT "FastTags" into a library for creating server-rendered hypermedia applications. The FastHTML class itself inherits from Starlette, and adds decorator-based routing with many additions, Beforeware, automatic FT to HTML rendering, and much more.

Things to remember when writing FastHTML apps:

• Although parts of its API are inspired by FastAPI, it is not compatible with FastAPI syntax and is not targeted at creating API services
• FastHTML includes support for Pico CSS and the fastlite sqlite library, although using both are optional; sqlalchemy can be used directly or via the fastsql library, and any CSS framework can be used. Support for the Surreal and css-scope-inline libraries are also included, but both are optional
• FastHTML is compatible with JS-native web components and any vanilla JS library, but not with React, Vue, or Svelte
• Use serve() for running uvicorn (if __name__ == "__main__" is not needed since it's automatic)
• When a title is needed with a response, use Titled; note that that already wraps children in Container, and already includes both the meta title as well as the H1 element.

Docs

• FastHTML concise guide: A brief overview of idiomatic FastHTML apps
• HTMX reference: Brief description of all HTMX attributes, CSS classes, headers, events, extensions, js lib methods, and config options
• Starlette quick guide: A quick overview of some Starlette features useful to FastHTML devs.

API

• API List: A succint list of all functions and methods in fasthtml.
• MonsterUI API List: Complete API Reference for Monster UI, a component framework similar to shadcn, but for FastHTML

Examples

• Websockets application: Very brief example of using websockets with HTMX and FastHTML
• Todo list application: Detailed walk-thru of a complete CRUD app in FastHTML showing idiomatic use of FastHTML and HTMX patterns.

Optional

• Surreal: Tiny jQuery alternative for plain Javascript with inline Locality of Behavior, providing me and any functions
• Starlette full documentation: A subset of the Starlette documentation useful for FastHTML development.
• JS App Walkthrough: An end-to-end walkthrough of a complete FastHTML app, including deployment to railway.
• FastHTML by Example: A collection of 4 FastHTML apps showcasing idiomatic use of FastHTML and HTMX patterns.
• Using Jupyter to write FastHTML: A guide to developing FastHTML apps inside Jupyter notebooks.
• FT Components: Explanation of the FT components, which are a way to write HTML in a Pythonic way.
• FAQ: Answers to common questions about FastHTML.
• MiniDataAPI Spec: Explanation of the MiniDataAPI specification, which allows us to use the same API for many different database engines.
• OAuth: Tutorial and explanation of how to use OAuth in FastHTML apps.
• Routes: Explanation of how routes work in FastHTML.
• WebSockets: Explanation of websockets and how they work in FastHTML.
• Custom Components: Explanation of how to create custom components in FastHTML.
• Handling Handlers: Explanation of how to request and response handlers work in FastHTML as routes.
• Live Reloading: Explanation of how to use live reloading for FastHTML development.