reflex-dev

Reflex enables full-stack Python web development by compiling Python code to a React frontend and FastAPI backend automatically. Define state, event handlers, and UI components in Python, and Reflex generates the REST API and frontend without writing JavaScript. This approach lets you manage the entire application—state mutations, routing, and UI logic—in a single language.

Yes. Reflex abstracts React and FastAPI away. Write state management and event handlers as Python classes, define UI with component functions, and Reflex compiles everything to a production-ready stack. You work entirely in Python; the framework handles serialization, WebSocket communication, and code generation.

Define app state as a JSON-serializable Python class with @rx.State. Mutations occur only through event handler methods that process user actions like form submissions. Use @rx.var for derived state. Bind form inputs to state fields and call event handlers on submission; Reflex manages state synchronization and real-time updates via WebSockets.

Install Reflex and Python. Familiarity with Python syntax, basic web concepts (routing, state), and component-driven UI patterns helps. No prior React or FastAPI experience is required; Reflex handles framework details. A standard project structure with state, pages, and components directories is recommended.

Yes. Event handlers make HTTP requests to external APIs or query databases directly. State stores the results as JSON-serializable data. Common patterns include fetching data on page load, submitting forms to backend services, and displaying results in data tables or custom components.

Yes. Reflex provides built-in routing for multi-page apps, CSS-in-Python styling via component props, and file upload components. Handle file uploads in event handlers, process them server-side, and return results to the UI. These patterns integrate with the same state and event handler system.