Reflex Development

Overview

Reflex is a full-stack Python framework for building web applications without writing JavaScript. Apps compile to a React frontend and FastAPI backend, with state management and event handlers running entirely in Python.

Architecture:

• Frontend: Compiled to React (JavaScript) for UI rendering
• Backend: FastAPI server running Python event handlers
• Communication: WebSockets for real-time state updates
• State: Server-side Python state synchronized to frontend

Core Concepts

State Management

State is a Python class that holds all mutable data and event handlers. All state variables must be JSON-serializable.