React Fiber & JSX Parser

Interactive visualization of JSX parsing and React Fiber reconciliation process with animated data flow

Animation Controls

Speed:1000ms

Original JSX Code

Step 1: JSX → AST → Babel parsing

function App() {
  const [count, setCount] = useState(0);
  
  return (
    <div className="container">
      <h1>Counter: {count}</h1>
      <button onClick={() => setCount(count + 1)}>
        Increment
      </button>
    </div>
  );
}

Current Step

Step 1 of 5

JSX → AST → Babel parsing

Babel parser transforms JSX syntax into Abstract Syntax Tree (AST).

Data Flow

jsx-sourcebabel-parserjsx

babel-parserastjsx

Fiber Tree Structure

App

div

TEXT_ELEMENT

button

TEXT_ELEMENT