The JavaScript Library

Build Anything. Ship Fast. React.

The JavaScript library that powers the most ambitious interfaces on the internet. Explore what makes React the #1 choice for modern web development.

Welcome.jsx

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Hello, World!

World

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What React Does

Three core ideas that changed frontend development forever.

⚛️

Build encapsulated pieces that manage their own state, then compose them into complex UIs.

function Button({ label }) {
  return (
    <button className="btn">
      {label}
    </button>
  );
}

🎯

Design views for each state. React efficiently updates and renders just the right components.

const [count, setCount] = useState(0);

return (
  <p>Count: {count}</p>
  <button onClick={() =>
    setCount(c => c + 1)}>
    +1
  </button>
);

🌐

Web, mobile, desktop, server — React runs everywhere your code needs to go.

// React Native
import { View, Text } from
  'react-native';

function App() {
  return (
    <View>
      <Text>Hello!</Text>
    </View>
  );
}

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Most Used Frontend Framework

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Weekly npm Downloads

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Developers Worldwide

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