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// Live React sandbox — write components, watch them render. // Every state change and commit is captured below in real time. function Counter({ label }) { const [count, setCount] = useState(0); return ( <div style={{ padding: 8, border: '1px solid #444', borderRadius: 6, marginBottom: 8 }}> <div style={{ fontSize: 12, opacity: 0.7 }}>{label}</div> <div style={{ fontSize: 24, fontWeight: 600 }}>{count}</div> <button onClick={() => setCount(count + 1)}>+1</button> </div> ); } function App() { const [name, setName] = useState('world'); return ( <div style={{ fontFamily: 'system-ui', color: '#e5e7eb' }}> <h2>Hello, {name}!</h2> <input value={name} onChange={(e) => setName(e.target.value)} /> <Counter label="Counter A" /> <Counter label="Counter B" /> </div> ); }
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