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Code Snippets — JavaScript

Practice typing real-world JavaScript code

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• const sum = (a, b) => a + b; const numbers = [1, 2, 3, 4, 5]; const total = numbers.reduce((acc, n) => acc + n, 0); console.log(`Total: ${total}`);
• async function fetchUser(id) { const res = await fetch(`/api/users/${id}`); if (!res.ok) throw new Error('Failed'); return res.json(); }