Race a promise against a timeout — if the work takes longer than `ms`, reject with a timeout error. Cancels nothing on its own (use AbortController for that), but unblocks the caller.
TypeScript
export function withTimeout<T>(p: Promise<T>, ms: number, label = 'operation'): Promise<T> {
let timer: ReturnType<typeof setTimeout>;
const timeout = new Promise<never>((_, reject) => {
timer = setTimeout(() => reject(new Error(`${label} timed out after ${ms}ms`)), ms);
});
return Promise.race([p, timeout]).finally(() => clearTimeout(timer));
}
// Usage
try {
const data = await withTimeout(fetch('/slow-api').then(r => r.json()), 5_000, 'fetch /slow-api');
} catch (e) {
console.error(e); // either fetch error OR "fetch /slow-api timed out after 5000ms"
}Save your own code snippets
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