JavaScript

Async Sleep / Delay

by @admin

12h ago

Apr 28, 2026

Public

Returns a Promise that resolves after a given number of milliseconds. Use with await to pause async functions without blocking the main thread. More readable than nested setTimeout callbacks and composable with other async utilities.

JavaScript

const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));

// Usage
async function run() {
  console.log('start');
  await sleep(1000);
  console.log('1 second later');
  await sleep(500);
  console.log('done');
}

run();

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