Sleep

87.4% acceptance

Mar 2, 2026

710

Given a positive integer millis, write an asynchronous function that sleeps for millis milliseconds. It can resolve any value. Note that minor deviation from millis in the actual sleep duration is acceptable.

Solution

TypeScript

Time O(1)

Space O(1)

LeetCode

solution.ts

async function sleep(millis: number): Promise<void> {
  return new Promise((resolve) => setTimeout(resolve, millis));
}

/**
 * let t = Date.now()
 * sleep(100).then(() => console.log(Date.now() - t)) // 100
 */