solution0031.js

// 2621. Sleep
// Given a positive integer millis, write an asynchronous function that sleeps for millis milliseconds. It can resolve any value.

 

// Example 1:

// Input: millis = 100
// Output: 100
// Explanation: It should return a promise that resolves after 100ms.
// let t = Date.now();
// sleep(100).then(() => {
//   console.log(Date.now() - t); // 100
// });
// Example 2:

// Input: millis = 200
// Output: 200
// Explanation: It should return a promise that resolves after 200ms.
 

// Constraints:

// 1 <= millis <= 1000

async function sleep(millis) {
    
    await new Promise (res => setTimeout(res, millis))
}

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