Sometimes, we want to create a sleep or delay in Node.js.

In this article, we’ll look at how to create a sleep or delay in Node.js.

How to create a sleep or delay in Node.js?

To create a sleep or delay in Node.js, we can create a function that returns a promise to pause execution for a specific amount of time.

For instance, we write

const sleep = (millis) => {
  return new Promise(resolve => setTimeout(resolve, millis));
}


const test = async () => {
  await sleep(1000)
  console.log("one second has elapsed")
}

to define the sleep function that returns a promise which calls setTimeout with resolve as a callback after millis milliseconds.

Then we call sleep in test with 1000 to pause the function for 1000 milliseconds and then call console.log to log "one second has elapsed".

Conclusion

To create a sleep or delay in Node.js, we can create a function that returns a promise to pause execution for a specific amount of time.