how-to-sleep-in-nodejs.md

How to sleep in Nodejs

async function init() {
  console.log(new Date());
  await sleep(1500);
  console.log(new Date());
}

function sleep(ms) {
  return new Promise((resolve) => {
    setTimeout(resolve, ms);
  });
}

init();

• sleep( - custom function to sleep for a given number of milliseconds
• new Promise( - creates new promise
• setTimeout - calls given callback in a given number of milliseconds
• await sleep(1500); - will synchronously sleep for 1.5 seconds

Example:

async function init() {
  console.log(new Date());
  await sleep(1500);
  console.log(new Date());
}

function sleep(ms) {
  return new Promise((resolve) => {
    setTimeout(resolve, ms);
  });
}

init();

2022-08-04T11:08:11.484Z
2022-08-04T11:08:12.990Z