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

Example 1: javascript version of sleep

//Javascipt is asyncronous so you can't pause/block code execution
//You can delay doing something with setTimeout
setTimeout(function(){
 	alert("Sup!"); 
}, 2000);//wait 2 seconds

Example 2: javascript sleep function

//Implement sleep function
function sleep(milliseconds) {
  return new Promise((resolve) => {
    setTimeout(resolve, milliseconds);
  });
}

//How to use sleep function
async function delayedGreeting() {
  console.log("Hello");
  
  await sleep(2000); //2 Seconds
  
  console.log("World!");
}

delayedGreeting();