how to set time interval for every 3000 in javascript code example

Example 1: jquery call function every second

setInterval(function(){ 
    //this code runs every second 
}, 1000);

Example 2: javascipt delay

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

console.log("Hello");
sleep(2000).then(() => { console.log("World!"); });