1  setTimeout(function(){ 
2    console.log("Ready")
3}, 1000);

1function sleep(milliseconds) {
2  const date = Date.now();
3  let currentDate = null;
4  do {
5    currentDate = Date.now();
6  } while (currentDate - date < milliseconds);
7}
8
9console.log("Hello");
10sleep(2000);
11console.log("World!");

1 wait(ms) {
2        return new Promise(resolve => setTimeout(resolve, ms));
3 }

1setTimeout(() => {  console.log("2000 milliseconds later!"); }, 2000);