js wait for a second code example

Example 1: javascript sleep

function sleep(milliseconds) {
  const date = Date.now();
  let currentDate = null;
  do {
    currentDate = Date.now();
  } while (currentDate - date < milliseconds);
}

console.log("Hello");
sleep(2000);
console.log("World!");

Example 2: javascript wait 1 second

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

Example 3: javascript wait 1 second

setTimeout(() => {console.log('1 second finished!')}, 1000);