do something later javascript code example

Example 1: javascript run something after x seconds

setTimeout(function(){
  location.reload();
}, 3000); //run this after 3 seconds

Example 2: how to do a function after a set interval js

function sayHi() {
  alert('Hello');
}
//Do a function at a set interval continuously
setTimeout(sayHi, 1000);
//Do a function once after a set interval
setTimeout(sayHi, 1000);