use javascript to time something code example

Example 1: settimeout javascript

setTimeout(function(){
 	console.log("hello");
}, 3000); //wait for atleast  3 seconds before console logging

Example 2: javascript settimeout

var timeoutID;

function delayedAlert() {
  timeoutID = window.setTimeout(window.alert, 2*1000, 'That was really slow!');
}

function clearAlert() {
  window.clearTimeout(timeoutID);
}