how to set a timer on javascript code example

Example 1: delay in javascript

setTimeout(function() {
 //your code here
}, 1000);

Example 2: timer in javascript

//single event i.e. alarm, time in milliseconds
var timeout = setTimeout(function(){yourFunction()},10000);
//repeated events, gap in milliseconds
var interval = setInterval(function(){yourFunction()},1000);

Example 3: setinterval javascript

setInterval(function(){
  console.log("Hello");
  console.log("World");
}, 2000); //repeat every 2s