JSFiddle - React, Tailwind, and code Playground

by Rajshekar Reddy

HTML

<button id="myButton">
 click Me For Change!!
</button>

JavaScript

var myVar = 0;
var oldVar = 0;
$("#myButton").click(function(){
    myVar++;
});

setInterval(function(){  
  checkForChanges(); // after every 2 secs check
  oldVar = myVar; // reset the old value now to the new one, so during next check we should have our myVar changed.
},2000);

function checkForChanges(){
  if(oldVar === myVar){
    alert('same value nothing has changed!!');
  }
  else{
   alert('The value changed!!');
  }
}