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Counter with Separator Decimal Point or Comma

Barrett test
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Go to solution Solved by Jonathan,

Warning: Please note

This thread was started before GSAP 3 was released. Some information, especially the syntax, may be out of date for GSAP 3. Please see the GSAP 3 migration guide and release notes for more information about how to update the code to GSAP 3's syntax. 

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I am new to the GreenSock forum and would greatly appreciate some insight and help. I have found some great posts with useful answers concerning 'Counters' however none with a separator. I apologise if I have missed one or if this post is in the wrong place.


I'm trying to add a comma to the below code to give the 'thousands' a decimal place eg 2,100.


var counter = { var: 0 };
var tal = document.getElementById("tal");
 TweenMax.to(counter, 5, {
      var: 2100, 
      onUpdate: function () {
          tal.innerHTML = Math.ceil(counter.var);


In the past I have used countUp.js to achieve this. But was wondering if TweenMax has a simple way to execute with out adding an additional js file.


Any help would be appreciated.



See the Pen KCwhx by nicolund (@nicolund) on CodePen

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Hello Barrett, and Welcome to the GreenSock Forum!


What about this:


See the Pen PWBgGQ by jonathan (@jonathan) on CodePen


It accounts for thousandths comma and only allowing 2 decimal places. Whats good about the function used is it is converted from php, since javascript has known bugs for formatting numbers and rounding floats inconsistently ;)






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  • 1 year later...
On 2/8/2017 at 1:16 PM, Jonathan said:

Try this then for no 2 decimal places


See the Pen vgzaPG by jonathan (@jonathan) on CodePen

Hi there!  This is great for a project i'm currently working on.  However I have 4 different counters on the same page.. How could I amend the script so that it can accommodate 4 separate counters?


Thank you

Screenshot 2019-01-08 at 15.45.58.png

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Hi @Whitby and Welcome to the GreenSock Forum!


To do this you need to have the to() tween in a for loop and use let instead of var so you can iterate DOM elements in the loop properly.


See the Pen VqdJVj by jonathan (@jonathan) on CodePen


function numberWithCommas(n) {
    var parts=n.toString().split(".");
    return parts[0].replace(/\B(?=(\d{3})+(?!\d))/g, ",");

var endingCounterVar = [2100, 1000, 1500, 1800];

for (let i = 0; i <= 3; i++) {

  let counter = { var: 0 };
  let tal = document.getElementById("tal-"+i);
  TweenMax.to(counter, 5, {
      var: endingCounterVar[i], 
      onUpdate: function () {
          let nwc = numberWithCommas(counter.var);
          tal.innerHTML = nwc;



Differences between using Javascript let vs var in the below codepen example (better to view on codepen with console to see output):


See the Pen Ogeovq by jonathan (@jonathan) on CodePen


Happy Tweening :)

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