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Tween in my timeline doesn't reverse

lateek35 test
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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 Some information, especially the syntax, may be out of date for GSAP 3.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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Hello !


I've created a timeline and add this specific tween. Everything work well when I fired 


The problem is when I fired the reverse() function, open var doesn't decrease and stay at 31.

Here the part of the code which doesn't reverse


var tweenValues = { open : 1 };
myTimeline.fromTo(tweenValues, 2, { open: 1}, { open: 31, onUpdate:function(){
    var srcCeil = Math.ceil(tweenValues.open);
    target.src = './img/img'+ srcCeil +'.png';


If any of you have an idea ? :)

Thanks !

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Hi lateek35 :)


Welcome to the forums.


Are you reversing after you play like this:

var myTimeline = new TimelineMax( {paused:true, onComplete: function() {myTimeline.reverse()}});

or did you mean that you just want to reverse the tween without playing it first. If you want to do that, you could try this:

// reverse from two seconds

// or you could set the timeline to reversed and then just a reverse() should work
var myTimeline = new TimelineMax( {paused:true,reversed:true});

Hopefully that helps a bit. For future questions or more detailed answers, a CodePen example will get you the best information. Please check out this link to learn more about creating one:



Happy tweening and welcome aboard.


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Ok I finally found the problem !
In fact, I didn't gave you the part of code where the problem was.
I was creating the timeline in a for loop, and using "i" for select some object etc. Use a closure was the key to solve the scope state problem of "i" :)

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Hi lateek35  :)


at first you don't need to use Math.ceil() , you just need to add roundProps : ' property ' to your tweens ;


pls check RoundPropsPlugin Doc :  http://greensock.com/docs#/HTML5/Plugins/RoundPropsPlugin/


and pls check this out : 

See the Pen adLBQK by MAW (@MAW) on CodePen


pls fork above codepen demo with simple shape of your code , if still have any problem .

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