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onCompleteParams are null for tweenlite

skywolf test
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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 Some information, especially the syntax, may be out of date for GSAP 3.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'm trying to do an infinite random tween using the following code


TweenLite.to(box, 2, {left:Math.random() * 600,onComplete:completeHandler, onCompleteParams:box});


and the handler is


function completeHandler(obj) {
    if (obj)
         TweenLite.to(obj, 2, {left:Math.random() * 600,onComplete:completeHandler, onCompleteParams:obj});


but after 2 tweens, the parameter becomes null. I can use this.target instead, but there seems to be

a bug







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Hi and welcome to the GreenSock forums.


The problem is that the value you specify for onCompleteParams needs to be an array (to support multiple params).


try this:



var box = document.getElementById("box1");

TweenLite.to(box, 1, {left:Math.random() * 600,onComplete:completeHandler, onCompleteParams:[box]});

function completeHandler(obj) {
    if (obj)
         TweenLite.to(obj, 1, {left:Math.random() * 600,onComplete:completeHandler, onCompleteParams:[obj]});



See the Pen ab342c5cfd5a8667b0425d1f4fbfc7d7 by GreenSock (@GreenSock) on CodePen

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