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Calling fucntion with timeline with arguments

savvi 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 Some information, especially the syntax, may be out of date for GSAP 3.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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Can someone tell me if its possible to pass a var to a function you call from a timeline?


I've been using timelines to call functions.. i.e.


this.tl.add(myFunction, 2)


but I want to pass a var so I thought the following:


this.tl.add.(myFunction("myvar"), 2)


But this doenst work.. any suggestions?



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Hello cocomitte, and Welcome to the GreenSock Forums!


When adding functions to the timeline, take a look at the call() method:




You can also pass parameters:

myTimeline.call(myFunction, ["param1", "param2"]);

Other examples of taken from the call() Docs:

//appends to the end of the timeline
tl.call(func, ["param1"]); 

//appends it at exactly 2 seconds into the timeline (absolute position)
tl.call(func, ["param1"], this, 2);
//appends it 2 seconds after the end (with a gap of 2 seconds)
tl.call(func, ["param1"], this, "+=2"); 
//places it at "myLabel" (and if "myLabel" doesn't exist yet, it's added to the end and then the tween is inserted there)
tl.call(func, ["param1"], this, "myLabel"); 

//places it 2 seconds after "myLabel" 
tl.call(func, ["param1"], this, "myLabel+=2");  

Does that help?

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ok almost brilliant..


So my function is a within an object and if I make a call to this function outside of the timeline it works fine i.e.:

this.tl = new TimelineMax({onUpdate:updateUI});
this.tl.add(showAnim1, 1.5)

function showAnim1(){

but when I try and tidy it up and call it directly within the timeline as shown below:

.call(parent.anim1.animateWidth, [0,300], this, 1.5)

I get a "Uncaught Cannot tween a null target."


Any idea why this would be?

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