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Conditions inside Timeline

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 Some information, especially the syntax, may be out of date for GSAP 3.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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Hi everyone, as I get better in GSAP, my needs also increase and everyone on the forums have been very helpful.


What I want to do is, check for a condition, lets say if element.length > 0, and add tween inside the timeline. What is the best way of doing this?



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Hello anteksiler,


You can try and use the add() method.. here are some common uses for add():




//add a tween to the end of the timeline
 tl.add( TweenLite.to(element, 2, {left:100}) );
 //add a callback at 1.5 seconds
 tl.add(func, 1.5); 
 //add a label 2 seconds after the end of the timeline (with a gap of 2 seconds)
 tl.add("myLabel", "+=2");
 //add another timeline at "myLabel"
 tl.add(otherTimeline, "myLabel"); 
 //add an array of tweens 2 seconds after "myLabel"
 tl.add([tween1, tween2, tween3], "myLabel+=2"); 
 //add an array of tweens so that they are sequenced one-after-the-other with 0.5 seconds inbetween them, starting 2 seconds after the end of the timeline
 tl.add([tween1, tween2, tween3], "+=2", "sequence", 0.5);


Then a possible use is:


// create timelines
 var tl = new TimelineMax(),
     otherTimeline  = new TimelineMax();

// other tweens and timelines ...

//add otherTimeline instance in tl instance at "myLabel"
 tl.add(otherTimeline, "myLabel"); 

// other tweens and timelines ...







I hope this helps :)

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Hi anteksiler  :)


you can do something like this :

var tl = new TimelineMax({paused:true});

if ( elements.length > 0 ) { tl.to(elements,5,{......}) };
as Jonathan said , you can use labels / gaps,delays for your tweens :

var tl = new TimelineMax({paused:true});
    tl.add("youLabel", "+=2")

if ( elements.length > 0 ) { tl.to(elements,5,{......},"youLabel") };
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