How to get the start value of a ScrollTrigger. Eg tl.scrollTrigger.start equals 0?

[mvaneijgen 1,747 Likes (Superhero)]

I want to get the start value in pixels of a specific ScrollTrigger, so what I did was log the timeline, then saw there was a scrollTrigger object. Within that object I saw the property start, but when I log tl.scrollTrigger.start I get 0. Am I missing something? 

See the Pen MWqKLww?editors=1111 by mvaneijgen (@mvaneijgen) on CodePen

[akapowl 5,225 Likes (Superhero)]

 

Hey Mitchel.

 

ScrollTriggers associated with timelines must wait 1 tick to do their calculations, so you could e.g. use a delaydCall to get what you need.

 

See the Pen wvEMNLa by akapowl (@akapowl) on CodePen

 

You can find a more thorough explanation by Jack in this recent thread (among others).

 

 

[mvaneijgen 1,747 Likes (Superhero)]

Thanks Paul! I was reality stomped on this one! Thanks again! 

[Cassie 5,412 Likes (Superhero)]

Good to see even the experts get tripped up sometimes 😂

[GreenSock 18,597 Likes (Superhero)]

Yep, exactly right. Also, you don't HAVE to wait 1 tick. The whole point is that there's no way for GSAP to know when you're done populating your timeline, so it has to wait a tick but since YOU know when you're done populating your timeline, you can manually trigger the refresh() at that point: 

See the Pen MWqyeRB?editors=1010 by GreenSock (@GreenSock) on CodePen