Timeline progress not returning to 0

[Edify Technologies]

Checkout the codepen. If you use the buttons to set timeline progress(), you can go back and forth between 0 and 0.5 no problem, but as soon as you go to 1, you can't get back to 0. I've experimented with other values as well, and everything seems to work until you go to 1 for the first time. After that, when you try and return to 0 it reevaluates to 1.

 

Does this look like a bug, or do I have my logic wrong? Thanks!

See the Pen GRgJPdV by sallf (@sallf) on CodePen

[GreenSock]

Yes indeed, good catch (though about 5 hours too late - we just pushed 3.0.2 out)

 

It had to do with a complexity related to repeating animations - if you think about it, when the playhead is at the VERY end of the animation, that's the same spot as the very BEGINNING of the next iteration. So this would only happen when you have a repeating tween and you set progress() to 1 and then 0. Glad you found that! It should be fixed in the next release which you can preview at https://s3-us-west-2.amazonaws.com/s.cdpn.io/16327/gsap-latest-beta.min.js

[Edify Technologies]

Thanks @GreenSock! Ya, that paradox totally makes sense. And, removing repeat: -1 fixes the problem.