relative values issue in GSAP Posted April 23, 2013 Yes, I'm using the JS version. I only recently find out about the "-=/+=" way of doing it because of this issue. Although, the version of the library I'm using hasn't been updated in a while (it's beta 1.65 version from 6 months ago). I think the most sensible solution is to go back and update all my previous stuff and the library. Thanks for your input, guys.