GSAP/Jack - Could you please define what xPercent and yPercent is a percent of? I have seen the codepens and explanations of how it works, but I'm having trouble applying it because I haven't seen a definition anywhere.
For example, I see you have to set top and left first, then xPercent and yPercent work, otherwise it moves things outside the div. Why? Just need to know the actual definition. Could definitely be my lack of overall CSS knowledge. Thanks!
Have already looked here:
http://greensock.com/docs/#/HTML5/GSAP/Plugins/CSSPlugin/
http://greensock.com/gsap-1-13-1