I've been working with Timeline and divs of a 50% width to adjust for window resize. The problem I've encounters is that if you plan on reversing a timeline, it does not recognize that you have resized your divs. I didn't have a good way of showing this in code pen, but this is the site I'm working on: http://heroicdreams.com/test/#servicesportfolio
The two divs that break are the colored backdrops. After it animates in, resize the window then click any link and you can see how it glitches from the beginning of the animation. It only remembers the previous div position, not the new resized one.