A CodePen by Marco Carag. Viewport Unit Webkit Width Bug? - Getting some unexpected behavior when using viewport units (vw, vh, vmin, and vmax) in Webkit browsers: The parents of elements that have fixed widths set in viewport units no longer size to fit the widths of their children. View this pen in Firefox and Chrome/Safari to see what I mean.

Only affects width, not height which acts more as expected. Is this intended behavior?

Tried in Chrome 26 stable and 29 Canary, Safari 6.04, and Firefox 20.