Viewport units: vw, vh, vmin, vmax

Viewport units: vw, vh, vmin, vmax

Length units representing a percentage of the current viewport dimensions: width (vw), height (vh), the smaller of the two (vmin), or the larger of the two (vmax).

Spec http://www.w3.org/TR/css3-values/#viewport-relative-lengths
Status W3C Candidate Recommendation
IE Edge Firefox Chrome Safari Opera