# Description

The vh unit is relative to the viewport's height. The viewport's heigh is equal to 100 'vh' units.

The format of this length value is a number followed by ‘vh’.

# Examples

This example defines a header with a font size proportional to the height of the viewport:

    h1 { font-size: 8vh }

# Browser Support

Firefox | IE | Chrome | Opera | Safari

# Miscellaneous Information

Defined In: | CSS3