Viewport Height (vh). ... This unit is based on the smaller dimension of the viewport. If the viewport height is smaller than the width, the value of 1vmin will be equal to 1% of the viewport height. Similarly, if the viewport width is smaller than the height, the value of 1vmin will be equal to 1% of the viewport width.

What is viewport size?

A viewport is defined by the size of the rectangle filled by a web page on your screen. The viewport is the size of the browser window, minus the scroll bars and toolbars. Browsers use “CSS pixels.” For many devices, such as those with retina screens, the viewport is smaller than the advertised device resolution.

How do you find the height of a viewport?

You can use the window. innerHeight property to get the viewport height, and the window. innerWidth to get its width. let viewportHeight = window.