@media.aspect-ratio

The aspect-ratio CSS media feature can be used to test the aspect ratio of the viewport.

Syntax

The aspect-ratio feature is specified as a <ratio> value representing the width-to-height aspect ratio of the viewport. It is a range feature, meaning you can also use the prefixed min-aspect-ratio and max-aspect-ratio variants to query minimum and maximum values, respectively.

Example

The example below is contained in an <iframe>, which creates its own viewport. Resize the <iframe> to see aspect-ratio in action.

HTML

<div>Watch this element as you resize your viewport's width and height.</div>

CSS

/* Exact aspect ratio */
@media (aspect-ratio: 1/1) {
  div {
    color: red;
  }
}

/* Minimum aspect ratio */
@media (min-aspect-ratio: 8/5) {
  div {
    background: yellow;
  }
}

/* Maximum aspect ratio */
@media (max-aspect-ratio: 2/1) {
  div {
    border: 2px solid blue;
  }
}

Result

Specifications

Browser compatibilityUpdate compatibility data on GitHub