`-webkit-device-pixel-ratio` CSS media feature

Baseline Widely available

This feature is well established and works across many devices and browser versions. It's been available across browsers since October 2018.

The -webkit-device-pixel-ratio is a non-standard Boolean CSS media feature which is an alternative to the standard resolution media feature.

Note: If possible, use the resolution media feature query instead, which is a standard media feature. While this prefixed media feature is a WebKit feature, other browser engines may support it. See browser compatibility below.

Syntax

The -webkit-device-pixel-ratio feature is specified as a <number> value. It is a range feature, meaning that you can also use the prefixed -webkit-min-device-pixel-ratio and -webkit-max-device-pixel-ratio variants to query minimum and maximum values, respectively.

Values

<number>: The number of device pixels used to represent each CSS px. Although the value is a <number>, and thus doesn't syntactically allow units, its implicit unit is dppx.

Implementation

/* A unit of "dppx" is implied: */
@media (-webkit-min-device-pixel-ratio: 2) {
  /* … */
}
/* It is equivalent to: */
@media (min-resolution: 2dppx) {
  /* … */
}

/* Similarly: */
@media (-webkit-max-device-pixel-ratio: 2) {
  /* … */
}
/* It is equivalent to: */
@media (max-resolution: 2dppx) {
  /* … */
}

Examples

HTML

<p>This is a test of your device's pixel density.</p>

CSS

/* Exact resolution */
@media (-webkit-device-pixel-ratio: 1) {
  p {
    color: red;
  }
}

/* Minimum resolution */
@media (-webkit-min-device-pixel-ratio: 1.1) {
  p {
    font-size: 1.5em;
  }
}

/* Maximum resolution */
@media (-webkit-max-device-pixel-ratio: 3) {
  p {
    background: yellow;
  }
}

Result

Specifications

Specification
Compatibility # css-media-queries-webkit-device-pixel-ratio

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`-webkit-device-pixel-ratio`	1	12	63 Implemented as an alias for `-moz-device-pixel-ratio`.	15	3	18	63 Implemented as an alias for `-moz-device-pixel-ratio`.	14	1	1.0	4.4	1