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width

The width CSS media feature can be used to test the width of the viewport (or the page box, for paged media).

Syntax

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

Examples

HTML

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

CSS

/* Exact width */
@media (width: 360px) {
  div {
    color: red;
  }
}

/* Minimum width */
@media (min-width: 35rem) {
  div {
    background: yellow;
  }
}

/* Maximum width */
@media (max-width: 50rem) {
  div {
    border: 2px solid blue;
  }
}

Result

Specifications

Specification
Media Queries Level 4 # width

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`width`	1	12	2	9	10	3	≤37	18	4	10.1	1	1.0