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.

Example

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 Status Comment
Media Queries Level 4
The definition of 'width' in that specification.
Candidate Recommendation The value can now be negative, in which case it computes to false.
Media Queries
The definition of 'width' in that specification.
Recommendation Initial definition. The value must be nonnegative.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support YesEdge ? Firefox Full support YesIE Full support 9Opera Full support YesSafari Full support YesWebView Android ? Chrome Android ? Edge Mobile ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown

Document Tags and Contributors

Last updated by: connorshea,