The Window interface's matchMedia() method returns a new MediaQueryList object that can then be used to determine if the document matches the media query string, as well as to monitor the document to detect when it matches (or stops matching) that media query.


mqList = window.matchMedia(mediaQueryString)


A string specifying the media query to parse into a MediaQueryList.

Return value

A new MediaQueryList object for the media query. Use this object's properties and events to detect matches and to monitor for changes to those matches over time.

Usage notes

You can use the returned media query to perform both instantanteous and event-driven checks to see if the document matches the media query.

To perform a one-time, instantaneous check to see if the document matches the media query, look at the value of the matches property, which will be true if the document meets the media query's requirements.

If you need to be kept aware of whether or not the document matches the media query at all times, you can instead watch for the change event to be delivered to the object. There's a good example of this in the article on Window.devicePixelRatio.


This example runs the media query (max-width: 600px) and  displays the value of the resulting MediaQueryList's matches property in a <span>; as a result, the output will say "true" if the viewport is less than or equal to 600 pixels wide, and will say "false" if the window is wider than that.


let mql = window.matchMedia('(max-width: 600px)');

document.querySelector(".mq-value").innerText = mql.matches;

The JavaScript code simply passes the media query to match into matchMedia() to compile it, then sets the <span>'s innerText to the value of the results' matches property, so that it indicates whether or not the document matches the media query at the moment the page was loaded.


<span class="mq-value"></span>

A simple <span> to receive the output.


See Testing media queries programmatically for additional code examples.


Specification Status Comment
CSS Object Model (CSSOM) View Module
The definition of 'Window.matchMedia()' in that specification.
Working Draft Initial definition

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
matchMediaChrome Full support 9Edge Full support 12Firefox Full support 6IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support ≤37Chrome Android Full support 18Firefox Android Full support 6Opera Android Full support 12.1Safari iOS Full support 5Samsung Internet Android Full support 1.0


Full support  
Full support

See also