MediaQueryList

A MediaQueryList object stores information on a media query applied to a document, with support for both immediate and event-driven matching against the state of the document. You can create a MediaQueryList by calling matchMedia() on the window object. The resulting object handles sending notifications to listeners when the media query state changes (i.e. when the media query test starts or stops evaluating to true).

This is very useful for adaptive design, since this makes it possible to observe a document to detect when its media queries change, instead of polling the values periodically, and allows you to programmatically make changes to a document based on media query status.

Properties

The MediaQueryList interface inherits properties from its parent interface, EventTarget.

matchesRead only
A Boolean that returns true if the document currently matches the media query list, or false if not.
mediaRead only
A DOMString representing a serialized media query

Methods

The MediaQueryList interface inherits methods from its parent interface, EventTarget.

addListener()
Adds to the MediaQueryList a callback which is invoked whenever the media query status—whether or not the document matches the media queries in the list—changes. This method exists primarily for backward compatibility; if possible, you should instead use addEventListener() to watch for the change event.
removeListener()
Removes the specified listener callback from the callbacks to be invoked when the MediaQueryList changes  media query status, which happens any time the document switches between matching and not matching the media queries listed in the MediaQueryList. This method has been kept for backward compatibility; if possible, you should generally use removeEventListener() to remove change notification callbacks (which should have previously been added using addEventListener()).

Events

The following events are delivered to MediaQueryList objects:

change
Sent to the MediaQueryList when the result of running the media query against the document changes. For example, if the media query is (min-width: 400px), the change event is fired any time the width of the document's viewport changes such that its width moves across the 400px boundary in either direction.
Also available using the onchange event handler property.

Examples

This simple example creates a MediaQueryList and then sets up a listener to detect when the media query status changes, running a custom function when it does to change the appearence of the page.

var para = document.querySelector('p');
var mql = window.matchMedia('(max-width: 600px)');

function screenTest(e) {
  if (e.matches) {
    /* the viewport is 600 pixels wide or less */
    para.textContent = 'This is a narrow screen — less than 600px wide.';
    document.body.style.backgroundColor = 'red';
  } else {
    /* the viewport is more than than 600 pixels wide */
    para.textContent = 'This is a wide screen — more than 600px wide.';
    document.body.style.backgroundColor = 'blue';
  }
}

mql.addEventListener(screenTest);

Note: You can find this example on GitHub (see the source code, and also see it running live).

You can find other examples on the individual property and method pages.

Specifications

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
MediaQueryList
Experimental
Chrome Full support 9Edge Full support 12Firefox Full support 6IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support YesChrome Android Full support 18Firefox Android Full support YesOpera Android Full support YesSafari iOS Full support 5Samsung Internet Android Full support 1.0
EventListener objects as parametersChrome Full support 45Edge Full support ≤79Firefox Full support 55IE No support NoOpera No support NoSafari ? WebView Android Full support 45Chrome Android Full support 45Firefox Android Full support 55Opera Android No support NoSafari iOS ? Samsung Internet Android Full support 5.0
MediaQueryList inheriting from EventTargetChrome Full support 45Edge Full support 16Firefox Full support 55IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 45Chrome Android Full support 45Firefox Android Full support 55Opera Android Full support YesSafari iOS No support NoSamsung Internet Android Full support 5.0
addListenerChrome Full support 9Edge Full support 12Firefox Full support 6IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support YesChrome Android Full support 18Firefox Android Full support YesOpera Android Full support YesSafari iOS Full support 5Samsung Internet Android Full support 1.0
matchesChrome Full support 9Edge Full support 12Firefox Full support 6IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support YesChrome Android Full support 18Firefox Android Full support YesOpera Android Full support YesSafari iOS Full support 5Samsung Internet Android Full support 1.0
mediaChrome Full support 9Edge Full support 12Firefox Full support 6IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support YesChrome Android Full support 18Firefox Android Full support YesOpera Android Full support YesSafari iOS Full support 5Samsung Internet Android Full support 1.0
onchangeChrome Full support 45Edge Full support ≤79Firefox Full support 55IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 45Chrome Android Full support 45Firefox Android Full support 55Opera Android Full support YesSafari iOS No support NoSamsung Internet Android Full support 5.0
removeListenerChrome Full support 9Edge Full support 12Firefox Full support 6IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support YesChrome Android Full support 18Firefox Android Full support YesOpera Android Full support YesSafari iOS Full support 5Samsung Internet Android Full support 1.0

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also