Web/API/MediaQueryListEvent

The MediaQueryListEvent object stores information on the changes that have happened to a MediaQueryList object — instances are available as the event object on a function referenced by a MediaQueryList.onchange property or MediaQueryList.addListener() call.

Constructor

MediaQueryListEvent(): Creates a new MediaQueryListEvent instance.

Properties

The MediaQueryListEvent interface inherits properties from its parent interface, Event.

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

Methods

The MediaQueryListEvent interface inherits methods from its parent interface, Event.

Examples

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.addListener(screenTest);

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`MediaQueryListEvent`	Chrome Full support Yes	Edge Full support ≤79	Firefox Full support 55	IE No support No	Opera Full support Yes	Safari Full support 14	WebView Android No support No	Chrome Android Full support Yes	Firefox Android Full support 55	Opera Android Full support Yes	Safari iOS Full support 14	Samsung Internet Android Full support Yes
`MediaQueryListEvent()` constructor	Chrome Full support Yes	Edge Full support ≤79	Firefox Full support 55	IE No support No	Opera Full support Yes	Safari Full support 14	WebView Android No support No	Chrome Android Full support Yes	Firefox Android Full support 55	Opera Android Full support Yes	Safari iOS Full support 14	Samsung Internet Android Full support Yes
`matches`	Chrome Full support Yes	Edge Full support ≤79	Firefox Full support 55	IE No support No	Opera Full support Yes	Safari Full support 14	WebView Android No support No	Chrome Android Full support Yes	Firefox Android Full support 55	Opera Android Full support Yes	Safari iOS Full support 14	Samsung Internet Android Full support Yes
`media`	Chrome Full support Yes	Edge Full support ≤79	Firefox Full support 55	IE No support No	Opera Full support Yes	Safari Full support 14	WebView Android No support No	Chrome Android Full support Yes	Firefox Android Full support 55	Opera Android Full support Yes	Safari iOS Full support 14	Samsung Internet Android Full support Yes

Legend

Full support: Full support
No support: No support