Web/API/MediaQueryList/addListener

The addListener() method of the MediaQueryList interface adds a listener to the MediaQueryListener that will run a custom callback function in response to the media query status changing.

This is basically an alias of EventTarget.addEventListener(), for backwards compatibility purposes. Older browsers should use addListener instead of addEventListener since MediaQueryList only inherits from EventTarget in newer browsers.

Syntax

MediaQueryList.addListener(func)

Parameters

func: A function or function reference representing the callback function you want to run when the media query status changes.

Return value

Void.

Example

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

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

mediaQueryList.addListener(screenTest);

Specifications

Specification	Status	Comment
CSS Object Model (CSSOM) View ModuleThe definition of 'addListener' 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
`addListener()`	Chrome Full support 9	Edge Full support 12	Firefox Full support 6	IE Full support 10	Opera Full support 12.1	Safari Full support 5.1 Notes' Full support 5.1 Notes' Notes' Prior to Safari 14, `MediaQueryList` is based on `EventTarget`, so you must use `addListener()` and `removeListener()` to observe media query lists.	WebView Android Full support Yes	Chrome Android Full support 18	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support 5 Notes' Full support 5 Notes' Notes' Prior to Safari 14, `MediaQueryList` is based on `EventTarget`, so you must use `addListener()` and `removeListener()` to observe media query lists.	Samsung Internet Android Full support 1.0

Legend

Full support: Full support
See implementation notes.': See implementation notes.