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The onchange property of the MediaQueryList interface is an event handler property representing a function that is invoked when the change event fires, i.e when the status of media query support changes. The event object is a MediaQueryListEvent instance, which is recognised as a MediaListQuery instance in older browsers, for backwards compatibility purposes.


MediaQueryList.onchange = function() { ... };


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

mql.addEventListener( "change", (e) => {
    if (e.matches) {
    /* the viewport is 600 pixels wide or less */
    console.log('This is a narrow screen — less than 600px wide.')
  } else {
    /* the viewport is more than than 600 pixels wide */
    console.log('This is a wide screen — more than 600px wide.')


Specification Status Comment
CSS Object Model (CSSOM) View Module
The definition of 'onchange' 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
onchangeChrome Full support 45Edge ? Firefox 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  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also