The matches read-only property of the MediaQueryListEvent interface is a Boolean that returns true if the document currently matches the media query list, or false if not.


var matches = MediaQueryListEvent.matches;


A Boolean; returns true if the document currently matches the media query list, false if not.


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.'; = 'red';
  } else {
    /* the viewport is more than than 600 pixels wide */
    para.textContent = 'This is a wide screen — more than 600px wide.'; = 'blue';



Specification Status Comment
CSS Object Model (CSSOM) View Module
The definition of 'matches' 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
matchesChrome Full support YesEdge Full support ≤79Firefox Full support 55IE No support NoOpera Full support YesSafari Full support 14WebView Android No support NoChrome Android Full support YesFirefox Android Full support 55Opera Android Full support YesSafari iOS Full support 14Samsung Internet Android Full support Yes


Full support  
Full support
No support  
No support

See also