MediaQueryListEvent

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2020.

TheMediaQueryListEvent object stores information on the changes that have happened to aMediaQueryList object — instances are available as the event object on a function referenced by achange event.

Constructor

MediaQueryListEvent(): Creates a newMediaQueryListEvent instance.

Instance properties

TheMediaQueryListEvent interface inherits properties from its parent interface,Event.

MediaQueryListEvent.matchesRead only: A boolean value that istrue if thedocument currently matches the media query list, orfalse if not.
MediaQueryListEvent.mediaRead only: A string representing a serialized media query.

Instance methods

TheMediaQueryListEvent interface inherits methods from its parent interface,Event.

Examples

const para = document.querySelector("p"); // This is the UI element where to display the textconst mql = window.matchMedia("(width <= 600px)");mql.addEventListener("change", (event) => {  if (event.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 600 pixels wide    para.textContent = "This is a wide screen — more than 600px wide.";    document.body.style.backgroundColor = "blue";  }});