MediaQueryList: addListener() method

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The deprecated 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.

In older browsers MediaQueryList did not yet inherit from EventTarget, so this method was provided as an alias of EventTarget.addEventListener(). Use addEventListener() instead of addListener() if it is available in the browsers you need to support.

Syntax

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

None (undefined).

Examples

const paragraph = document.querySelector("p");
const 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 600 pixels wide */
    paragraph.textContent = "This is a wide screen — more than 600px wide.";
    document.body.style.backgroundColor = "aquamarine";
  }
}

mediaQueryList.addListener(screenTest);

Specifications

Specification
CSSOM View Module
# dom-mediaquerylist-addlistener

Browser compatibility

BCD tables only load in the browser

See also