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
js
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
js
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