MediaQueryList: removeListener() method
Deprecated
Avoid using this feature in new projects. This feature may be a candidate for removal from web standards or browsers.
The removeListener() method of the
MediaQueryList interface removes a listener from the
MediaQueryListener.
In older browsers MediaQueryList did not yet inherit from EventTarget,
so this method was provided as an alias of EventTarget.removeEventListener().
Use removeEventListener() instead of removeListener() if it is
available in the browsers you need to support.
Syntax
js
removeListener(func)
Parameters
func-
A function or function reference representing the callback function you want to remove.
Return value
None (undefined).
Examples
js
const paragraph = document.querySelector("p");
const mediaQueryList = window.matchMedia("(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);
// Later on, when it is no longer needed
mediaQueryList.removeListener(screenTest);
Specifications
| Specification |
|---|
| CSSOM View Module # dom-mediaquerylist-removelistener |