addListener method

void addListener(
  1. EventListener? callback
)

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.

Implementation

external void addListener(EventListener? callback);