trait MediaQueryList extends js.Object {  /** Adds a new listener to the media query list. If the specified listener is already in the list, this method has no  * effect.  */ def addListener(listener: MediaQueryListListener): Unit = js.native } /** A MediaQueryList object maintains a list of media queries on a document, and handles sending notifications to  * listeners when the media queries on the document change.  */ @js.native trait MediaQueryListListener extends js.Object { def apply(mql: MediaQueryList): Unit = js.native }