MediaQueryList Interface
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.
This makes it possible to observe a document to detect when its media queries change, instead of polling the values periodically, if you need to programmatically detect changes to the values of media queries on a document.
Methods
Code void addListener(MediaQueryListListener listener) #
Adds a new listener to the media query list. If the specified listener is already in the list, this method has no effect.
Parameters
listener- The
MediaQueryListListenerto invoke when the media query's evaluated result changes.
void addListener(MediaQueryListListener listener);
Code void removeListener(MediaQueryListListener listener) #
Removes a listener from the media query list. Does nothing if the specified listener isn't already in the list.
Parameters
listener- The
MediaQueryListListenerto stop calling on changes to the media query's evaluated result.
void removeListener(MediaQueryListListener listener);
Fields
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