MediaQueryList class

MediaQueryList class

A MediaQueryList object stores information on a media query applied to a document, with support for both immediate and event-driven matching against the state of the document. See CSSOM View Module specification:

Inheritance: MediaQueryListEventTargetDOMObject

The MediaQueryList type exposes the following members:

Properties

PropertyDescription
documentContext object’s associated document.
mediaA string representing a serialized media query.
matchesA boolean value that returns true if the document currently matches the media query list,
or false if not.

Methods

MethodDescription
add_event_listenerSets up a function that will be called whenever the specified event is delivered to the target.


It works by adding a function, or an object that implements IEventListener,
to the list of event listeners for the specified event type on the EventTarget on which it’s called.
If the function or object, is already in the list of event listeners for this target, they are not added a second time.
add_event_listenerSets up a function that will be called whenever the specified event is delivered to the target.


It works by adding a function, or an object that implements IEventListener,
to the list of event listeners for the specified event type on the EventTarget on which it’s called.
If the function or object, is already in the list of event listeners for this target, they are not added a second time.
remove_event_listenerThis method allows the removal of event listeners from the event target.
If an IEventListener is removed from an EventTarget while it is processing an event, it will not be triggered by the current actions.
Event Listeners can never be invoked after being removed.
remove_event_listenerThis method allows the removal of event listeners from the event target.
If an IEventListener is removed from an EventTarget while it is processing an event, it will not be triggered by the current actions.
Event Listeners can never be invoked after being removed.
get_platform_typeThis method is used to retrieve the ECMAScript object Type.
dispatch_eventDispatches an Event at the specified IEventTarget, (synchronously) invoking
the affected EventListeners in the appropriate order.
The normal event processing rules (including the capturing and optional bubbling phase) also apply to events
dispatched manually with IEventTarget.dispatch_event.
add_listenerAdd MediaQueryList matches state change event listener.
remove_listenerRemove MediaQueryList matches state change event listener.

See Also