MediaQueryList extension type

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.

You can create a MediaQueryList by calling Window.matchMedia on the window object. The resulting object handles sending notifications to listeners when the media query state changes (i.e. when the media query test starts or stops evaluating to true).

This is very useful for adaptive design, since this makes it possible to observe a document to detect when its media queries change, instead of polling the values periodically, and allows you to programmatically make changes to a document based on media query status.

on
Implemented types

Properties

hashCode → int
The hash code for this object.
no setterinherited
matches → bool
no setter
media → String
no setter
onchange ↔ EventHandler?
getter/setter pair
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

addEventListener(String type, EventListener? callback, [JSAny options]) → void
The addEventListener() method of the EventTarget interface sets up a function that will be called whenever the specified event is delivered to the target.
inherited
addListener(EventListener? callback) → void
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.
dispatchEvent(Event event) → bool
The dispatchEvent() method of the EventTarget sends an Event to the object, (synchronously) invoking the affected event listeners in the appropriate order. The normal event processing rules (including the capturing and optional bubbling phase) also apply to events dispatched manually with dispatchEvent().
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
removeEventListener(String type, EventListener? callback, [JSAny options]) → void
The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener from the target. The event listener to be removed is identified using a combination of the event type, the event listener function itself, and various optional options that may affect the matching process; see Matching event listeners for removal.
inherited
removeListener(EventListener? callback) → void
The removeListener() method of the MediaQueryList interface removes a listener from the MediaQueryListener.
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited