description

# Window class

Top-level container for the current browser tab or window.

In a web browser, each window has a Window object, but within the context of a script, this object represents only the current window. Each other window, tab, and iframe has its own Window object.

Each window contains a Document object, which contains all of the window's content.

Use the top-level `window` object to access the current window. For example:

    // Draw a scene when the window repaints.
    drawScene(num delta) {...}
    window.animationFrame.then(drawScene);.

    // Write to the console.
    window.console.log('Jinkies!');
    window.console.error('Jeepers!');

Note: This class represents only the current window, while WindowBase is a representation of any window, including other tabs, windows, and frames.

## See also

- WindowBase

## Other resources

- DOM Window from MDN.
- Window from the W3C.

Inheritance
  - Object
  - EventTarget
  - Window
Implemented types
  - GlobalEventHandlers
  - WindowBase64
  - WindowEventHandlers
  - WindowBase
Annotations
  - @Native.new("Window,DOMWindow")

## Properties

animationFrame → Future<num>
  Returns a Future that completes just before the window is about to repaint so the user can draw an animation frame.
  no setter
animationWorklet → _Worklet?
  no setter
applicationCache → ApplicationCache?
  The application cache for this window.
  no setter
audioWorklet → _Worklet?
  no setter
caches → CacheStorage?
  no setter
closed → bool?
  Indicates whether this window has been closed.
  no setteroverride
console → Console
  The debugging console for this window.
  no setter
cookieStore → CookieStore?
  no setter
crypto → Crypto?
  Entrypoint for the browser's cryptographic functions.
  no setter
customElements → CustomElementRegistry?
  no setter
defaultStatus ↔ String?
  Deprecated.
  getter/setter pair
defaultstatus ↔ String?
  Deprecated.
  getter/setter pair
devicePixelRatio → num
  The ratio between physical pixels and logical CSS pixels.
  no setter
document → Document
  The newest document in this window.
  no setter
external → External?
  no setter
hashCode → int
  The hash code for this object.
  no setterinherited
history → History
  The current session history for this window's newest document.
  no setteroverride
indexedDB → IdbFactory?
  Gets an instance of the Indexed DB factory to being using Indexed DB.
  no setter
innerHeight → int?
  The height of the viewport including scrollbars.
  no setter
innerWidth → int?
  The width of the viewport including scrollbars.
  no setter
isSecureContext → bool?
  no setter
localStorage → Storage
  Storage for this window that persists across sessions.
  no setter
location ↔ Location
  The current location of this window.
  getter/setter pairoverride-getter
locationbar → BarProp?
  This window's location bar, which displays the URL.
  no setter
menubar → BarProp?
  This window's menu bar, which displays menu commands.
  no setter
name ↔ String?
  The name of this window.
  getter/setter pair
navigator → Navigator
  The user agent accessing this window.
  no setter
offscreenBuffering → bool?
  Whether objects are drawn offscreen before being displayed.
  no setter
on → Events
  This is an ease-of-use accessor for event streams which should only be used when an explicit accessor is not available.
  no setterinherited
onAbort → Stream<Event>
  Stream of `abort` events handled by this Window.
  no setteroverride
onAnimationEnd → Stream<AnimationEvent>
  Stream of `animationend` events handled by this Window.
  no setter
onAnimationIteration → Stream<AnimationEvent>
  Stream of `animationiteration` events handled by this Window.
  no setter
onAnimationStart → Stream<AnimationEvent>
  Stream of `animationstart` events handled by this Window.
  no setter
onBeforeUnload → Stream<Event>
  Stream of `beforeunload` events handled by this Window.
  no setter
onBlur → Stream<Event>
  Stream of `blur` events handled by this Window.
  no setteroverride
onCanPlay → Stream<Event>
  no setteroverride
onCanPlayThrough → Stream<Event>
  no setteroverride
onChange → Stream<Event>
  Stream of `change` events handled by this Window.
  no setteroverride
onClick → Stream<MouseEvent>
  Stream of `click` events handled by this Window.
  no setteroverride
onContentLoaded → Stream<Event>
  Stream of `contentloaded` events handled by this Window.
  no setter
onContextMenu → Stream<MouseEvent>
  Stream of `contextmenu` events handled by this Window.
  no setteroverride
onDeviceMotion → Stream<DeviceMotionEvent>
  Stream of `devicemotion` events handled by this Window.
  no setter
onDeviceOrientation → Stream<DeviceOrientationEvent>
  Stream of `deviceorientation` events handled by this Window.
  no setter
onDoubleClick → Stream<Event>
  Stream of `doubleclick` events handled by this Window.
  no setteroverride
onDrag → Stream<MouseEvent>
  Stream of `drag` events handled by this Window.
  no setteroverride
onDragEnd → Stream<MouseEvent>
  Stream of `dragend` events handled by this Window.
  no setteroverride
onDragEnter → Stream<MouseEvent>
  Stream of `dragenter` events handled by this Window.
  no setteroverride
onDragLeave → Stream<MouseEvent>
  Stream of `dragleave` events handled by this Window.
  no setteroverride
onDragOver → Stream<MouseEvent>
  Stream of `dragover` events handled by this Window.
  no setteroverride
onDragStart → Stream<MouseEvent>
  Stream of `dragstart` events handled by this Window.
  no setteroverride
onDrop → Stream<MouseEvent>
  Stream of `drop` events handled by this Window.
  no setteroverride
onDurationChange → Stream<Event>
  no setteroverride
onEmptied → Stream<Event>
  no setteroverride
onEnded → Stream<Event>
  no setteroverride
onError → Stream<Event>
  Stream of `error` events handled by this Window.
  no setteroverride
onFocus → Stream<Event>
  Stream of `focus` events handled by this Window.
  no setteroverride
onHashChange → Stream<Event>
  Stream of `hashchange` events handled by this Window.
  no setteroverride
onInput → Stream<Event>
  Stream of `input` events handled by this Window.
  no setteroverride
onInvalid → Stream<Event>
  Stream of `invalid` events handled by this Window.
  no setteroverride
onKeyDown → Stream<KeyboardEvent>
  Stream of `keydown` events handled by this Window.
  no setteroverride
onKeyPress → Stream<KeyboardEvent>
  Stream of `keypress` events handled by this Window.
  no setteroverride
onKeyUp → Stream<KeyboardEvent>
  Stream of `keyup` events handled by this Window.
  no setteroverride
onLoad → Stream<Event>
  Stream of `load` events handled by this Window.
  no setteroverride
onLoadedData → Stream<Event>
  no setteroverride
onLoadedMetadata → Stream<Event>
  no setteroverride
onLoadStart → Stream<Event>
  no setter
onMessage → Stream<MessageEvent>
  Stream of `message` events handled by this Window.
  no setteroverride
onMouseDown → Stream<MouseEvent>
  Stream of `mousedown` events handled by this Window.
  no setteroverride
onMouseEnter → Stream<MouseEvent>
  Stream of `mouseenter` events handled by this Window.
  no setteroverride
onMouseLeave → Stream<MouseEvent>
  Stream of `mouseleave` events handled by this Window.
  no setteroverride
onMouseMove → Stream<MouseEvent>
  Stream of `mousemove` events handled by this Window.
  no setteroverride
onMouseOut → Stream<MouseEvent>
  Stream of `mouseout` events handled by this Window.
  no setteroverride
onMouseOver → Stream<MouseEvent>
  Stream of `mouseover` events handled by this Window.
  no setteroverride
onMouseUp → Stream<MouseEvent>
  Stream of `mouseup` events handled by this Window.
  no setteroverride
onMouseWheel → Stream<WheelEvent>
  Stream of `mousewheel` events handled by this Window.
  no setteroverride
onOffline → Stream<Event>
  Stream of `offline` events handled by this Window.
  no setteroverride
onOnline → Stream<Event>
  Stream of `online` events handled by this Window.
  no setteroverride
onPageHide → Stream<Event>
  Stream of `pagehide` events handled by this Window.
  no setter
onPageShow → Stream<Event>
  Stream of `pageshow` events handled by this Window.
  no setter
onPause → Stream<Event>
  no setteroverride
onPlay → Stream<Event>
  no setteroverride
onPlaying → Stream<Event>
  no setteroverride
onPopState → Stream<PopStateEvent>
  Stream of `popstate` events handled by this Window.
  no setteroverride
onProgress → Stream<Event>
  no setter
onRateChange → Stream<Event>
  no setteroverride
onReset → Stream<Event>
  Stream of `reset` events handled by this Window.
  no setteroverride
onResize → Stream<Event>
  Stream of `resize` events handled by this Window.
  no setteroverride
onScroll → Stream<Event>
  Stream of `scroll` events handled by this Window.
  no setteroverride
onSearch → Stream<Event>
  Stream of `search` events handled by this Window.
  no setter
onSeeked → Stream<Event>
  no setteroverride
onSeeking → Stream<Event>
  no setteroverride
onSelect → Stream<Event>
  Stream of `select` events handled by this Window.
  no setteroverride
onStalled → Stream<Event>
  no setteroverride
onStorage → Stream<StorageEvent>
  Stream of `storage` events handled by this Window.
  no setteroverride
onSubmit → Stream<Event>
  Stream of `submit` events handled by this Window.
  no setteroverride
onSuspend → Stream<Event>
  no setteroverride
onTimeUpdate → Stream<Event>
  no setteroverride
onTouchCancel → Stream<TouchEvent>
  Stream of `touchcancel` events handled by this Window.
  no setteroverride
onTouchEnd → Stream<TouchEvent>
  Stream of `touchend` events handled by this Window.
  no setteroverride
onTouchMove → Stream<TouchEvent>
  Stream of `touchmove` events handled by this Window.
  no setteroverride
onTouchStart → Stream<TouchEvent>
  Stream of `touchstart` events handled by this Window.
  no setteroverride
onTransitionEnd → Stream<TransitionEvent>
  Stream of `transitionend` events handled by this Window.
  no setter
onUnload → Stream<Event>
  Stream of `unload` events handled by this Window.
  no setteroverride
onVolumeChange → Stream<Event>
  no setteroverride
onWaiting → Stream<Event>
  no setteroverride
onWheel → Stream<WheelEvent>
  Stream of `wheel` events handled by this Window.
  no setteroverride
opener ↔ WindowBase?
  A reference to the window that opened this one.
  getter/setter pairoverride-getter
orientation → int?
  no setter
origin → String?
  no setter
outerHeight → int
  The height of this window including all user interface elements.
  no setter
outerWidth → int
  The width of the window including all user interface elements.
  no setter
pageXOffset → int
  no setter
pageYOffset → int
  no setter
parent → WindowBase?
  A reference to the parent of this window.
  no setteroverride
performance → Performance
  Timing and navigation data for this window.
  no setter
runtimeType → Type
  A representation of the runtime type of the object.
  no setterinherited
screen → Screen?
  Information about the screen displaying this window.
  no setter
screenLeft → int?
  The distance from the left side of the screen to the left side of this window.
  no setter
screenTop → int?
  The distance from the top of the screen to the top of this window.
  no setter
screenX → int?
  The distance from the left side of the screen to the mouse pointer.
  no setter
screenY → int?
  The distance from the top of the screen to the mouse pointer.
  no setter
scrollbars → BarProp?
  This window's scroll bars.
  no setter
scrollX → int
  The distance this window has been scrolled horizontally.
  no setter
scrollY → int
  The distance this window has been scrolled vertically.
  no setter
self → WindowBase?
  The current window.
  no setter
sessionStorage → Storage
  Storage for this window that is cleared when this session ends.
  no setter
speechSynthesis → SpeechSynthesis?
  Access to speech synthesis in the browser.
  no setter
status ↔ String?
  Deprecated.
  getter/setter pair
statusbar → BarProp?
  This window's status bar.
  no setter
styleMedia → StyleMedia?
  Access to CSS media queries.
  no setter
toolbar → BarProp?
  This window's tool bar.
  no setter
top → WindowBase?
  A reference to the topmost window in the window hierarchy.
  no setteroverride
visualViewport → VisualViewport?
  no setter
window → WindowBase?
  The current window.
  no setter

## Methods

addEventListener(String type, EventListener? listener, [bool? useCapture]) → void
  inherited
alert([String? message]) → void
  Displays a modal alert to the user.
atob(String atob) → String
  override
btoa(String btoa) → String
  override
cancelAnimationFrame(int id) → void
  Cancels an animation frame request.
cancelIdleCallback(int handle) → void
close() → void
  Closes the window.
  override
confirm([String? message]) → bool
  Displays a modal OK/Cancel prompt to the user.
dispatchEvent(Event event) → bool
  inherited
fetch(dynamic input, [Map? init]) → Future
find(String? string, bool? caseSensitive, bool? backwards, bool? wrap, bool? wholeWord, bool? searchInFrames, bool? showDialog) → bool
  Finds text in this window.
getComputedStyleMap(Element element, String? pseudoElement) → StylePropertyMapReadonly
getMatchedCssRules(Element? element, String? pseudoElement) → List<CssRule>
  Returns all CSS rules that apply to the element's pseudo-element.
getSelection() → Selection?
  Returns the currently selected text.
matchMedia(String query) → MediaQueryList
  Returns a list of media queries for the given query string.
moveBy(int x, int y) → void
  Moves this window.
moveTo(Point<num> p) → void
  Moves this window to a specific position.
noSuchMethod(Invocation invocation) → dynamic
  Invoked when a nonexistent method or property is accessed.
  inherited
open(String url, String name, [String? options]) → WindowBase
  Opens a new window.
postMessage(dynamic message, String targetOrigin, [List<Object>? transfer]) → void
  Sends a cross-origin message.
  override
print() → void
  Opens the print dialog for this window.
removeEventListener(String type, EventListener? listener, [bool? useCapture]) → void
  inherited
requestAnimationFrame(FrameRequestCallback callback) → int
  Called to draw an animation frame and then request the window to repaint after `callback` has finished (creating the animation).
requestFileSystem(int size, {bool persistent = false}) → Future<FileSystem>
  Access a sandboxed file system of `size` bytes.
requestIdleCallback(IdleRequestCallback callback, [Map? options]) → int
resizeBy(int x, int y) → void
  Resizes this window by an offset.
resizeTo(int x, int y) → void
  Resizes this window to a specific width and height.
resolveLocalFileSystemUrl(String url) → Future<Entry>
  Asynchronously retrieves a local filesystem entry.
scroll([dynamic options_OR_x, dynamic y, Map? scrollOptions]) → void
  Scrolls the page horizontally and vertically to a specific point.
scrollBy([dynamic options_OR_x, dynamic y, Map? scrollOptions]) → void
  Scrolls the page horizontally and vertically by an offset.
scrollTo([dynamic options_OR_x, dynamic y, Map? scrollOptions]) → void
  Scrolls the page horizontally and vertically to a specific point.
stop() → void
  Stops the window from loading.
toString() → String
  A string representation of this object.
  inherited

## Operators

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

## Static Properties

supportsPointConversions → bool
  convertPointFromNodeToPage and convertPointFromPageToNode are removed. see http://dev.w3.org/csswg/cssom-view/#geometry
  no setter

## Constants

animationEndEvent → const EventStreamProvider<AnimationEvent>
  Static factory designed to expose `animationend` events to event handlers that are not necessarily instances of Window.
animationIterationEvent → const EventStreamProvider<AnimationEvent>
  Static factory designed to expose `animationiteration` events to event handlers that are not necessarily instances of Window.
animationStartEvent → const EventStreamProvider<AnimationEvent>
  Static factory designed to expose `animationstart` events to event handlers that are not necessarily instances of Window.
beforeUnloadEvent → const EventStreamProvider<BeforeUnloadEvent>
  Static factory designed to expose `beforeunload` events to event handlers that are not necessarily instances of Window.
contentLoadedEvent → const EventStreamProvider<Event>
  Static factory designed to expose `contentloaded` events to event handlers that are not necessarily instances of Window.
deviceMotionEvent → const EventStreamProvider<DeviceMotionEvent>
  Static factory designed to expose `devicemotion` events to event handlers that are not necessarily instances of Window.
deviceOrientationEvent → const EventStreamProvider<DeviceOrientationEvent>
  Static factory designed to expose `deviceorientation` events to event handlers that are not necessarily instances of Window.
hashChangeEvent → const EventStreamProvider<Event>
  Static factory designed to expose `hashchange` events to event handlers that are not necessarily instances of Window.
loadStartEvent → const EventStreamProvider<Event>
messageEvent → const EventStreamProvider<MessageEvent>
  Static factory designed to expose `message` events to event handlers that are not necessarily instances of Window.
offlineEvent → const EventStreamProvider<Event>
  Static factory designed to expose `offline` events to event handlers that are not necessarily instances of Window.
onlineEvent → const EventStreamProvider<Event>
  Static factory designed to expose `online` events to event handlers that are not necessarily instances of Window.
pageHideEvent → const EventStreamProvider<Event>
  Static factory designed to expose `pagehide` events to event handlers that are not necessarily instances of Window.
pageShowEvent → const EventStreamProvider<Event>
  Static factory designed to expose `pageshow` events to event handlers that are not necessarily instances of Window.
PERSISTENT → const int
  Indicates that file system data cannot be cleared unless given user permission.
popStateEvent → const EventStreamProvider<PopStateEvent>
  Static factory designed to expose `popstate` events to event handlers that are not necessarily instances of Window.
progressEvent → const EventStreamProvider<Event>
storageEvent → const EventStreamProvider<StorageEvent>
  Static factory designed to expose `storage` events to event handlers that are not necessarily instances of Window.
TEMPORARY → const int
  Indicates that file system data can be cleared at any time.
unloadEvent → const EventStreamProvider<Event>
  Static factory designed to expose `unload` events to event handlers that are not necessarily instances of Window.