description

# WindowBase class Null safety

Top-level container for a browser tab or window.

In a web browser, a WindowBase object represents any browser window. This object contains the window's state and its relation to other windows, such as which window opened this window.

Note: This class represents any window, while Window is used to access the properties and content of the current window or tab.

## See also

- Window

## Other resources

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

Implemented types
  - EventTarget
Implementers
  - Window

## Constructors

WindowBase()

## Properties

closed → bool?
  Indicates whether this window has been closed. [...]
  read-only
hashCode → int
  The hash code for this object. [...]
  read-only, inherited
history → HistoryBase
  The current session history for this window. [...]
  read-only
location → LocationBase
  The current location of this window. [...]
  read-only
on → Events
  This is an ease-of-use accessor for event streams which should only be used when an explicit accessor is not available.
  read-only, inherited
opener → WindowBase?
  A reference to the window that opened this one. [...]
  read-only
parent → WindowBase?
  A reference to the parent of this window. [...]
  read-only
runtimeType → Type
  A representation of the runtime type of the object.
  read-only, inherited
top → WindowBase?
  A reference to the topmost window in the window hierarchy. [...]
  read-only

## Methods

addEventListener(String type, EventListener? listener, [bool? useCapture]) → void
  inherited
close() → void
  Closes the window. [...]
dispatchEvent(Event event) → bool
  inherited
noSuchMethod(Invocation invocation) → dynamic
  Invoked when a non-existent method or property is accessed. [...]
  inherited
postMessage(dynamic message, String targetOrigin, [List<MessagePort>? messagePorts]) → void
  Sends a cross-origin message. [...]
removeEventListener(String type, EventListener? listener, [bool? useCapture]) → void
  inherited
toString() → String
  Returns a string representation of this object.
  inherited

## Operators

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