JSDoc: Class: Window

Constructor

new Window(options, callbackopt, errorCallbackopt)

Creates a new Window.

Best practice is to invoke with the new operand. See the window.constructor tutorial for an example. Failure to use the new operand will result in a console warning (but will otherwise succeed).

Parameters:

Name	Type	Attributes	Description
`options`	fin.desktop.Window~options		Window creation options. See options for more details.
`callback`	successCallback	<optional>	Called if the method succeeds. See success callback for shape.
`errorCallback`	errorCallback	<optional>	Called if there is a network error. See error callback for shape.

Tutorials:

window.constructor

Methods

(static) getCurrent() → {fin.desktop.Window}

Returns an instance of the current window.

Tutorials:

window.getCurrent

Returns:

Type: fin.desktop.Window

(static) wrap(appUuid, windowName) → {fin.desktop.Window}

Returns a Window object that wraps an existing window.

Parameters:

Name	Type	Description
`appUuid`	string	The UUID of the application to which the window to be wrapped belongs.
`windowName`	string	The name of the window to be wrapped.

Tutorials:

window.wrap

Returns:

Type: fin.desktop.Window

addEventListener(type, listener, callbackopt, errorCallbackopt)

Registers an event listener on the specified event.

Parameters:

Name	Type	Attributes	Description
`type`	string		The type of the event.
`listener`	function		Called whenever an event of the specified type occurs. It is passed an event object containing information related to the event.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.addEventListener

animate(transitions, options, callbackopt, errorCallbackopt)

Performs the specified window transitions.

Parameters:

Name	Type	Attributes	Description
`transitions`	object		Describes the animations to preform. See the tutorial.
`options`	object		Options for the animation. See the tutorial.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.animate

authenticate(userName, password, callbackopt, errorCallbackopt)

Provides credentials to authentication requests

Parameters:

Name	Type	Attributes	Description
`userName`	string		userName to provide to the authentication challange
`password`	string		password to provide to the authentication challange
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.authenticate

blur(callbackopt, errorCallbackopt)

Removes focus from the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.blur

bringToFront(callbackopt, errorCallbackopt)

Brings the window to the front of the window stack.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.bringToFront

close(forceopt, callbackopt, errorCallbackopt)

Closes the window.

Parameters:

Name	Type	Attributes	Default	Description
`force`	boolean	<optional>	false	Close will be prevented from closing when force is false and ‘close-requested’ has been subscribed to for application’s main window.
`callback`	function	<optional>		called if the method succeeds.
`errorCallback`	function	<optional>		called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.close

disableFrame(callbackopt, errorCallbackopt)

Prevents a user from changing a window's size/position when using the window's frame.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.disableFrame

enableFrame(callbackopt, errorCallbackopt)

Re-enables user changes to a window's size/position when using the window's frame.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.enableFrame

executeJavaScript(code, callbackopt, errorCallbackopt)

Executes Javascript on the window, restricted to windows you own or windows owned by applications you have created.

Parameters:

Name	Type	Attributes	Description
`code`	string		JavaScript code to be executed on the window.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.executeJavaScript

flash(options, callbackopt, errorCallbackopt)

Flashes the window’s frame and taskbar icon until stopFlashing is called.

Parameters:

Name	Type	Attributes	Description
`options`	object		Configuration parameters of the flash.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.flash

focus(callbackopt, errorCallbackopt)

Gives focus to the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.focus

getAllFrames(callbackopt, errorCallbackopt)

Retrieves an array of frame info objects representing the main frame and any iframes that are currently on the page.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.getAllFrames

getBounds(callbackopt, errorCallbackopt)

Gets the current bounds (top, left, width, height) of the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.getBounds

getGroup(callbackopt, errorCallbackopt)

Retrieves an array containing wrapped fin.desktop.Windows that are grouped with this window. If a window is not in a group an empty array is returned. Please note that calling window is included in the result array.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.getGroup

getInfo(callbackopt, errorCallbackopt) → {fin.desktop.Application#windowInfo}

Gets an information object for the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds. A windowInfo object is passed as an argument.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.getInfo

Returns:

Type: fin.desktop.Application#windowInfo

getNativeWindow() → {window}

Returns the native JavaScript "window" object for the window.

Tutorials:

window.getNativeWindow

Returns:

Type: window

getOptions(callbackopt, errorCallbackopt)

Gets the current settings of the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.getOptions

getParentApplication() → {fin.desktop.Application}

Gets the parent application.

Tutorials:

window.getParentApplication

Returns:

Type: fin.desktop.Application

getParentWindow() → {fin.desktop.Window}

Gets the parent window.

Tutorials:

window.getParentWindow

Returns:

Type: fin.desktop.Window

getSnapshot(callbackopt, errorCallbackopt)

Gets a base64 encoded PNG snapshot of the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.getSnapshot

getState(callbackopt, errorCallbackopt)

Gets the current state ("minimized", "maximized", or "restored") of the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.getState

getZoomLevel(callbackopt, errorCallbackopt)

Returns the zoom level of the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.getZoomLevel

hide(callbackopt, errorCallbackopt)

Hides the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.hide

isShowing(callbackopt, errorCallbackopt)

Determines if the window is currently showing.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.isShowing

joinGroup(target, callbackopt, errorCallbackopt)

Joins the same window group as the specified window.

Parameters:

Name	Type	Attributes	Description
`target`	fin.desktop.Window		The window whose group is to be joined.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.joinGroup

leaveGroup(callbackopt, errorCallbackopt)

Leaves the current window group so that the window can be move independently of those in the group.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.leaveGroup

maximize(callbackopt, errorCallbackopt)

Maximizes the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.maximize

mergeGroups(target, callbackopt, errorCallbackopt)

Merges the instance's window group with the same window group as the specified window

Parameters:

Name	Type	Attributes	Description
`target`	fin.desktop.Window		The window whose group is to be merged with.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.mergeGroups

minimize(callbackopt, errorCallbackopt)

Minimizes the window.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.minimize

moveBy(deltaLeft, deltaTop, callbackopt, errorCallbackopt)

Moves the window by a specified amount.

Parameters:

Name	Type	Attributes	Description
`deltaLeft`	int		The change in the left position of the window.
`deltaTop`	int		The change in the top position of the window.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.moveBy

moveTo(left, top, callbackopt, errorCallbackopt)

Moves the window to a specified location.

Parameters:

Name	Type	Attributes	Description
`left`	int		The left position of the window.
`top`	int		The top position of the window.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.moveTo

navigate(url, callbackopt, errorCallbackopt)

Navigates the window to a specified URL.

Parameters:

Name	Type	Attributes	Description
`url`	string		The URL to navigate the window to.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.navigate

navigateBack(callbackopt, errorCallbackopt)

Navigates the window back one page.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.navigateBack

navigateForward(callbackopt, errorCallbackopt)

Navigates the window forward one page.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.navigateForward

reload(ignoreCacheopt, callbackopt, errorCallbackopt)

Reloads the window current page.

Parameters:

Name	Type	Attributes	Default	Description
`ignoreCache`	boolean	<optional>	false	Specifies if the cache should be ignored during page reload.
`callback`	function	<optional>		called if the method succeeds.
`errorCallback`	function	<optional>		called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.reload

removeEventListener(type, listener, callbackopt, errorCallbackopt)

Removes a previously registered event listener from the specified event.

Parameters:

Name	Type	Attributes	Description
`type`	string		The type of the event
`listener`	function		Called whenever an event of the specified type occurs. It is passed an event object containing information related to the event.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.removeEventListener

resizeBy(deltaWidth, deltaHeight, anchor, callbackopt, errorCallbackopt)

Resizes the window by a specified amount.

Parameters:

Name	Type	Attributes	Description
`deltaWidth`	int		The change in the width of the window.
`deltaHeight`	int		The change in the height of the window.
`anchor`	string		Specifies a corner to remain fixed during the resize. Can take the values: "top-left", "top-right", "bottom-left", or "bottom-right." If undefined, the default is "top-left".
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.resizeBy

resizeTo(width, height, anchor, callbackopt, errorCallbackopt)

Resizes the window to the specified dimensions.

Parameters:

Name	Type	Attributes	Description
`width`	int		The change in the width of the window.
`height`	int		The change in the height of the window.
`anchor`	string		Specifies a corner to remain fixed during the resize. Can take the values: "top-left", "top-right", "bottom-left", or "bottom-right." If undefined, the default is "top-left".
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.resizeTo

restore(callbackopt, errorCallbackopt)

Restores the window to its normal state (i.e., unminimized, unmaximized).

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.restore

setAsForeground(callbackopt, errorCallbackopt)

Will bring the window to the front of the entire stack and give it focus.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.setAsForeground

setBounds(left, top, width, height, callbackopt, errorCallbackopt)

Sets the window's size and position.

Parameters:

Name	Type	Attributes	Description
`left`	int		The left position of the window.
`top`	int		The top position of the window.
`width`	int		The width of the window.
`height`	int		The height of the window.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.setBounds

setZoomLevel(level, callbackopt, errorCallbackopt)

Sets the zoom level of the window.

Parameters:

Name	Type	Attributes	Description
`level`	Number		The zoom level.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.setZoomLevel

show(forceopt, callbackopt, errorCallbackopt)

Shows the window if it is hidden.

Parameters:

Name	Type	Attributes	Default	Description
`force`	boolean	<optional>	false	Show will be prevented from closing when force is false and ‘show-requested’ has been subscribed to for application’s main window.
`callback`	function	<optional>		called if the method succeeds.
`errorCallback`	function	<optional>		called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.show

showAt(left, top, forceopt, callbackopt, errorCallbackopt)

Shows the window if it is hidden at the specified location. If the toggle parameter is set to true, the window will alternate between showing and hiding.

Parameters:

Name	Type	Attributes	Default	Description
`left`	int			The left position of the window.
`top`	int			The right position of the window.
`force`	boolean	<optional>	false	Show will be prevented from closing when force is false and ‘show-requested’ has been subscribed to for application’s main window.
`callback`	function	<optional>		called if the method succeeds.
`errorCallback`	function	<optional>		called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.showAt

stopFlashing(callbackopt, errorCallbackopt)

Stops the taskbar icon from flashing.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.stopFlashing

stopNavigation(callbackopt, errorCallbackopt)

Stops any current navigation the window is performing.

Parameters:

Name	Type	Attributes	Description
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.stopNavigation

updateOptions(options, callbackopt, errorCallbackopt)

Updates the window using the passed options

Parameters:

Name	Type	Attributes	Description
`options`	object		Changes a window's options that were defined upon creation. See tutorial.
`callback`	function	<optional>	called if the method succeeds.
`errorCallback`	function	<optional>	called if the method fails. The reason for failure is passed as an argument.

Tutorials:

window.updateOptions

Type Definitions

windowInfo

Object returned by fin.desktop.Window#getInfo.

Type:

object

Properties:

Name	Type	Description
`url`	string	Uniform Resource Locator of the currently loaded page.
`title`	string	Page title appearing in title bar of window. This will be the markup defined in the `<title>...</title>` element, or the internal name of the window if there is no such element.

options

Window creation options.

This is the options object required by the Window constructor.

Note that name is the only required property — albeit the url property is usually provided as well (defaults to "about:blank" when omitted).

This jsdoc typedef mirrors the WindowOptions TypeScript interface in @types/openfin.

Type:

object

Properties:

Name Type Attributes Default Description

accelerator

object

Enable keyboard shortcuts for devtools, zoom, reload, and reload ignoring cache.

Properties

Name	Type	Attributes	Default	Description
`devtools`	boolean	<optional>	false	If `true`, enables the devtools keyboard shortcut: `Ctrl` + `Shift` + `I` (Toggles Devtools)
`reload`	boolean	<optional>	false	If `true`, enables the reload keyboard shortcuts: `Ctrl` + `R` (Windows) `F5` (Windows) `Command` + `R` (Mac)
`reloadIgnoringCache`	boolean	<optional>	false	If `true`, enables the reload-from-source keyboard shortcuts: `Ctrl` + `Shift` + `R` (Windows) `Shift` + `F5` (Windows) `Command` + `Shift` + `R` (Mac)
`zoom`	boolean	<optional>	false	If `true`, enables the zoom keyboard shortcuts: `Ctrl` + `+` (Zoom In) `Ctrl` + `Shift` + `+` (Zoom In) `Ctrl` + `-` (Zoom Out) `Ctrl` + `Shift` + `-` (Zoom Out) `Ctrl` + `Scroll` (Zoom In & Out) `Ctrl` + `0` (Restore to 100%)

alwaysOnTop

boolean

false

Updatable. A flag to always position the window at the top of the window stack.

autoShow

boolean

false

A flag to automatically show the window when it is created.

backgroundColor

string

"#FFF"

The window’s backfill color as a hexadecimal value. Not to be confused with the content background color (document.body.style.backgroundColor), this color briefly fills a window’s (a) content area before its content is loaded as well as (b) newly exposed areas when growing a window. Setting this value to the anticipated content background color can help improve user experience. Default is white.

contentNavigation

object

Restrict navigation to URLs that match a whitelisted pattern. See here for more details.

Properties

Name	Type	Attributes	Default	Description
`whitelist`	Array.<string>	<optional>	[]	List of whitelisted URLs.

contextMenu

boolean

true

Updatable. A flag to show the context menu when right-clicking on a window. Gives access to the devtools for the window.

cornerRounding

object

Updatable. Defines and applies rounded corners for a frameless window. NOTE: On macOS corner is not ellipse but circle rounded by the average of height and width.

Properties

Name	Type	Attributes	Default	Description
`height`	number	<optional>	0	The height in pixels.
`width`	number	<optional>	0	The width in pixels.

customData

string

Updatable. A field that the user can attach serializable data to to be ferried around with the window options. When omitted, the default value of this property is the empty string ("").

customRequestHeaders

Array.<customRequestHeaders>

Defines list of customRequestHeaders for requests sent by the window.

defaultCentered

boolean

false

Centers the window in the primary monitor. This option overrides defaultLeft and defaultTop. When saveWindowState is true, this value will be ignored for subsequent launches in favor of the cached value. NOTE: On macOS defaultCenter is somewhat above center vertically.

defaultHeight

number

500

The default height of the window. When saveWindowState is true, this value will be ignored for subsequent launches in favor of the cached value.

defaultLeft

number

100

The default left position of the window. When saveWindowState is true, this value will be ignored for subsequent launches in favor of the cached value.

defaultTop

number

100

The default top position of the window. When saveWindowState is true, this value will be ignored for subsequent launches in favor of the cached value.

defaultWidth

number

800

The default width of the window. When saveWindowState is true, this value will be ignored for subsequent launches in favor of the cached value.

frame

boolean

true

Updatable. A flag to show the frame.

icon

string

Updatable. Inheritable. A URL for the icon to be shown in the window title bar and the taskbar. When omitted, inherits from the parent application.

maxHeight

number

-1

Updatable. The maximum height of a window. Will default to the OS defined value if set to -1.

maximizable

boolean

true

Updatable. A flag that lets the window be maximized.

maxWidth

number

-1

Updatable. The maximum width of a window. Will default to the OS defined value if set to -1.

minHeight

number

Updatable. The minimum height of a window.

minimizable

boolean

true

Updatable. A flag that lets the window be minimized.

minWidth

number

Updatable. The minimum width of a window.

name

string

The name of the window.

opacity

number

1.0

Updatable. A flag that specifies how transparent the window will be. This value is clamped between 0.0 and 1.0.

preloadScripts

Array.<preloadScript>

Inheritable A list of scripts that are eval'ed before other scripts in the page. When omitted, inherits from the parent application.

resizable

boolean

true

Updatable. A flag to allow the user to resize the window.

resizeRegion

object

Updatable. Defines a region in pixels that will respond to user mouse interaction for resizing a frameless window.

Properties

Name	Type	Attributes	Default	Description
`bottomRightCorner`	number	<optional>	9	The size in pixels of an additional square resizable region located at the bottom right corner of a frameless window.
`size`	number	<optional>	7	The size in pixels.
`sides`	object	<optional>	{top:true,right:true,bottom:true,left:true}	Sides that a window can be resized from.

saveWindowState

boolean

true

A flag to cache the location of the window.

shadow

boolean

false

A flag to display a shadow on frameless windows. shadow and cornerRounding are mutually exclusive. On Windows 7, Aero theme is required.

showTaskbarIcon

boolean

true

Updatable. Windows. A flag to show the window's icon in the taskbar.

smallWindow

boolean

false

A flag to specify a frameless window that can be be created and resized to less than 41x36px (width x height). Note: Caveats of small windows are no Aero Snap and drag to/from maximize.

state

string

"normal"

The visible state of the window on creation. One of:

"maximized"
"minimized"
"normal"

taskbarIconGroup

string

Windows. Specify a taskbar group for the window. If omitted, defaults to app's uuid (fin.desktop.Application.getCurrent().uuid).

url

string

"about:blank"

The URL of the window.

uuid

string

The uuid of the application, unique within the set of all Applications running in OpenFin Runtime. If omitted, defaults to the uuid of the application spawning the window. If given, must match the uuid of the application spawning the window. In other words, the application's uuid is the only acceptable value, but is the default, so there's really no need to provide it.

waitForPageLoad

boolean

true

By default (when set to true), the window will not appear until the window object's load event fires. When set to false, the window will appear immediately but will be empty. The user will experience a brief white flash until the content arrives and is rendered. This can be mitigated somewhat by setting the backgroundColor option to some other color compatible with the expected content.