window

This section provides a brief reference for all of the methods, properties, and events available through the DOM window object. The window object implements the Window interface, which in turn inherits from the AbstractView interface. Some additional global functions, namespaces objects, and constructors, not typically associated with the window, but available on it, are listed in the JavaScript Reference.

The window object represents the window itself. The document property of a window points to the DOM document loaded in that window. A window for a given document can be obtained using the document.defaultView property.

In a tabbed browser, such as Firefox, each tab contains its own window object (and if you're writing an extension, the browser window itself is a separate window too - see Working with windows in chrome code for more information). That is, the window object is not shared between tabs in the same window. Some methods, namely window.resizeTo and window.resizeBy apply to the whole window and not to the specific tab the window object belongs to. Generally, anything that can't reasonably pertain to a tab pertains to the window instead.

プロパティ

window.applicationCache

An OfflineResourceList object providing access to the offline resources for the window.

window.closed

This property indicates whether the current window is closed or not.

window.Components

The entry point to many XPCOM features. Some properties, e.g. classes, are only available to sufficiently privileged code.

window.console

Returns a reference to the console object providing access to the browser's debugging console.

window.content and window._content

Returns a reference to the content element in the current window. The variant with underscore is deprecated.

window.controllers

Returns the XUL controller objects for the current chrome window.

window.crypto

Returns the browser crypto object.

window.defaultStatus 廃止 Gecko 23

Gets/sets the status bar text for the given window.

window.dialogArguments

Gets the arguments passed to the window (if it's a dialog box) at the time window.showModalDialog() was called. This is an nsIArray.

window.directories

Synonym of window.personalbar

window.document

Returns a reference to the document that the window contains.

window.frameElement

Returns the element in which the window is embedded, or null if the window is not embedded.

window.frames

Returns an array of the subframes in the current window.

window.fullScreen

This property indicates whether the window is displayed in full screen or not.

window.globalStorage 廃止 Gecko 13

Unsupported since Gecko 13 (Firefox 13). Use window.localStorage instead.
Was: Multiple storage objects that are used for storing data across multiple pages.

window.history

Returns a reference to the history object.

window.innerHeight

Gets the height of the content area of the browser window including, if rendered, the horizontal scrollbar.

window.innerWidth

Gets the width of the content area of the browser window including, if rendered, the vertical scrollbar.

window.length

Returns the number of frames in the window. See also window.frames.

window.location

Gets/sets the location, or current URL, of the window object.

window.locationbar

Returns the locationbar object, whose visibility can be toggled in the window.

window.localStorage

Returns a reference to the local storage object used to store data that may only be accessed by the origin that created it.

window.menubar

Returns the menubar object, whose visibility can be toggled in the window.

window.messageManager

Returns the message manager object for this window.

window.mozAnimationStartTime

The time in milliseconds since epoch at which the current animation cycle began.

window.mozInnerScreenX

Returns the horizontal (X) coordinate of the top-left corner of the window's viewport, in screen coordinates. This value is reported in CSS pixels. See mozScreenPixelsPerCSSPixel in nsIDOMWindowUtils for a conversion factor to adapt to screen pixels if needed.

window.mozInnerScreenY

Returns the vertical (Y) coordinate of the top-left corner of the window's viewport, in screen coordinates. This value is reported in CSS pixels. See mozScreenPixelsPerCSSPixel for a conversion factor to adapt to screen pixels if needed.

window.mozPaintCount

Returns the number of times the current document has been rendered to the screen in this window. This can be used to compute rendering performance.

window.name

Gets/sets the name of the window.

window.navigator

Returns a reference to the navigator object.

window.opener

Returns a reference to the window that opened this current window.

window.outerHeight

Gets the height of the outside of the browser window.

window.outerWidth

Gets the width of the outside of the browser window.

window.pageXOffset

An alias for window.scrollX.

window.pageYOffset

An alias for window.scrollY

window.parent

Returns a reference to the parent of the current window or subframe.

window.performance

Provides a hosting area for performance related attributes.

window.personalbar

Returns the personalbar object, whose visibility can be toggled in the window.

window.pkcs11

Formerly provided access to install and remove PKCS11 modules. Now this property is always null.

window.returnValue

The return value to be returned to the function that called window.showModalDialog() to display the window as a modal dialog.

window.screen

Returns a reference to the screen object associated with the window.

window.screen.availTop

Specifies the y-coordinate of the first pixel that is not allocated to permanent or semipermanent user interface features.

window.screen.availLeft

Returns the first available pixel available from the left side of the screen.

window.screen.availHeight

Specifies the height of the screen, in pixels, minus permanent or semipermanent user interface features displayed by the operating system, such as the Taskbar on Windows.

window.screen.availWidth

Returns the amount of horizontal space in pixels available to the window.

window.screen.colorDepth

Returns the color depth of the screen.

window.screen.height

Returns the height of the screen in pixels.

window.screen.left

Returns the current distance in pixels from the left side of the screen.

window.screen.pixelDepth

Gets the bit depth of the screen.

window.screen.top

Returns the distance from the top of the screen.

window.screen.width

Returns the width of the screen.

window.screenX

Returns the horizontal distance of the left border of the user's browser from the left side of the screen.

window.screenY

Returns the vertical distance of the top border of the user's browser from the top side of the screen.

window.scrollbars

Returns the scrollbars object, whose visibility can be toggled in the window.

window.scrollMaxX

The maximum offset that the window can be scrolled to horizontally.

(i.e., the document width minus the viewport width)

window.scrollMaxY

The maximum offset that the window can be scrolled to vertically (i.e., the document height minus the viewport height).

window.scrollX

Returns the number of pixels that the document has already been scrolled horizontally.

window.scrollY

Returns the number of pixels that the document has already been scrolled vertically.

window.self

Returns an object reference to the window object itself.

window.sessionStorage

A storage object for storing data within a single page session.

window.sidebar

Returns a reference to the window object of the sidebar.

window.status

Gets/sets the text in the statusbar at the bottom of the browser.

window.statusbar

Returns the statusbar object, whose visibility can be toggled in the window.

window.toolbar

Returns the toolbar object, whose visibility can be toggled in the window.

window.top

Returns a reference to the topmost window in the window hierarchy. This property is read only.

window.URL

A DOM URL object, which provides the window.URL.createObjectURL() and window.URL.revokeObjectURL() methods.

window.window

Returns a reference to the current window.

window[0], window[1], etc.

Returns a reference to the window object in the frames. See window.frames for more details.

メソッド

window.addEventListener

Register an event handler to a specific event type on the window.

window.alert

Displays an alert dialog.

window.atob

Decodes a string of data which has been encoded using base-64 encoding.

window.back

Moves back one in the window history.

window.blur

Sets focus away from the window.

window.btoa

Creates a base-64 encoded ASCII string from a string of binary data.

window.captureEvents 廃止 Gecko 24

Registers the window to capture all events of the specified type.

window.clearImmediate

Cancels the repeated execution set using setImmediate.

window.clearInterval

Cancels the repeated execution set using setInterval.

window.clearTimeout

Cancels the repeated execution set using setTimeout.

window.close

Closes the current window.

window.confirm

Displays a dialog with a message that the user needs to respond to.

window.disableExternalCapture 廃止 Gecko 24

FIXME: NeedsContents

window.dispatchEvent

FIXME: NeedsContents

window.dump

Writes a message to the console.

window.enableExternalCapture 廃止 Gecko 24

FIXME: NeedsContents

window.escape

Encodes a string.

window.find

Searches for a given string in a window.

window.focus

Sets focus on the current window.

window.forward

Moves the window one document forward in the history.

window.GeckoActiveXObject

FIXME: NeedsContents

window.getAttention

Flashes the application icon.

window.getAttentionWithCycleCount

FIXME: NeedsContents

window.getComputedStyle

Gets computed style for the specified element. Computed style indicates the computed values of all CSS properties of the element.

window.getDefaulComputedStyle

Gets default computed style for the specified element, ignoring author stylesheets.

window.getSelection

Returns the selection object representing the selected item(s).

window.home

Returns the browser to the home page.

window.matchMedia

Returns a MediaQueryList object representing the specified media query string.

window.maximize

FIXME: NeedsContents

window.minimize (top-level XUL windows only)

Minimizes the window.

window.moveBy

Moves the current window by a specified amount.

window.moveTo

Moves the window to the specified coordinates.

window.mozRequestAnimationFrame

Tells the browser that an animation is in progress, requesting that the browser schedule a repaint of the window for the next animation frame. This will cause a MozBeforePaint event to fire before that repaint occurs.

window.open

Opens a new window.

window.openDialog

Opens a new dialog window.

window.postMessage

Provides a secure means for one window to send a string of data to another window, which need not be within the same domain as the first, in a secure manner.

window.print

Opens the Print Dialog to print the current document.

window.prompt

Returns the text entered by the user in a prompt dialog.

window.QueryInterface

FIXME: NeedsContents

window.releaseEvents 廃止 Gecko 24

Releases the window from trapping events of a specific type.

window.removeEventListener

Removes an event listener from the window.

window.resizeBy

Resizes the current window by a certain amount.

window.resizeTo

Dynamically resizes window.

window.restore

FIXME: NeedsContents

window.routeEvent 廃止 Gecko 24

FIXME: NeedsContents

window.scroll

Scrolls the window to a particular place in the document.

window.scrollBy

Scrolls the document in the window by the given amount.

window.scrollByLines

Scrolls the document by the given number of lines.

window.scrollByPages

Scrolls the current document by the specified number of pages.

window.scrollTo

Scrolls to a particular set of coordinates in the document.

window.setCursor

Changes the cursor for the current window

window.setImmediate

Execute a function after the browser has finished other heavy tasks

window.setInterval

Execute a function each X milliseconds.

window.setResizable

FIXME: NeedsContents

window.setTimeout

Sets a delay for executing a function.

window.showModalDialog

Displays a modal dialog.

window.sizeToContent

Sizes the window according to its content.

window.stop

This method stops window loading.

window.unescape

Unencodes a value that has been encoded in hexadecimal (e.g. a cookie).

window.updateCommands

Updates the state of commands of the current chrome window (UI).

window.XPCNativeWrapper

FIXME: NeedsContents

window.XPCSafeJSObjectWrapper

Event handlers

These are properties of the window object that can be set to establish event handlers for the various things that can happen in the window that might be of interest.

window.onabort

An event handler property for abort events on the window.

window.onbeforeunload

An event handler property for before-unload events on the window.

window.onblur

An event handler property for blur events on the window.

window.onchange

An event handler property for change events on the window.

window.onclick

An event handler property for click events on the window.

window.onclose

An event handler property for handling the window close event.

window.oncontextmenu

An event handler property for right-click events on the window.

window.ondevicelight

An event handler property for any ambient light levels changes

window.ondevicemotion

FIXME: NeedsContents

window.ondeviceorientation

FIXME: NeedsContents

window.ondeviceproximity

An event handler property for device proximity event

window.ondragdrop

An event handler property for drag and drop events on the window.

window.onerror

An event handler property for errors raised on the window.

window.onfocus

An event handler property for focus events on the window.

window.onhashchange

An event handler property for hash change events on the window; called when the part of the URL after the hash mark ("#") changes.

window.onkeydown

An event handler property for keydown events on the window.

window.onkeypress

An event handler property for keypress events on the window.

window.onkeyup

An event handler property for keyup events on the window.

window.onload

An event handler property for window loading.

window.onmousedown

An event handler property for mousedown events on the window.

window.onmousemove

An event handler property for mousemove events on the window.

window.onmouseout

An event handler property for mouseout events on the window.

window.onmouseover

An event handler property for mouseover events on the window.

window.onmouseup

An event handler property for mouseup events on the window.

window.onmozbeforepaint

An event handler property for the MozBeforePaint event, which is sent before repainting the window if the event has been requested by a call to the window.mozRequestAnimationFrame() method.

window.onpaint

An event handler property for paint events on the window.

window.onpopstate

An event handler property for popstate events, which are fired when navigating to a session history entry representing a state object.

window.onreset

An event handler property for reset events on the window.

window.onresize

An event handler property for window resizing.

window.onscroll

An event handler property for window scrolling.

window.onselect

An event handler property for window selection.

window.onsubmit

An event handler property for submits on window forms.

window.onunload

An event handler property for unload events on the window.

window.onuserproximity

An event handler property for user proximity events

window.onpageshow

An event handler property for pageshow events on the window.

window.onpagehide

An event handler property for pagehide events on the window.

コンストラクタ

Image

Used for creating an HTMLImageElement.

Option

Used for creating an HTMLOptionElement

Worker

Used for creating a Web worker

関連情報

• Working with windows in chrome code