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Window

The Window interface represents a window containing a DOM document; the document property points to the DOM document loaded in that window. A window for a given document can be obtained using the document.defaultView property.

A global variable, window, representing the window in which the script is running, is exposed to JavaScript code.

The Window interface is home to a variety of functions, namespaces, objects, and constructors which are not necessarily directly associated with the concept of a user interface window. However, the Window interface is a suitable place to include these items that need to be globally available. Many of these are documented in the JavaScript Reference and the DOM Reference.

In a tabbed browser, each tab is represented by its own Window object; the global window seen by JavaScript code running within a given tab always represents the tab in which the code is running. That said, even in a tabbed browser, some properties and methods still apply to the overall window that contains the tab, such as resizeTo() and innerHeight. Generally, anything that can't reasonably pertain to a tab pertains to the window instead.

Properties

This interface inherits properties from the EventTarget interface and implements properties from the WindowOrWorkerGlobalScope and WindowEventHandlers mixins.

Note that properties which are objects (e.g.,. for overriding the prototype of built-in elements) are listed in a separate section below.

Window.closed Read only: This property indicates whether the current window is closed or not.
Window.console Read only: Returns a reference to the console object which provides access to the browser's debugging console.
Window.content and Window._content Read only: Returns a reference to the content element in the current window. Since Firefox 57 (initially Nightly-only), both versions are only available from chrome (privileged) code, and not available to the web anymore.
Window.controllers Read only: Returns the XUL controller objects for the current chrome window.
Window.customElements Read only: returns a reference to the CustomElementRegistry object, which can be used to register new custom elements and get information about previously registered custom elements.
Window.crypto Read only: Returns the browser crypto object.
Window.defaultStatus Obsolete since Gecko 23: Gets/sets the status bar text for the given window.
Window.devicePixelRatio Read only: Returns the ratio between physical pixels and device independent pixels in the current display.
Window.dialogArguments Read only: 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 Read only: Returns a reference to the document that the window contains.
Window.DOMMatrix Read only: Returns a reference to a DOMMatrix object, which represents 4x4 matrices, suitable for 2D and 3D operations.
Window.DOMMatrixReadOnly Read only: Returns a reference to a DOMMatrixReadOnly object, which represents 4x4 matrices, suitable for 2D and 3D operations.
Window.DOMPoint Read only: Returns a reference to a DOMPoint object, which represents a 2D or 3D point in a coordinate system.
Window.DOMPointReadOnly Read only: Returns a reference to a DOMPointReadOnly object, which represents a 2D or 3D point in a coordinate system.
Window.DOMQuad Read only: Returns a reference to a DOMQuad object, which provides represents a quadrilaterial object, that is one having four corners and four sides.
Window.DOMRect Read only: Returns a reference to a DOMRect object, which represents a rectangle.
Window.DOMRectReadOnly Read only: Returns a reference to a DOMRectReadOnly object, which represents a rectangle.
Window.event Read only: Returns the current event, which is the event currently being handled by the JavaScript code's context, or undefined if no event is currently being handled. The Event object passed directly to event handlers should be used instead whenever possible.
Window.frameElement Read only: Returns the element in which the window is embedded, or null if the window is not embedded.
Window.frames Read only: 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 Obsolete since 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 Read only: Returns a reference to the history object.
Window.innerHeight Read only: Gets the height of the content area of the browser window including, if rendered, the horizontal scrollbar.
Window.innerWidth Read only: Gets the width of the content area of the browser window including, if rendered, the vertical scrollbar.
Window.isSecureContext Read only: Indicates whether a context is capable of using features that require secure contexts.
Window.length Read only: 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 Read only: Returns the locationbar object, whose visibility can be toggled in the window.
Window.localStorage Read only: 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 Read only: Returns the menubar object, whose visibility can be toggled in the window.
Window.messageManager: Returns the message manager object for this window.
Window.mozAnimationStartTime Read only: The time in milliseconds since epoch at which the current animation cycle began. Use Animation.startTime instead.
Window.mozInnerScreenX Read only: 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 Read only: 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 Read only: 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 Read only: Returns a reference to the navigator object.
Window.opener: Returns a reference to the window that opened this current window.
Window.orientation Read only: Returns the orientation in degrees (in 90 degree increments) of the viewport relative to the device's natural orientation.
Window.outerHeight Read only: Gets the height of the outside of the browser window.
Window.outerWidth Read only: Gets the width of the outside of the browser window.
Window.pageXOffset Read only: An alias for window.scrollX.
Window.pageYOffset Read only: An alias for window.scrollY
Window.parent Read only: Returns a reference to the parent of the current window or subframe.
Window.performance Read only: Returns a Performance object, which includes the timing and navigation attributes, each of which is an object providing performance-related data. See also Using Navigation Timing for additional information and examples.
Window.personalbar Read only: Returns the personalbar object, whose visibility can be toggled in the window.
Window.pkcs11 Obsolete since Gecko 29: Formerly provided access to install and remove PKCS11 modules.
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 Read only: Returns a reference to the screen object associated with the window.
Window.screenX and Window.screenLeft Read only: Both properties return the horizontal distance from the left border of the user's browser viewport to the left side of the screen.
Window.screenY and Window.screenTop Read only: Both properties return the vertical distance from the top border of the user's browser viewport to the top side of the screen.
Window.scrollbars Read only: Returns the scrollbars object, whose visibility can be toggled in the window.
Window.scrollMaxX Read only: The maximum offset that the window can be scrolled to horizontally, that is the document width minus the viewport width.
Window.scrollMaxY Read only: The maximum offset that the window can be scrolled to vertically (i.e., the document height minus the viewport height).
Window.scrollX Read only: Returns the number of pixels that the document has already been scrolled horizontally.
Window.scrollY Read only: Returns the number of pixels that the document has already been scrolled vertically.
Window.self Read only: Returns an object reference to the window object itself.
Window.sessionStorage: Returns a reference to the session storage object used to store data that may only be accessed by the origin that created it.
Window.sidebar Read only: Returns a reference to the window object of the sidebar.
Window.speechSynthesis Read only: Returns a SpeechSynthesis object, which is the entry point into using Web Speech API speech synthesis functionality.
Window.status: Gets/sets the text in the statusbar at the bottom of the browser.
Window.statusbar Read only: Returns the statusbar object, whose visibility can be toggled in the window.
Window.toolbar Read only: Returns the toolbar object, whose visibility can be toggled in the window.
Window.top Read only: Returns a reference to the topmost window in the window hierarchy. This property is read only.
Window.visualViewport Read only: Returns a VisualViewport object which represents the visual viewport for a given window.
Window.window Read only: 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.

Properties implemented from elsewhere

WindowOrWorkerGlobalScope.caches Read only: Returns the CacheStorage object associated with the current context. This object enables functionality such as storing assets for offline use, and generating custom responses to requests.
WindowOrWorkerGlobalScope.indexedDB Read only: Provides a mechanism for applications to asynchronously access capabilities of indexed databases; returns an IDBFactory object.
WindowOrWorkerGlobalScope.isSecureContext Read only: Returns a boolean indicating whether the current context is secure (true) or not (false).
WindowOrWorkerGlobalScope.origin Read only: Returns the global object's origin, serialized as a string. (This does not yet appear to be implemented in any browser.)

Methods

This interface inherits methods from the EventTarget interface and implements methods from WindowOrWorkerGlobalScope and EventTarget.

Window.alert(): Displays an alert dialog.
Window.back(): Moves back one in the window history. This method is obsolete; you should instead use window.history.back().
Window.blur(): Sets focus away from the window.
Window.cancelAnimationFrame(): Enables you to cancel a callback previously scheduled with Window.requestAnimationFrame.
Window.cancelIdleCallback(): Enables you to cancel a callback previously scheduled with Window.requestIdleCallback.
Window.captureEvents(): Registers the window to capture all events of the specified type.
Window.clearImmediate(): Cancels the repeated execution set using setImmediate.
Window.close(): Closes the current window.
Window.confirm(): Displays a dialog with a message that the user needs to respond to.
Window.disableExternalCapture() Obsolete since Gecko 24
Window.dispatchEvent(): Used to trigger an event.
Window.dump(): Writes a message to the console.
Window.enableExternalCapture() Obsolete since Gecko 24
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. This method is obsolete; you should instead use window.history.forward().
Window.getAttention(): Flashes the application icon.
Window.getAttentionWithCycleCount()
Window.getComputedStyle(): Gets computed style for the specified element. Computed style indicates the computed values of all CSS properties of the element.
Window.getDefaultComputedStyle(): 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()
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.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.
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.releaseEvents(): Releases the window from trapping events of a specific type.
Window.requestAnimationFrame(): Tells the browser that an animation is in progress, requesting that the browser schedule a repaint of the window for the next animation frame.
Window.requestIdleCallback(): Enables the scheduling of tasks during a browser's idle periods.
Window.resizeBy(): Resizes the current window by a certain amount.
Window.resizeTo(): Dynamically resizes window.
Window.restore()
Window.routeEvent() Obsolete since Gecko 24
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() (top-level XUL windows only): Changes the cursor for the current window
Window.setImmediate(): Executes a function after the browser has finished other heavy tasks
Window.setResizable(): Toggles a user's ability to resize a window.
Window.sizeToContent(): Sizes the window according to its content.
Window.stop(): This method stops window loading.
Window.updateCommands(): Updates the state of commands of the current chrome window (UI).

Methods implemented from elsewhere

EventTarget.addEventListener(): Register an event handler to a specific event type on the window.
WindowOrWorkerGlobalScope.atob(): Decodes a string of data which has been encoded using base-64 encoding.
WindowOrWorkerGlobalScope.btoa(): Creates a base-64 encoded ASCII string from a string of binary data.
WindowOrWorkerGlobalScope.clearInterval(): Cancels the repeated execution set using WindowOrWorkerGlobalScope.setInterval().
WindowOrWorkerGlobalScope.clearTimeout(): Cancels the delayed execution set using WindowOrWorkerGlobalScope.setTimeout().
WindowOrWorkerGlobalScope.createImageBitmap(): Accepts a variety of different image sources, and returns a Promise which resolves to an ImageBitmap. Optionally the source is cropped to the rectangle of pixels originating at (sx, sy) with width sw, and height sh.
WindowOrWorkerGlobalScope.fetch(): Starts the process of fetching a resource from the network.
EventTarget.removeEventListener: Removes an event listener from the window.
WindowOrWorkerGlobalScope.setInterval(): Schedules a function to execute every time a given number of milliseconds elapses.
WindowOrWorkerGlobalScope.setTimeout(): Schedules a function to execute in a given amount of time.

Obsolete methods

Window.showModalDialog(): Displays a modal dialog. This method was removed completely in Chrome 43, and Firefox 55.

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.

This interface inherits event handlers from the EventTarget interface and implements event handlers from WindowEventHandlers.

Note: Starting in Gecko 9.0, you can now use the syntax if ("onabort" in window) to determine whether or not a given event handler property exists. This is because event handler interfaces have been updated to be proper web IDL interfaces. See DOM event handlers for details.

Window.onappinstalled: Called when the page is installed as a webapp. See appinstalled event.
Window.onbeforeinstallprompt: An event handler property dispatched before a user is prompted to save a web site to a home screen on mobile.
Window.ondevicelight: An event handler property for any ambient light levels changes
Window.ondevicemotion: Called if accelerometer detects a change (For mobile devices)
Window.ondeviceorientation: Called when the orientation is changed (For mobile devices)
Window.ondeviceorientationabsolute Chrome only: An event handler property for any device orientation changes.
Window.ondeviceproximity: An event handler property for device proximity event
Window.ongamepadconnected: Represents an event handler that will run when a gamepad is connected (when the gamepadconnected event fires).
Window.ongamepaddisconnected: Represents an event handler that will run when a gamepad is disconnected (when the gamepaddisconnected event fires).
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.onrejectionhandled: An event handler for handled Promise rejection events.
Window.onuserproximity: An event handler property for user proximity events.
Window.onvrdisplayconnect: Represents an event handler that will run when a compatible VR device has been connected to the computer (when the vrdisplayconnected event fires).
Window.onvrdisplaydisconnect: Represents an event handler that will run when a compatible VR device has been disconnected from the computer (when the vrdisplaydisconnected event fires).
Window.onvrdisplayactivate: Represents an event handler that will run when a display is able to be presented to (when the vrdisplayactivate event fires), for example if an HMD has been moved to bring it out of standby, or woken up by being put on.
Window.onvrdisplaydeactivate: Represents an event handler that will run when a display can no longer be presented to (when the vrdisplaydeactivate event fires), for example if an HMD has gone into standby or sleep mode due to a period of inactivity.
Window.onvrdisplayblur: Represents an event handler that will run when presentation to a display has been paused for some reason by the browser, OS, or VR hardware (when the vrdisplayblur event fires) — for example, while the user is interacting with a system menu or browser, to prevent tracking or loss of experience.
Window.onvrdisplayfocus: Represents an event handler that will run when presentation to a display has resumed after being blurred (when the vrdisplayfocus event fires).
Window.onvrdisplaypresentchange: represents an event handler that will run when the presenting state of a VR device changes — i.e. goes from presenting to not presenting, or vice versa (when the vrdisplaypresentchange event fires).

Event handlers implemented from elsewhere

GlobalEventHandlers.onabort: Called when the loading of a resource has been aborted, such as by a user canceling the load while it is still in progress
WindowEventHandlers.onafterprint: Called when the print dialog box is closed. See afterprint event.
WindowEventHandlers.onbeforeprint: Called when the print dialog box is opened. See beforeprint event.
WindowEventHandlers.onbeforeunload: An event handler property for before-unload events on the window.
GlobalEventHandlers.onblur: Called after the window loses focus, such as due to a popup.
GlobalEventHandlers.onchange: An event handler property for change events on the window.
GlobalEventHandlers.onclick: Called after the ANY mouse button is pressed & released
GlobalEventHandlers.ondblclick: Called when a double click is made with ANY mouse button.
GlobalEventHandlers.onclose: Called after the window is closed
GlobalEventHandlers.oncontextmenu: Called when the RIGHT mouse button is pressed
GlobalEventHandlers.onerror: Called when a resource fails to load OR when an error occurs at runtime. See error event.
GlobalEventHandlers.onfocus: Called after the window receives or regains focus. See focus events.
WindowEventHandlers.onhashchange: An event handler property for hashchange events on the window; called when the part of the URL after the hash mark ("#") changes.
GlobalEventHandlers.oninput: Called when the value of an <input> element changes
GlobalEventHandlers.onkeydown: Called when you begin pressing ANY key. See keydown event.
GlobalEventHandlers.onkeypress: Called when a key (except Shift, Fn, and CapsLock) is in pressed position. See keypress event.
GlobalEventHandlers.onkeyup: Called when you finish releasing ANY key. See keyup event.
WindowEventHandlers.onlanguagechange: An event handler property for languagechange events on the window.
GlobalEventHandlers.onload: Called after all resources and the DOM are fully loaded. WILL NOT get called when the page is loaded from cache, such as with back button.
WindowEventHandlers.onmessage: Is an EventHandler representing the code to be called when the message event is raised.
GlobalEventHandlers.onmousedown: Called when ANY mouse button is pressed.
GlobalEventHandlers.onmousemove: Called continously when the mouse is moved inside the window.
GlobalEventHandlers.onmouseout: Called when the pointer leaves the window.
GlobalEventHandlers.onmouseover: Called when the pointer enters the window
GlobalEventHandlers.onmouseup: Called when ANY mouse button is released
WindowEventHandlers.onoffline: Called when network connection is lost. See offline event.
WindowEventHandlers.ononline: Called when network connection is established. See online event.
WindowEventHandlers.onpagehide: Called when the user navigates away from the page, before the onunload event. See pagehide event.
WindowEventHandlers.onpageshow: Called after all resources and the DOM are fully loaded. See pageshow event.
WindowEventHandlers.onpopstate: Called when a back button is pressed.
GlobalEventHandlers.onreset: Called when a form is reset
GlobalEventHandlers.onresize: Called continuously as you are resizing the window.
GlobalEventHandlers.onscroll: Called when the scroll bar is moved via ANY means. If the resource fully fits in the window, then this event cannot be invoked
GlobalEventHandlers.onwheel: Called when the mouse wheel is rotated around any axis
GlobalEventHandlers.onselect: Called after text in an input field is selected
GlobalEventHandlers.onselectionchange: Is an EventHandler representing the code to be called when the selectionchange event is raised.
WindowEventHandlers.onstorage: Called when there is a change in session storage or local storage. See storage event
GlobalEventHandlers.onsubmit: Called when a form is submitted
WindowEventHandlers.onunhandledrejection: An event handler for unhandled Promise rejection events.
WindowEventHandlers.onunload: Called when the user navigates away from the page.

Constructors

Interfaces

See DOM Reference

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	1	12	1	Yes	Yes	Yes
`alert`	Yes Yes Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes	Yes	Yes	Yes Yes Starting with Opera 53, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes
`blur`	Yes	Yes	Yes	Yes	Yes	Yes
`confirm`	Yes Yes Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes	Yes	Yes	Yes Yes In Opera, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes
`cancelAnimationFrame`	Yes	Yes	23 23 11 — 23 Prefixed Prefixed Implemented with the vendor prefix: moz	10	15	6.1 6.1 6 — 6.1 Prefixed Prefixed Implemented with the vendor prefix: webkit
`cancelIdleCallback`	47	No	55 55 53 Disabled Disabled From version 53: this feature is behind the `dom.requestIdleCallback.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	No	Yes	No
`clearImmediate`	No	?	No	Yes	No	No
`close`	Yes	Yes	Yes Yes Starting in Firefox 46.0.1, `Window.close()` can no longer close windows that weren't opened by the same script. This is a security precaution.	Yes	Yes	Yes
`focus`	Yes	Yes	Yes	Yes	Yes	Yes
`ondevicelight`	No	Yes	22 — 60	No	No	No
`convertPointFromNodeToPage`	Yes	Yes	6	?	?	Yes Yes Uses the non-standard name: `webkitConvertPointFromNodeToPage`
`convertPointFromPageToNode`	50 50 For absolute values, use `ondeviceorientationabsolute`. 7 — 50 Provided absolute values, not relative.	Yes	6 6 3.6 — 6 Uses the non-standard name: `onmozorientation`	?	?	Yes Yes Uses the non-standard name: `webkitConvertPointFromPageToNode`
`ondeviceorientationabsolute`	50	?	No	?	?	?
`ondeviceproximity`	No	?	? — 60	No	No	No
`ongamepadconnected`	35 35 21 — 35 Prefixed Prefixed Implemented with the vendor prefix: webkit	Yes	29	No	22 22 15 — 22 Prefixed Prefixed Implemented with the vendor prefix: webkit	10.1
`ongamepaddisconnected`	35 35 21 — 35 Prefixed Prefixed Implemented with the vendor prefix: webkit	Yes	29	No	22 22 15 — 22 Prefixed Prefixed Implemented with the vendor prefix: webkit	10.1
`onpaint`	No	?	No	?	?	?
`onuserproximity`	No	?	Yes	No	No	No
`onvrdisplayactivate`	No	No	55	No	No	No
`onvrdisplayblur`	No	No	No	No	No	No
`onvrdisplayconnect`	No Disabled No Disabled Disabled This feature is behind the `WebVR` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	?	63 63 Only Windows and macOS support is enabled. 55 Only Windows support is enabled.	No	No	No
`onvrdisplaydeactivate`	No	No	55	No	No	No
`onvrdisplaydisconnect`	No Disabled No Disabled Disabled This feature is behind the `WebVR` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	?	63 63 Only Windows and macOS support is enabled. 55 Only Windows support is enabled.	No	No	No
`onvrdisplayfocus`	No	No	No	No	No	No
`onvrdisplaypresentchange`	65 Disabled 65 Disabled Disabled From version 65: this feature is behind the `WebVR` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	?	63 63 Only Windows and macOS support is enabled. 55 Only Windows support is enabled.	No	No	No
`crypto`	37	12	34	11 Prefixed 11 Prefixed Prefixed Implemented with the vendor prefix: ms	24	6.1
`customElements`	54	No No Under consideration	63 63 59 Disabled Disabled From version 59: this feature is behind the `dom.webcomponents.customelements.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. ? — 59 Disabled Disabled Until version 59 (exclusive): this feature is behind the `dom.webcomponents.enabled` preference (needs to be set to `true`) and the `dom.webcomponents.customelements.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	No	41	10.1
`devicePixelRatio`	Yes	Yes	49	11	41	9.1
`dialogArguments`	?	?	?	?	?	?
`document`	Yes	Yes	Yes	Yes	Yes	Yes
`event`	Yes	Yes	64	Yes	Yes	Yes
`frameElement`	Yes	Yes	1	Yes	Yes	Yes
`frames`	Yes	Yes	Yes	Yes	Yes	Yes
`fullScreen`	No	?	3	No	?	?
`getAttention`	No	No	No	No	No	No
`getAttentionWithCycleCount`	No	No	No	No	No	No
`getComputedStyle`	Yes	Yes	Yes Yes Before version 62 this function returned `null` when called on a Window with no presentation (e.g. an iframe with `display: none;` set). Since 62 it returns a `CSSStyleDeclaration` object with `length` 0, containing empty strings (bug 1467722; also see bug 1471231 for further work).	9	Yes	Yes
`getDefaultComputedStyle`	No	No	19	No	No	No
`getSelection`	Yes	Yes	Yes	9	Yes	Yes
`globalStorage`	No	?	? — 13	?	?	?
`history`	Yes	?	Yes	?	?	?
`home`	No	?	1	No	Yes	No
`innerHeight`	1	Yes	1 1 4 — 24 This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188.	9	9	3
`innerWidth`	1	Yes	1 1 4 — 24 This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188.	9	9	3
`isSecureContext`	Yes	Yes	49	?	?	?
`length`	Yes	?	Yes	?	?	?
`localStorage`	4	Yes	3.5	8	10.5	4
`location`	Yes	Yes	Yes Yes Before Firefox 57, single quotes contained in URLs were escaped when accessed via URL APIs. See bug 1386683.	Yes	Yes	Yes
`locationbar`	Yes	?	?	?	?	?
`matchMedia`	9	Yes	6	10	12.1	5.1
`maximize`	No	?	No	?	?	?
`menubar`	Yes	?	Yes	?	?	?
`minimize`	No	?	No	?	?	?
`moveBy`	Yes	?	Yes	?	?	?
`moveTo`	Yes	?	Yes	?	?	?
`mozAnimationStartTime`	No	No	No	No	No	No
`mozInnerScreenX`	No	No	Yes	No	No	No
`mozInnerScreenY`	No	No	Yes	No	No	No
`mozPaintCount`	No	No	No	No	No	No
`name`	Yes	?	Yes	?	?	?
`navigator`	Yes	?	Yes	?	?	?
`onappinstalled`	Yes	?	49 Disabled 49 Disabled Disabled From version 49: this feature is behind the `dom.manifest.onappinstall` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	?	?	?
`onbeforeinstallprompt`	?	?	?	?	?	?
`ondevicemotion`	?	?	?	?	?	?
`ondeviceorientation`	?	?	?	?	?	?
`open`	Yes	Yes	Yes	Yes	?	?
`openDialog`	No	?	No	?	?	?
`opener`	Yes	?	Yes	?	?	?
`orientation`	No	?	No	?	?	?
`outerHeight`	1	Yes	1	9	9	3
`outerWidth`	1	Yes	1	9	9	3
`pageXOffset`	Yes	Yes	Yes	9	Yes	Yes
`pageYOffset`	Yes	Yes	Yes	9	Yes	Yes
`parent`	Yes	?	Yes	?	?	?
`performance`	6	Yes	7	9	15	8
`personalbar`	Yes	?	Yes	?	?	?
`pkcs11`	No	?	? — 29	?	?	?
`postMessage`	1	Yes	8 8 Supports sending `File` and `FileList` objects between windows. This is only allowed if the recipient's principal is contained within the sender's principal for security reasons. 6 The `message` parameter is serialized using the structured clone algorithm. This means you can pass a broad variety of data objects safely to the destination window without having to serialize them yourself. ? — 6 The `message` parameter must be a string.	10 10 IE10 had an important limitation: see this article for details. 8 — 10 Support only for `<frame>` and `<iframe>`.	9.5	4
`print`	Yes Yes Starting with Chrome 46.0 this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	?	Yes	?	?	?
`prompt`	Yes Yes Starting with Chrome 46.0 this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	?	Yes	Yes Yes This function has no effect in the Modern UI/Metro version of Internet Explorer for Windows 8. It does not display a prompt to the user, and always returns `undefined`. It is not clear whether this is a bug or intended behavior. Desktop versions of IE do implement this function.	?	?
`releaseEvents`	Yes	?	Yes	?	?	?
`requestAnimationFrame`	24 24 10 Prefixed Prefixed Implemented with the vendor prefix: webkit	Yes	23 23 Callback parameter is a `DOMHighResTimestamp`. This means ten microsecond precision and zero time as `performance.now()`. 11 — 42 Prefixed Prefixed Implemented with the vendor prefix: moz Callback parameter is a `DOMTimestamp`. This means millisecond precision and zero time as `Date.now()`. 4 — 11 Prefixed Prefixed Implemented with the vendor prefix: moz Could be called with no input parameters.	10	15 15 Yes Prefixed Prefixed Implemented with the vendor prefix: o	6.1 6.1 6 Prefixed Prefixed Implemented with the vendor prefix: webkit
`requestFileSystem`	13 Prefixed 13 Prefixed Prefixed Implemented with the vendor prefix: webkit	Yes	No	No	No	No
`requestIdleCallback`	47	No	55 55 Enabled by default. 53 — 55 Implemented but disabled by default.	No	34	No
`resizeBy`	Yes	?	Yes Yes Since Firefox 7, it's no longer possible for a web site to change the default size of a window in a browser if the window wasn’t created by `window.open` or contains more than one tab. See here for more details.	?	?	?
`resizeTo`	Yes	?	Yes Yes Since Firefox 7, it's no longer possible for a web site to change the default size of a window in a browser if the window wasn’t created by `window.open` or contains more than one tab. See here for more details.	?	?	?
`restore`	No	?	No	?	?	?
`returnValue`	No	?	No	?	?	?
`routeEvent`	No	?	No	?	?	?
`screen`	Yes	?	Yes	?	?	?
`screenX`	Yes	Yes	Yes Yes Before Firefox 28, Gecko was using device pixels instead of CSS pixels; in other words, it was assuming a value of `screenPixelsPerCSSPixel` of 1 for any device.	Yes	Yes	Yes
`screenY`	Yes	Yes	Yes Yes Before Firefox 28, Gecko was using device pixels instead of CSS pixels; in other words, it was assuming a value of `screenPixelsPerCSSPixel` of 1 for any device.	Yes	Yes	Yes
`scroll`	Yes	Yes	Yes	?	?	Yes
`scrollbars`	Yes	?	Yes	?	?	Yes
`scrollBy`	Yes	Partial Partial Only `scrollBy(x-coord, y-coord)` is supported.	Yes	11 11 Only `scrollBy(x-coord, y-coord)` is supported.	?	Yes
`scrollByLines`	No	?	Yes	?	?	No
`scrollByPages`	No	?	Yes	?	?	No
`scrollMaxX`	No	?	Yes	?	?	No
`scrollMaxY`	No	?	Yes	?	?	?
`scrollTo`	Yes	Yes	Yes	Yes	Yes	Yes
`scrollX`	Yes Yes Yes Uses the non-standard name: `pageXOffset`	Yes Yes Yes Uses the non-standard name: `pageXOffset`	Yes Yes Yes Uses the non-standard name: `pageXOffset`	No No 9 Uses the non-standard name: `pageXOffset`	Yes Yes Yes Uses the non-standard name: `pageXOffset`	Yes Yes Yes Uses the non-standard name: `pageXOffset`
`scrollY`	Yes Yes Yes Uses the non-standard name: `pageYOffset`	Yes Yes Yes Uses the non-standard name: `pageYOffset`	Yes Yes Yes Uses the non-standard name: `pageYOffset`	No No 9 Uses the non-standard name: `pageYOffset`	Yes Yes Yes Uses the non-standard name: `pageYOffset`	Yes Yes Yes Uses the non-standard name: `pageYOffset`
`self`	Yes	Yes	Yes	Yes	Yes	Yes
`sessionStorage`	5	Yes	2	8	10.5	4
`setCursor`	No	?	No	?	?	?
`setImmediate`	No	Yes	No	10	No	No
`setResizable`	No	?	Yes	?	?	?
`showModalDialog`	? — 43	No	3 — 56	4	No	5.1 5.1 See WebKit bug 151885 for possible future removal from Safari.
`sidebar`	No	?	Yes	?	?	?
`sizeToContent`	No	?	Yes Yes 20 The mimimal size is clamped to prevent the window from being too small for the user to interact with.	?	?	?
`speechSynthesis`	33	Yes	49	No	?	7
`status`	Yes	?	Yes	?	?	?
`statusbar`	Yes	?	Yes	?	?	?
`stop`	Yes	?	Yes	No	?	?
`toolbar`	Yes	?	Yes	?	?	?
`top`	Yes	Yes	Yes Yes Starting in Firefox 6, this property is read only, as defined by the standard.	Yes	Yes	Yes
`updateCommands`	No	?	Yes	?	?	?
`visualViewport`	60	?	63 Disabled 63 Disabled Disabled From version 63: this feature is behind the `dom.visualviewport.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	?	47	?
`window`	Yes	?	Yes	?	?	?

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes	18	12	4	Yes	Yes	Yes
`alert`	Yes Yes Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes Yes Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes	Yes	Yes Yes Starting with Opera 53, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes	Yes
`blur`	Yes	Yes	Yes	Yes	Yes	Yes	Yes
`confirm`	Yes Yes Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes Yes Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes	Yes	Yes Yes In Opera, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Yes	Yes
`cancelAnimationFrame`	Yes	Yes	Yes	23 23 14 — 23 Prefixed Prefixed Implemented with the vendor prefix: moz	33	7.1	?
`cancelIdleCallback`	47	47	?	55 55 53 Disabled Disabled From version 53: this feature is behind the `dom.requestIdleCallback.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	?	No	?
`clearImmediate`	No	?	?	No	No	No	?
`close`	Yes	Yes	Yes	Yes Yes Starting in Firefox 46.0.1, `Window.close()` can no longer close windows that weren't opened by the same script. This is a security precaution.	Yes	Yes	?
`focus`	Yes	Yes	Yes	Yes	Yes	Yes	Yes
`ondevicelight`	No	No	?	15	No	No	?
`convertPointFromNodeToPage`	Yes	Yes	Yes	6	No	Yes	?
`convertPointFromPageToNode`	50 50 For absolute values, use `ondeviceorientationabsolute`. ? — 50 Provided absolute values, not relative.	50 50 For absolute values, use `ondeviceorientationabsolute`. ? — 50 Provided absolute values, not relative.	Yes	6 6 4 — 6 Uses the non-standard name: `onmozorientation`	No	Yes	?
`ondeviceorientationabsolute`	50	50	?	No	?	?	?
`ondeviceproximity`	No	No	?	15	No	No	?
`ongamepadconnected`	?	?	Yes	32	No	No	Yes
`ongamepaddisconnected`	?	?	Yes	32	No	No	Yes
`onpaint`	Yes	No	?	No	?	?	?
`onuserproximity`	No	No	?	15 — 60	No	No	?
`onvrdisplayactivate`	No	No	No	55	No	No	No
`onvrdisplayblur`	No	No	No	No	No	No	No
`onvrdisplayconnect`	?	Yes Yes Chrome for Android 56 supports only Google Daydream View. Chrome for Android 57 adds support for Google Cardboard.	?	55	No	No	Yes Yes Supported on Samsung Internet for GearVR.
`onvrdisplaydeactivate`	No	No	No	55	No	No	No
`onvrdisplaydisconnect`	?	56 56 Chrome for Android 56 supports only Google Daydream View. Chrome for Android 57 adds support for Google Cardboard.	?	55	No	No	Yes Yes Supported on Samsung Internet for GearVR.
`onvrdisplayfocus`	No	No	No	No	No	No	No
`onvrdisplaypresentchange`	?	56 56 Chrome for Android 56 supports only Google Daydream View. Chrome for Android 57 adds support for Google Cardboard.	?	55	No	No	Yes Yes Supported on Samsung Internet for GearVR.
`crypto`	37	37	12	34	24	6.1	Yes
`customElements`	54	54	No No Under consideration	63 63 59 Disabled Disabled From version 59: this feature is behind the `dom.webcomponents.customelements.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. ? — 59 Disabled Disabled Until version 59 (exclusive): this feature is behind the `dom.webcomponents.enabled` preference (needs to be set to `true`) and the `dom.webcomponents.customelements.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	41	10.1	?
`devicePixelRatio`	Yes	Yes	Yes	?	Yes	9.3	?
`dialogArguments`	?	?	?	?	?	?	?
`document`	Yes	Yes	Yes	Yes	Yes	Yes	Yes
`event`	?	Yes	Yes	64	Yes	Yes	?
`frameElement`	?	?	Yes	Yes	?	?	?
`frames`	Yes	Yes	Yes	Yes	Yes	Yes	Yes
`fullScreen`	?	No	?	?	?	?	?
`getAttention`	No	No	No	No	No	No	?
`getAttentionWithCycleCount`	No	No	No	No	No	No	?
`getComputedStyle`	Yes	Yes	Yes	Yes Yes Before version 62 this function returned `null` when called on a Window with no presentation (e.g. an iframe with `display: none;` set). Since 62 it returns a `CSSStyleDeclaration` object with `length` 0, containing empty strings (bug 1467722; also see bug 1471231 for further work).	Yes	Yes	?
`getDefaultComputedStyle`	No	No	No	19	No	No	?
`getSelection`	?	?	Yes	55 55 No support for selection events.	37	5.1 5.1 No support for selection start.	?
`globalStorage`	No	No	?	No	?	?	?
`history`	Yes	Yes	?	Yes	?	?	?
`home`	No	No	?	?	?	No	?
`innerHeight`	Yes	Yes	Yes	4 4 4 — 24 This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188.	9	3	?
`innerWidth`	Yes	Yes	Yes	4 4 4 — 24 This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188.	9	3	?
`isSecureContext`	Yes	Yes	Yes	49	?	?	?
`length`	Yes	Yes	?	Yes	?	?	?
`localStorage`	Yes	Yes	Yes	Yes	11	3.2	?
`location`	Yes	Yes	Yes	Yes Yes Before Firefox 57, single quotes contained in URLs were escaped when accessed via URL APIs. See bug 1386683.	Yes	Yes	?
`locationbar`	Yes	Yes	?	?	?	?	?
`matchMedia`	?	?	Yes	6	12.1	5	?
`maximize`	No	No	?	No	?	?	?
`menubar`	Yes	Yes	?	Yes	?	?	?
`minimize`	No	No	?	No	?	?	?
`moveBy`	Yes	Yes	?	Yes	?	?	?
`moveTo`	Yes	Yes	?	Yes	?	?	?
`mozAnimationStartTime`	No	No	No	No	No	No	No
`mozInnerScreenX`	No	No	No	Yes	No	No	No
`mozInnerScreenY`	No	No	No	Yes	No	No	No
`mozPaintCount`	No	No	No	No	No	No	No
`name`	Yes	Yes	?	Yes	?	?	?
`navigator`	Yes	Yes	?	Yes	?	?	?
`onappinstalled`	?	Yes	?	49 Disabled 49 Disabled Disabled From version 49: this feature is behind the `dom.manifest.onappinstall` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	?	?	?
`onbeforeinstallprompt`	?	?	?	?	?	?	?
`ondevicemotion`	?	?	?	?	?	?	?
`ondeviceorientation`	?	?	?	?	?	?	?
`open`	Yes	Yes	?	Yes	?	?	?
`openDialog`	No	No	?	No	?	?	?
`opener`	Yes	Yes	?	Yes	?	?	?
`orientation`	No	No	?	No	?	?	?
`outerHeight`	Yes	Yes	Yes	4	9	3	?
`outerWidth`	Yes	Yes	Yes	4	9	3	?
`pageXOffset`	?	Yes	Yes	Yes	?	?	?
`pageYOffset`	?	Yes	Yes	Yes	?	?	?
`parent`	Yes	Yes	?	Yes	?	?	?
`performance`	Yes	Yes	Yes	7	15	9	?
`personalbar`	Yes	Yes	?	Yes	?	?	?
`pkcs11`	No	No	?	? — 29	?	?	?
`postMessage`	Yes	Yes	Yes	8 8 Supports sending `File` and `FileList` objects between windows. This is only allowed if the recipient's principal is contained within the sender's principal for security reasons. 6 The `message` parameter is serialized using the structured clone algorithm. This means you can pass a broad variety of data objects safely to the destination window without having to serialize them yourself. ? — 6 The `message` parameter must be a string.	Yes	Yes Yes For security reasons, to work properly on Safari, construct using `document.getElementById('your-frame').contentWindow`.	?
`print`	Yes	Yes	?	Yes	?	?	?
`prompt`	Yes	Yes	?	Yes	?	?	?
`releaseEvents`	Yes	Yes	?	Yes	?	?	?
`requestAnimationFrame`	Yes	25 25 18 Prefixed Prefixed Implemented with the vendor prefix: webkit	Yes	23 23 14 — 42 Prefixed Prefixed Implemented with the vendor prefix: moz	15	7.1 7.1 6.1 Prefixed Prefixed Implemented with the vendor prefix: webkit	?
`requestFileSystem`	?	Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit	Yes	No	No	No	?
`requestIdleCallback`	47	47	No	55 55 Enabled by default. 53 — 55 Implemented but disabled by default.	?	No	?
`resizeBy`	Yes	Yes	?	Yes	?	?	?
`resizeTo`	Yes	Yes	?	Yes	?	?	?
`restore`	No	No	?	No	?	?	?
`returnValue`	No	No	?	No	?	?	?
`routeEvent`	No	No	?	No	?	?	?
`screen`	Yes	Yes	?	Yes	?	?	?
`screenX`	Yes	Yes	Yes	Yes Yes Before Firefox 28, Gecko was using device pixels instead of CSS pixels; in other words, it was assuming a value of `screenPixelsPerCSSPixel` of 1 for any device.	Yes	Yes	?
`screenY`	Yes	Yes	Yes	Yes Yes Before Firefox 28, Gecko was using device pixels instead of CSS pixels; in other words, it was assuming a value of `screenPixelsPerCSSPixel` of 1 for any device.	Yes	Yes	?
`scroll`	Yes	Yes	?	Yes	?	Yes	?
`scrollbars`	Yes	Yes	?	Yes	?	Yes	?
`scrollBy`	Yes	Yes	?	Yes	?	Yes	?
`scrollByLines`	No	No	?	Yes	?	No	?
`scrollByPages`	No	No	?	Yes	?	No	?
`scrollMaxX`	No	No	?	Yes	?	No	?
`scrollMaxY`	No	No	?	Yes	?	?	?
`scrollTo`	Yes	Yes	Yes	Yes	?	Yes	Yes
`scrollX`	Yes Yes Yes Uses the non-standard name: `pageXOffset`	Yes Yes Yes Uses the non-standard name: `pageXOffset`	Yes Yes Yes Uses the non-standard name: `pageXOffset`	Yes Yes Yes Uses the non-standard name: `pageXOffset`	? ? ? Uses the non-standard name: `pageXOffset`	? ? ? Uses the non-standard name: `pageXOffset`	? ? ? Uses the non-standard name: `pageXOffset`
`scrollY`	Yes Yes Yes Uses the non-standard name: `pageYOffset`	Yes Yes Yes Uses the non-standard name: `pageYOffset`	Yes Yes Yes Uses the non-standard name: `pageYOffset`	Yes Yes Yes Uses the non-standard name: `pageYOffset`	? ? ? Uses the non-standard name: `pageYOffset`	Yes Yes ? Uses the non-standard name: `pageYOffset`	? ? ? Uses the non-standard name: `pageYOffset`
`self`	Yes	Yes	Yes	Yes	Yes	Yes	?
`sessionStorage`	Yes	Yes	Yes	Yes	11	3.2	?
`setCursor`	No	No	?	No	?	?	?
`setImmediate`	No	No	Yes	No	No	No	?
`setResizable`	No	No	?	Yes	?	?	?
`showModalDialog`	No	No	No	No	No	No	No
`sidebar`	No	No	?	Yes	?	?	?
`sizeToContent`	No	No	?	Yes Yes This method has no effect as a page is always in a tab.	?	?	?
`speechSynthesis`	?	Yes	Yes	No	No	7.1	?
`status`	Yes	Yes	?	Yes	?	?	?
`statusbar`	Yes	Yes	?	Yes	?	?	?
`stop`	Yes	Yes	?	Yes	?	?	?
`toolbar`	Yes	Yes	?	Yes	?	?	?
`top`	?	?	Yes	?	?	?	?
`updateCommands`	No	No	?	Yes	?	?	?
`visualViewport`	60	60	?	63 Disabled 63 Disabled Disabled From version 63: this feature is behind the `dom.visualviewport.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	47	?	?
`window`	Yes	Yes	?	Yes	?	?	?