Web/API/Window

The Window interface represents a window containing a [[../../../Glossary/DOM|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.

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  a:hover text { fill: #0095DD; pointer-events: all;}

Constructors

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.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.devicePixelRatio Read only: Returns the ratio between physical pixels and device independent pixels in the current display.
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.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.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.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.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.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.)

Deprecated properties

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.defaultStatus ': Gets/sets the status bar text for the given window.
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.globalStorage ' ': Multiple storage objects that were used for storing data across multiple pages.
Window.mozAnimationStartTime ' ': The time in milliseconds since epoch at which the current animation cycle began. Use Animation.startTime instead.
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.orientation Read only ': Returns the orientation in degrees (in 90 degree increments) of the viewport relative to the device's natural orientation.
Window.pkcs11 ': 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.

Methods

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

Window.alert(): Displays an alert dialog.
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.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.dump() ': Writes a message to the console.
Window.find(): Searches for a given string in a window.
Window.focus(): Sets focus on the current window.
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.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.open(): Opens a new 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.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.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.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.
EventTarget.dispatchEvent(): Used to trigger an event.
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.

Deprecated methods

Window.back() ' ': Moves back one in the window history. This method is deprecated; you should instead use window.history.back().
Window.captureEvents() ' ': Registers the window to capture all events of the specified type.
Window.forward() ' ': Moves the window one document forward in the history. This method is deprecated; you should instead use window.history.forward().
Window.getAttention() ' ': Flashes the application icon.
Window.home() ' ': Returns the browser to the home page.
Window.openDialog() ' ': Opens a new dialog window.
Window.releaseEvents() ' ': Releases the window from trapping events of a specific type.
Window.showModalDialog() ' ': Displays a modal dialog.

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.

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 ': 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.

Events

Listen to these events using addEventListener() or by assigning an event listener to the oneventname property of this interface.

error: Fired when a resource failed to load, or can't be used. For example, if a script has an execution error or an image can't be found or is invalid. Also available via the onerror property.
languagechange: Fired at the global scope object when the user's preferred language changes. Also available via the onlanguagechange property.
orientationchange: Fired when the orientation of the device has changed. Also available via the onorientationchange property.
devicemotion: Fired at a regular interval, indicating the amount of physical force of acceleration the device is receiving and the rate of rotation, if available.
deviceorientation: Fired when fresh data is available from the magnetometer orientation sensor about the current orientation of the device as compared to the Earth coordinate frame.
resize: Fired when the window has been resized. Also available via the onresize property.
storage: Fired when a storage area (localStorage or sessionStorage) has been modified in the context of another document. Also available via the onstorage property.

Animation events

animationcancel: Fired when an animation unexpectedly aborts. Also available via the onanimationcancel property.
animationend: Fired when an animation has completed normally. Also available via the onanimationend property.
animationiteration: Fired when an animation iteration has completed. Also available via the onanimationiteration property.
animationstart: Fired when an animation starts. Also available via the onanimationstart property.

Clipboard events

clipboardchange: Fired when the system clipboard content changes.
copy: Fired when the user initiates a copy action through the browser's user interface. Also available via the oncopy property.
cut: Fired when the user initiates a cut action through the browser's user interface. Also available via the oncut property.
paste: Fired when the user initiates a paste action through the browser's user interface. Also available via the onpaste property.

Connection events

offline: Fired when the browser has lost access to the network and the value of navigator.onLine has switched to false. Also available via the onoffline property.
online: Fired when the browser has gained access to the network and the value of navigator.onLine has switched to true. Also available via the ononline property.

Focus events

blur: Fired when an element has lost focus. Also available via the onblur property.
focus: Fired when an element has gained focus. Also available via the onfocus property

Gamepad events

gamepadconnected: Fired when the browser detects that a gamepad has been connected or the first time a button/axis of the gamepad is used. Also available via the ongamepadconnected property.
gamepaddisconnected: Fired when the browser detects that a gamepad has been disconnected. Also available via the ongamepaddisconnected property

History events

hashchange: Fired when the fragment identifier of the URL has changed (the part of the URL beginning with and following the # symbol). Also available via the onhashchange property.
pagehide: Sent when the browser hides the current document while in the process of switching to displaying in its place a different document from the session's history. This happens, for example, when the user clicks the Back button or when they click the Forward button to move ahead in session history. Also available through the onpagehide event handler property.
pageshow: Sent when the browser makes the document visible due to navigation tasks, including not only when the page is first loaded, but also situations such as the user navigating back to the page after having navigated to another within the same tab. Also available using the onpageshow event handler property.
popstate: Fired when the active history entry changes. Also available using the onpopstate event handler property.

Load & unload events

beforeunload: Fired when the window, the document and its resources are about to be unloaded. Also available via the onbeforeunload property.
DOMContentLoaded: Fired when the document has been completely loaded and parsed, without waiting for stylesheets, images, and subframes to finish loading.
load: Fired when the whole page has loaded, including all dependent resources such as stylesheets images. Also available via the onload property.
unload: Fired when the document or a child resource is being unloaded. Also available via the onunload property.

Manifest events

appinstalled: Fired when the browser has successfully installed a page as an application. Also available via the onappinstalled property.
beforeinstallprompt: Fired when a user is about to be prompted to install a web application. Also available via the onbeforeinstallprompt property.

Messaging events

message: Fired when the window receives a message, for example from a call to Window.postMessage() from another browsing context. Also available via the onmessage property.
messageerror: Fired when a Window object receives a message that can't be deserialized. Also available via the onmessageerror property.

Print events

afterprint: Fired after the associated document has started printing or the print preview has been closed. Also available via the onafterprint property.
beforeprint: Fired when the associated document is about to be printed or previewed for printing. Also available via the onbeforeprint property.

Promise rejection events

rejectionhandled: Sent every time a JavaScript Promise is rejected, regardless of whether or not there is a handler in place to catch the rejection. Also available through the onrejectionhandled event handler property.
unhandledrejection: Sent when a JavaScript Promise is rejected but there is no handler in place to catch the rejection. Also available using the onunhandledrejection event handler property.

Transition events

transitioncancel: Fired when a CSS transition is canceled. Also available via the ontransitioncancel property.
transitionend: Fired when a CSS transition has completed. Also available via the ontransitionend property.
transitionrun: Fired when a CSS transition is first created. Also available via the ontransitionrun property.
transitionstart: Fired when a CSS transition has actually started. Also available via the ontransitionstart property.

WebVR events

vrdisplayactivate: Fired when a VR display becomes available to be presented to, for example if an HMD has been moved to bring it out of standby, or woken up by being put on. Also available via the onvrdisplayactivate property.
vrdisplayblur: Fired when presentation to a VR display has been paused for some reason by the browser, OS, or VR hardware. Also available via the onvrdisplayblur property.
vrdisplayconnect: Fired when a compatible VR display is connected to the computer. Also available via the onvrdisplayconnect property.
vrdisplaydeactivate: Fired when a VR display can no longer be presented to, for example if an HMD has gone into standby or sleep mode due to a period of inactivity. Also available via the onvrdisplaydeactivate property.
vrdisplaydisconnect: Fired when a compatible VR display is disconnected from the computer. Also available via the onvrdisplaydisconnect property.
vrdisplayfocus: Fired when presentation to a VR display has resumed after being blurred. Also available via the onvrdisplayfocus property.
vrdisplaypresentchange: Fired when the presenting state of a VR display changes — i.e. goes from presenting to not presenting, or vice versa. Also available via the onvrdisplaypresentchange property.
vrdisplaypointerrestricted: Fired when the VR display's pointer input is restricted to consumption via a pointerlocked element. Also available via the onvrdisplaypointerrestricted property.
vrdisplaypointerunrestricted: Fired when the VR display's pointer input is no longer restricted to consumption via a pointerlocked element. Also available via the onvrdisplaypointerunrestricted property.

Interfaces

See DOM Reference.

Specifications

Specification
HTML Living StandardThe definition of 'Window' in that specification.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`Window`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`DOMContentLoaded` event	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support 9	Safari Full support 3.1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 2	Samsung Internet Android Full support 1.0
`OverconstrainedError` Experimental'	Chrome Full support 63	Edge Full support ≤79	Firefox ?	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support 63	Chrome Android Full support 63	Firefox Android ?	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support 8.0
`afterprint` event	Chrome Full support 63	Edge Full support 12	Firefox Full support 6	IE Full support Yes	Opera Full support 50	Safari Full support 13	WebView Android Full support 63	Chrome Android Full support 63	Firefox Android ?	Opera Android Full support 46	Safari iOS Full support 13	Samsung Internet Android Full support 8.0
`alert`	Chrome Full support 1 Notes' Full support 1 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 3 Notes' Full support 3 Notes' Notes' Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Safari Full support 1	WebView Android Full support 1 Notes' Full support 1 Notes' Notes' Starting with WebView 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Chrome Android Full support 18 Notes' Full support 18 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Firefox Android Full support 4	Opera Android Full support 10.1 Notes' Full support 10.1 Notes' Notes' Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Safari iOS Full support 1	Samsung Internet Android Full support 1.0 Notes' Full support 1.0 Notes' Notes' Starting with Samsung Internet 5.0, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.
`animationcancel` event	Chrome No support No	Edge No support No	Firefox Full support 54	IE ?	Opera No support No	Safari Full support 13.1 Full support 13.1 Full support 12 Disabled' Disabled' From version 12: this feature is behind the `Web Animations` preference and the `CSS Animations via Web Animations` preference.	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 54	Opera Android No support No	Safari iOS Full support 13.4 Full support 13.4 Full support 12 Disabled' Disabled' From version 12: this feature is behind the `Web Animations` preference and the `CSS Animations via Web Animations` preference.	Samsung Internet Android No support No
`animationend` event	Chrome Full support 43 Full support 43 Full support 1 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤79 Full support ≤79 Full support ≤79 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Full support Yes	IE ?	Opera ?	Safari Full support 9	WebView Android Full support 43 Full support 43 Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support 43 Full support 43 Full support 18 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support Yes	Opera Android ?	Safari iOS Full support 9	Samsung Internet Android Full support 4.0 Full support 4.0 Full support 1.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`animationiteration` event	Chrome Full support 43 Full support 43 Full support 1 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤79 Full support ≤79 Full support ≤79 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Full support 51	IE ?	Opera ?	Safari Full support 9	WebView Android Full support 43 Full support 43 Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support 43 Full support 43 Full support 18 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support 51	Opera Android ?	Safari iOS Full support 9	Samsung Internet Android Full support 4.0 Full support 4.0 Full support 1.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`animationstart` event	Chrome Full support 43 Full support 43 Full support 1 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤79 Full support ≤79 Full support ≤79 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Full support 51	IE ?	Opera ?	Safari Full support 9	WebView Android Full support 43 Full support 43 Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support 43 Full support 43 Full support 18 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support 51	Opera Android ?	Safari iOS Full support 9	Samsung Internet Android Full support 4.0 Full support 4.0 Full support 1.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`beforeprint` event	Chrome Full support 63	Edge Full support 12	Firefox Full support 6	IE Full support Yes	Opera Full support 50	Safari Full support 13	WebView Android Full support 63	Chrome Android Full support 63	Firefox Android ?	Opera Android Full support 46	Safari iOS Full support 13	Samsung Internet Android Full support 8.0
`beforeunload` event	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 12	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 12	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`blur`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`blur` event	Chrome Full support 5	Edge Full support 12	Firefox Full support Yes Full support Yes No support ? — 24 Notes' Notes' The interface for this event is `Event`, not `FocusEvent`.	IE Full support Yes	Opera Full support 12.1	Safari Full support 5.1	WebView Android Full support Yes	Chrome Android Full support 18	Firefox Android Full support Yes	Opera Android Full support 12.1	Safari iOS Full support 5.1	Samsung Internet Android Full support 1.0
`cancelAnimationFrame`	Chrome Full support 24	Edge Full support 12	Firefox Full support 23 Full support 23 No support 11 — 23 Prefixed' Prefixed' Implemented with the vendor prefix: moz	IE Full support 10	Opera Full support 15	Safari Full support 6.1 Full support 6.1 No support 6 — 6.1 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	WebView Android Full support ≤37	Chrome Android Full support 25	Firefox Android Full support 23 Full support 23 No support 14 — 23 Prefixed' Prefixed' Implemented with the vendor prefix: moz	Opera Android Full support 14	Safari iOS Full support 7	Samsung Internet Android Full support 1.5
`cancelIdleCallback` Experimental'	Chrome Full support 47	Edge Full support 79	Firefox Full support 55 Full support 55 Full support 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.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support 47	Chrome Android Full support 47	Firefox Android Full support 55 Full support 55 Full support 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.	Opera Android Full support Yes	Safari iOS No support No	Samsung Internet Android Full support 5.0
`clearImmediate` Non-standard'	Chrome No support No	Edge No support 12 — 79	Firefox No support No	IE Full support 10	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`clipboardchange` event Experimental'	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`close`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' 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.	IE Full support 4	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' 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.	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`confirm`	Chrome Full support 1 Notes' Full support 1 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 3 Notes' Full support 3 Notes' Notes' Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Safari Full support 1	WebView Android Full support 1 Notes' Full support 1 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Chrome Android Full support 18 Notes' Full support 18 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Firefox Android Full support 4	Opera Android Full support 10.1 Notes' Full support 10.1 Notes' Notes' Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Safari iOS Full support 1	Samsung Internet Android Full support 1.0 Notes' Full support 1.0 Notes' Notes' Starting with Samsung Internet 5.0, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.
`convertPointFromNodeToPage` Non-standard'	Chrome Full support Yes	Edge Full support ≤18	Firefox Full support 6	IE ?	Opera ?	Safari Full support Yes Alternate Name' Full support Yes Alternate Name' Alternate Name' Uses the non-standard name: `webkitConvertPointFromNodeToPage`	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android No support No	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`convertPointFromPageToNode` Non-standard'	Chrome Full support 50 Notes' Full support 50 Notes' Notes' For absolute values, use `ondeviceorientationabsolute`. No support 7 — 50 Notes' Notes' Provided absolute values, not relative.	Edge Full support ≤18	Firefox Full support 6 Full support 6 No support 3.6 — 6 Alternate Name' Alternate Name' Uses the non-standard name: `onmozorientation`	IE ?	Opera ?	Safari Full support Yes Alternate Name' Full support Yes Alternate Name' Alternate Name' Uses the non-standard name: `webkitConvertPointFromPageToNode`	WebView Android Full support 50 Notes' Full support 50 Notes' Notes' For absolute values, use `ondeviceorientationabsolute`. No support ? — 50 Notes' Notes' Provided absolute values, not relative.	Chrome Android Full support 50 Notes' Full support 50 Notes' Notes' For absolute values, use `ondeviceorientationabsolute`. No support ? — 50 Notes' Notes' Provided absolute values, not relative.	Firefox Android Full support 6 Full support 6 No support 4 — 6 Alternate Name' Alternate Name' Uses the non-standard name: `onmozorientation`	Opera Android No support No	Safari iOS Full support Yes	Samsung Internet Android Full support 5.0 Notes' Full support 5.0 Notes' Notes' For absolute values, use `ondeviceorientationabsolute`. No support ? — 5.0 Notes' Notes' Provided absolute values, not relative.
`copy` event	Chrome Full support 58	Edge Full support ≤18	Firefox Full support Yes	IE No support No	Opera Full support 45	Safari Full support Yes	WebView Android Full support 58	Chrome Android Full support 58	Firefox Android Full support Yes	Opera Android Full support 43	Safari iOS ?	Samsung Internet Android Full support 7.0
`crypto`	Chrome Full support 37	Edge Full support 12	Firefox Full support 34	IE Full support 11 Prefixed' Full support 11 Prefixed' Prefixed' Implemented with the vendor prefix: ms	Opera Full support 24	Safari Full support 6.1	WebView Android Full support 37	Chrome Android Full support 37	Firefox Android Full support 34	Opera Android Full support 24	Safari iOS Full support 6.1	Samsung Internet Android Full support 3.0
`customElements`	Chrome Full support 54	Edge Full support 79	Firefox Full support 63 Full support 63 No support 59 — 63 Disabled' Disabled' From version 59 until version 63 (exclusive): this feature is behind the `dom.webcomponents.customelements.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support ? — 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.	IE No support No	Opera Full support 41	Safari Full support 10.1	WebView Android Full support 54	Chrome Android Full support 54	Firefox Android Full support 63 Full support 63 No support 59 — 63 Disabled' Disabled' From version 59 until version 63 (exclusive): this feature is behind the `dom.webcomponents.customelements.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support ? — 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.	Opera Android Full support 41	Safari iOS Full support 10.3	Samsung Internet Android Full support 6.0
`cut` event	Chrome Full support 58	Edge Full support ≤18	Firefox Full support Yes	IE No support No	Opera Full support 45	Safari Full support Yes	WebView Android Full support 58	Chrome Android Full support 58	Firefox Android Full support Yes	Opera Android Full support 43	Safari iOS ?	Samsung Internet Android Full support 7.0
`devicemotion` event Experimental'	Chrome Full support Yes	Edge Full support ≤18	Firefox Full support 6	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android No support No	Safari iOS Full support 4.2	Samsung Internet Android Full support Yes
`deviceorientation` event	Chrome Full support 7	Edge Full support ≤18	Firefox Full support 6 Full support 6 No support 3.6 — 6 Alternate Name' Alternate Name' Uses the non-standard name: `mozOrientation`	IE ?	Opera Full support 12	Safari Full support Yes	WebView Android Full support 3	Chrome Android Full support 18	Firefox Android Full support 6 Full support 6 No support 4 — 6 Alternate Name' Alternate Name' Uses the non-standard name: `mozOrientation`	Opera Android Full support 12	Safari iOS Full support 4.2	Samsung Internet Android Full support 1.0
`devicePixelRatio`	Chrome Full support 1	Edge Full support 12	Firefox Full support 18	IE Full support 11	Opera Full support 11.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 18	Opera Android Full support 11.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`dialogArguments` Deprecated'Non-standard'	Chrome ?	Edge ?	Firefox ?	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android ?
`document`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`error` event	Chrome Full support Yes	Edge Full support ≤79	Firefox Full support Yes	IE ?	Opera ?	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support Yes
`event`	Chrome Full support 1	Edge Full support 12	Firefox Full support 66 Full support 66 Full support 63 Notes' Disabled' Notes' This was briefly enabled by default in 65, then removed again while related compatibility issues are sorted out (see bug 1520756). Disabled' From version 63: this feature is behind the `dom.window.event.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 4	Opera Full support 7	Safari Full support 1.1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 66 Full support 66 Full support 63 Notes' Disabled' Notes' This was briefly enabled by default in 65, then removed again while related compatibility issues are sorted out (see bug 1520756). Disabled' From version 63: this feature is behind the `dom.window.event.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`external` Deprecated'	Chrome Full support Yes	Edge Full support 12	Firefox Full support 2 Notes' Full support 2 Notes' Notes' From Firefox 78 `AddSearchProvider()` does nothing, as the specification requires.	IE Full support 4	Opera Full support 15	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' From Firefox for Android 79 `AddSearchProvider()` does nothing, as the specification requires.	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support Yes
`find` Experimental'Non-standard'	Chrome Full support 1	Edge Full support 79	Firefox Full support 1	IE No support No	Opera Full support 15	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 14	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`focus`	Chrome Full support 1 Notes' Full support 1 Notes' Notes' Starting in Chrome 66, opening a popup in fullscreen mode and calling this function will end fullscreen mode.	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`focus` event	Chrome Full support Yes	Edge Full support 12	Firefox Full support Yes Full support Yes No support ? — 24 Notes' Notes' The interface for this event is `Event`, not `FocusEvent`.	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`frameElement`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 5.5	Opera Full support ≤12.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`frames`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`fullScreen` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 3	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 4	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`gamepadconnected` event	Chrome Full support 35 Full support 35 No support 21 — 35 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤18	Firefox Full support 29	IE No support No	Opera Full support 22 Full support 22 No support 15 — 22 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Safari Full support 10.1	WebView Android Full support 37	Chrome Android Full support 37	Firefox Android Full support 32	Opera Android Full support Yes	Safari iOS No support No	Samsung Internet Android Full support 3.0
`gamepaddisconnected` event	Chrome Full support 35 Full support 35 No support 21 — 35 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤18	Firefox Full support 29	IE No support No	Opera Full support 22 Full support 22 No support 15 — 22 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Safari Full support 10.1	WebView Android Full support 37	Chrome Android Full support 37	Firefox Android Full support 32	Opera Android Full support Yes	Safari iOS No support No	Samsung Internet Android Full support 3.0
`getAttention` Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`getAttentionWithCycleCount` Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`getComputedStyle`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' 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).	IE Full support 9	Opera Full support 7.2	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' 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).	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`getDefaultComputedStyle` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 19	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 19	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`getSelection`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support 9	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`globalStorage` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox No support ? — 13	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`hashchange` event	Chrome Full support 5	Edge Full support 12	Firefox Full support 3.6	IE Full support 8	Opera Full support 10.6	Safari Full support 5	WebView Android Full support Yes	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 11	Safari iOS Full support 5	Samsung Internet Android Full support 1.0
`history`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`home` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 1	IE No support No	Opera Full support Yes	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android ?	Opera Android ?	Safari iOS No support No	Samsung Internet Android No support No
`innerHeight`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Full support 1 No support 4 — 24 Notes' Notes' This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188.	IE Full support 9	Opera Full support 9	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4 Full support 4 No support 4 — 24 Notes' Notes' This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188.	Opera Android Full support 10.1	Safari iOS Full support 1 Notes' Full support 1 Notes' Notes' This property returns the height of the visual viewport instead of the layout viewport. See this bug for details.	Samsung Internet Android Full support 1.0
`innerWidth`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Full support 1 No support 4 — 24 Notes' Notes' This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188.	IE Full support 9	Opera Full support 9	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4 Full support 4 No support 4 — 24 Notes' Notes' This property was buggy and could give a wrong value before page load in certain circumstances, see bug 641188.	Opera Android Full support 10.1	Safari iOS Full support 1 Notes' Full support 1 Notes' Notes' This property returns the width of the visual viewport instead of the layout viewport. See this bug for details.	Samsung Internet Android Full support 1.0
`isSecureContext`	Chrome Full support 47	Edge Full support 15	Firefox Full support 49	IE No support No	Opera Full support 34	Safari Full support 11.1	WebView Android Full support 47	Chrome Android Full support 47	Firefox Android Full support 49	Opera Android Full support 34	Safari iOS Full support 11.3	Samsung Internet Android Full support 5.0
`languagechange` event	Chrome Full support 37	Edge Full support ≤79	Firefox Full support 32	IE No support No	Opera Full support 24	Safari ?	WebView Android Full support 37	Chrome Android Full support 37	Firefox Android Full support 4	Opera Android Full support 24	Safari iOS ?	Samsung Internet Android Full support 4.0
`languagechange` event Experimental'	Chrome Full support 77	Edge Full support 80	Firefox No support No	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support 77	Chrome Android Full support 77	Firefox Android No support No	Opera Android Full support Yes	Safari iOS No support No	Samsung Internet Android Full support 12.0
`length`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`load` event	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 4	Safari Full support 1.3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`localStorage`	Chrome Full support 4	Edge Full support 12	Firefox Full support 3.5	IE Full support 8	Opera Full support 10.5	Safari Full support 4	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 11	Safari iOS Full support 3.2	Samsung Internet Android Full support 1.0
`location`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' Before Firefox 57, single quotes contained in URLs were escaped when accessed via URL APIs. See bug 1386683.	IE Full support 4	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' Before Firefox 57, single quotes contained in URLs were escaped when accessed via URL APIs. See bug 1386683.	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`locationbar`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE No support No	Opera Full support 15	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 14	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`matchMedia`	Chrome Full support 9	Edge Full support 12	Firefox Full support 6	IE Full support 10	Opera Full support 12.1	Safari Full support 5.1	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support 6	Opera Android Full support 12.1	Safari iOS Full support 5	Samsung Internet Android Full support 1.0
`maximize` Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`menubar`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE No support No	Opera Full support 15	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 14	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`message` event	Chrome Full support 60	Edge Full support ≤79	Firefox ?	IE ?	Opera Full support 47	Safari ?	WebView Android Full support 60	Chrome Android Full support 60	Firefox Android ?	Opera Android Full support 47	Safari iOS ?	Samsung Internet Android Full support 8.0
`messageerror` event	Chrome Full support 60	Edge Full support ≤79	Firefox Full support 57	IE ?	Opera Full support 47	Safari ?	WebView Android Full support 60	Chrome Android Full support 60	Firefox Android Full support 57	Opera Android Full support 47	Safari iOS ?	Samsung Internet Android Full support 8.0
`minimize` Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`moveBy`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`moveTo`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`mozAnimationStartTime` Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`mozInnerScreenX` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`mozInnerScreenY` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`mozPaintCount` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox No support 4 — 72	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 4	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`name`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' From Firefox 82, if a new page from another domain is loaded into a tab, then `window.name` is set to the empty string (the original string is restored if the tab reverts back to the original page). This change prevents some cross-site attacks. See bug 444222.	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' From Firefox 82, if a new page from another domain is loaded into a tab, then `window.name` is set to the empty string (the original string is restored if the tab reverts back to the original page). This change prevents some cross-site attacks. See bug 444222.	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`navigator`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`offline` event	Chrome Full support Yes	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`onappinstalled` Deprecated'Non-standard'	Chrome Full support 64	Edge Full support ≤79	Firefox No support 49 — 76 Disabled' No support 49 — 76 Disabled' Disabled' From version 49 until version 76 (exclusive): this feature is behind the `dom.manifest.onappinstall` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE ?	Opera No support No	Safari ?	WebView Android No support No	Chrome Android Full support 57	Firefox Android Full support 49 Disabled' Full support 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.	Opera Android No support No	Safari iOS ?	Samsung Internet Android Full support 7.0
`onbeforeinstallprompt` Non-standard'	Chrome Full support Yes	Edge Full support ≤79	Firefox No support No	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android No support No	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support Yes
`ondevicelight` Deprecated'Non-standard'	Chrome No support No	Edge No support 13 — 79	Firefox Full support 22	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 15	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`ondevicemotion`	Chrome Full support 31	Edge Full support 12	Firefox Full support 9	IE Full support 11	Opera Full support 18	Safari No support No	WebView Android Full support 4.4	Chrome Android Full support 31	Firefox Android Full support 9	Opera Android Full support 18	Safari iOS No support No	Samsung Internet Android Full support 2.0
`ondeviceorientation`	Chrome Full support 7	Edge Full support 12	Firefox Full support 9	IE Full support 11	Opera Full support 15	Safari No support No	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support 9	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android Full support 1.0
`ondeviceorientationabsolute` Non-standard'	Chrome Full support 50	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 37	Safari No support No	WebView Android Full support 50	Chrome Android Full support 50	Firefox Android No support No	Opera Android Full support 37	Safari iOS No support No	Samsung Internet Android Full support 5.0
`ondeviceproximity` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 15	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 15	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`ongamepadconnected`	Chrome Full support 35 Full support 35 No support 21 — 35 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤18	Firefox Full support 29	IE No support No	Opera Full support 22 Full support 22 No support 15 — 22 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Safari Full support 10.1	WebView Android Full support 37	Chrome Android Full support 35 Full support 35 No support 25 — 35 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support 32	Opera Android Full support 22 Full support 22 No support 14 — 22 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Safari iOS No support No	Samsung Internet Android Full support 3.0 Full support 3.0 No support 1.5 — 3.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`ongamepaddisconnected`	Chrome Full support 35 Full support 35 No support 21 — 35 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤18	Firefox Full support 29	IE No support No	Opera Full support 22 Full support 22 No support 15 — 22 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Safari Full support 10.1	WebView Android ?	Chrome Android Full support 35 Full support 35 No support 25 — 35 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support 32	Opera Android Full support 22 Full support 22 No support 14 — 22 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Safari iOS No support No	Samsung Internet Android Full support 3.0 Full support 3.0 No support 1.5 — 3.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`online` event	Chrome Full support Yes	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`onpaint` Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android Full support Yes	Chrome Android No support No	Firefox Android No support No	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`onuserproximity` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 15	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 15	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`onvrdisplayactivate` Experimental'Deprecated'	Chrome No support No	Edge No support 15 — 79	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`onvrdisplayblur` Experimental'Deprecated'	Chrome No support No	Edge No support 15 — 79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`onvrdisplayconnect` Experimental'Deprecated'	Chrome No support No Disabled' No support No Disabled' Disabled' This feature is behind the `WebVR` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	Edge No support 15 — 79	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support Yes Notes' Full support Yes Notes' Notes' Chrome for Android 56 supports only Google Daydream View. Notes' Chrome for Android 57 adds support for Google Cardboard.	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes Notes' Full support Yes Notes' Notes' Supported on Samsung Internet for GearVR.
`onvrdisplaydeactivate` Experimental'Deprecated'	Chrome No support No	Edge No support 15 — 79	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`onvrdisplaydisconnect` Experimental'Deprecated'	Chrome No support No Disabled' No support No Disabled' Disabled' This feature is behind the `WebVR` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	Edge No support 15 — 79	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support 56 Notes' Full support 56 Notes' Notes' Chrome for Android 56 supports only Google Daydream View. Notes' Chrome for Android 57 adds support for Google Cardboard.	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 6.0 Notes' Full support 6.0 Notes' Notes' Supported on Samsung Internet for GearVR.
`onvrdisplayfocus` Experimental'Deprecated'	Chrome No support No	Edge No support 15 — 79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`onvrdisplaypointerrestricted` Experimental'Deprecated'	Chrome No support No	Edge No support 15 — 79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`onvrdisplaypointerunrestricted` Experimental'Deprecated'	Chrome No support No	Edge No support 15 — 79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`onvrdisplaypresentchange` Experimental'Deprecated'	Chrome No support 65 — 80 Disabled' No support 65 — 80 Disabled' Disabled' From version 65 until version 80 (exclusive): this feature is behind the `WebVR` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	Edge Full support 15	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support 56 — 80 Notes' No support 56 — 80 Notes' Notes' Chrome for Android 56 supports only Google Daydream View. Notes' Chrome for Android 57 adds support for Google Cardboard.	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 6.0 Notes' Full support 6.0 Notes' Notes' Supported on Samsung Internet for GearVR.
`open`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`openDialog` Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`opener`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`orientation` Deprecated'	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`orientationchange` event Deprecated'	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 44	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`outerHeight`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support 9	Safari Full support 3	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 3	Samsung Internet Android Full support Yes
`outerWidth`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support 9	Safari Full support 3	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 3	Samsung Internet Android Full support Yes
`pagehide` event	Chrome Full support 3	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 1.0
`pageshow` event	Chrome Full support 3	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 1.0
`pageXOffset`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`pageYOffset`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`parent`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support 3	Safari Full support 1.3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`paste` event	Chrome Full support 58	Edge Full support 12	Firefox Full support Yes	IE Full support 11	Opera Full support 45	Safari Full support Yes	WebView Android Full support 58	Chrome Android Full support 58	Firefox Android Full support Yes	Opera Android Full support 43	Safari iOS ?	Samsung Internet Android Full support 7.0
`performance`	Chrome Full support 6	Edge Full support 12	Firefox Full support 7	IE Full support 9	Opera Full support 15	Safari Full support 8	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 7	Opera Android Full support 14	Safari iOS Full support 9	Samsung Internet Android Full support Yes
`personalbar`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE No support No	Opera Full support ≤12.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`pkcs11` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox No support ? — 29	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support ? — 29	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`popstate` event	Chrome Full support 5 Notes' Full support 5 Notes' Notes' Before version 34, Chrome would fire a `popstate` event on page load.	Edge Full support 12	Firefox Full support 4 Notes' Full support 4 Notes' Notes' Firefox emits a `popstate` event on page load.	IE Full support 10	Opera Full support 11.5	Safari Full support 6 Notes' Full support 6 Notes' Notes' Before version 10, Safari would fire a `popstate` event on page load.	WebView Android Full support ≤37 Notes' Full support ≤37 Notes' Notes' Before version 37, WebView would fire a `popstate` event on page load.	Chrome Android Full support 18 Notes' Full support 18 Notes' Notes' Before version 34, Chrome would fire a `popstate` event on page load.	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' Firefox emits a `popstate` event on page load.	Opera Android Full support 11.5	Safari iOS Full support 5.1 Notes' Full support 5.1 Notes' Notes' Before version 10, Safari would fire a `popstate` event on page load.	Samsung Internet Android Full support 1.0 Notes' Full support 1.0 Notes' Notes' Before version 2.0, Samsung Internet would fire a `popstate` event on page load.
`postMessage`	Chrome Full support 1	Edge Full support 12	Firefox Full support 8 Notes' Full support 8 Notes' Notes' 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. Full support 6 Notes' Notes' 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. No support 3 — 6 Notes' Notes' The `message` parameter must be a string.	IE Full support 10 Notes' Full support 10 Notes' Notes' IE10 had an important limitation: see this article for details. No support 8 — 10 Notes' Notes' Support only for `<frame>` and `<iframe>`.	Opera Full support 9.5	Safari Full support 4	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 8 Notes' Full support 8 Notes' Notes' 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. Full support 6 Notes' Notes' 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. No support 4 — 6 Notes' Notes' The `message` parameter must be a string.	Opera Android Full support 10.1	Safari iOS Full support 3.2	Samsung Internet Android Full support 1.0
`print`	Chrome Full support 1 Notes' Full support 1 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Edge Full support 12	Firefox Full support 1	IE Full support 5	Opera Full support 6 Notes' Full support 6 Notes' Notes' Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Safari Full support 1.1	WebView Android Full support 1 Notes' Full support 1 Notes' Notes' Starting with WebView 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Chrome Android Full support 18 Notes' Full support 18 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Firefox Android No support No Notes' No support No Notes' Notes' See bug 1247609.	Opera Android Full support 10.1 Notes' Full support 10.1 Notes' Notes' Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Safari iOS Full support 1	Samsung Internet Android Full support 1.0 Notes' Full support 1.0 Notes' Notes' Starting with Samsung Internet 5.0, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.
`prompt`	Chrome Full support 1 Notes' Full support 1 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Edge Full support 12	Firefox Full support 1	IE Full support 4 Notes' Full support 4 Notes' Notes' 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.	Opera Full support 3 Notes' Full support 3 Notes' Notes' Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Safari Full support 1	WebView Android Full support 1 Notes' Full support 1 Notes' Notes' Starting with WebView 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Chrome Android Full support 18 Notes' Full support 18 Notes' Notes' Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Firefox Android Full support 4	Opera Android Full support 10.1 Notes' Full support 10.1 Notes' Notes' Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.	Safari iOS Full support 1	Samsung Internet Android Full support 1.0 Notes' Full support 1.0 Notes' Notes' Starting with Samsung Internet 5.0, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`.
`rejectionhandled` event	Chrome Full support 49	Edge Full support ≤79	Firefox Full support 69 Full support 69 Full support 68 Disabled' Disabled' From version 68: this feature is behind the `dom.promise_rejection_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 36	Safari Full support 11	WebView Android Full support 49	Chrome Android Full support 49	Firefox Android Full support 68 Disabled' Full support 68 Disabled' Disabled' From version 68: this feature is behind the `dom.promise_rejection_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 36	Safari iOS Full support 11.3	Samsung Internet Android Full support 5.0
`releaseEvents` Deprecated'Non-standard'	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 11	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`requestAnimationFrame`	Chrome Full support 24 Full support 24 Full support 10 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support 12	Firefox Full support 23 Notes' Full support 23 Notes' Notes' Callback parameter is a `DOMHighResTimestamp`. This means ten microsecond precision and zero time as `performance.now()`. No support 11 — 42 Prefixed' Notes' Prefixed' Implemented with the vendor prefix: moz Notes' Callback parameter is a `DOMTimestamp`. This means millisecond precision and zero time as `Date.now()`. No support 4 — 11 Prefixed' Notes' Prefixed' Implemented with the vendor prefix: moz Notes' Could be called with no input parameters.	IE Full support 10	Opera Full support 15 Full support 15 Full support 15 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Safari Full support 6.1 Full support 6.1 Full support 6 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	WebView Android Full support ≤37 Full support ≤37 Full support ≤37 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support 25 Full support 25 Full support 18 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support 23 Full support 23 No support 14 — 42 Prefixed' Prefixed' Implemented with the vendor prefix: moz	Opera Android Full support 14 Full support 14 Full support 14 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Safari iOS Full support 7 Full support 7 Full support 6.1 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Samsung Internet Android Full support 1.5 Full support 1.5 Full support 1.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`requestFileSystem` Experimental'Non-standard'	Chrome Full support 13 Prefixed' Full support 13 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤18 Prefixed' Full support ≤18 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android Full support 37 Prefixed' Full support 37 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support Yes Prefixed' Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes Prefixed' Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`requestIdleCallback` Experimental'	Chrome Full support 47	Edge Full support 79	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Enabled by default. No support 53 — 55 Notes' Notes' Implemented but disabled by default.	IE No support No	Opera Full support 34	Safari No support No	WebView Android Full support 47	Chrome Android Full support 47	Firefox Android Full support 55 Notes' Full support 55 Notes' Notes' Enabled by default. No support 53 — 55 Notes' Notes' Implemented but disabled by default.	Opera Android Full support 34	Safari iOS No support No	Samsung Internet Android Full support 5.0
`resize` event	Chrome Full support 1 Notes' Full support 1 Notes' Notes' Chrome does not emit a `resize` event on page load.	Edge Full support 12 Notes' Full support 12 Notes' Notes' Prior to Edge 79, Edge emitted a `resize` event on page load. This is no longer the case.	Firefox Full support 1 Notes' Full support 1 Notes' Notes' Prior to Firefox 68, Firefox emitted a `resize` event on page load. This is no longer the case.	IE Full support 4	Opera Full support 7 Notes' Full support 7 Notes' Notes' Opera does not emit a `resize` event on page load.	Safari Full support 1.1	WebView Android Full support 1 Notes' Full support 1 Notes' Notes' Webview does not emit a `resize` event on page load.	Chrome Android Full support 18 Notes' Full support 18 Notes' Notes' Chrome does not emit a `resize` event on page load.	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' Prior to Firefox 68, Firefox emitted a `resize` event on page load. This is no longer the case.	Opera Android Full support 10.1 Notes' Full support 10.1 Notes' Notes' Opera does not emit a `resize` event on page load.	Safari iOS Full support 1	Samsung Internet Android Full support 1.0 Notes' Full support 1.0 Notes' Notes' Samsung Internet does not emit a `resize` event on page load.
`resizeBy`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' 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.	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`resizeTo`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' 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.	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`resolveLocalFileSystemURL` Experimental'Non-standard'	Chrome Full support 13 Prefixed' Full support 13 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤79 Prefixed' Full support ≤79 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android Full support Yes Prefixed' Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support Yes Prefixed' Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes Prefixed' Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`restore`	Chrome No support No	Edge No support No	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`returnValue`	Chrome No support No	Edge No support No	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`routeEvent` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`screen`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`screenLeft`	Chrome Full support 1	Edge Full support 12	Firefox Full support 64	IE Full support 5	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 64	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`screenTop`	Chrome Full support 1	Edge Full support 12	Firefox Full support 64	IE Full support 5	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 64	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`screenX`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' 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.	IE Full support 9	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' 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.	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`screenY`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' 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.	IE Full support 9	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4 Notes' Full support 4 Notes' Notes' 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.	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`scroll`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`scrollbars`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE No support No	Opera Full support ≤12.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`scrollBy`	Chrome Full support 1	Edge Full support 79 Full support 79 No support 12 — 79 Notes' Notes' Only `scrollBy(x-coord, y-coord)` is supported.	Firefox Full support 1	IE Partial support 11 Notes' Partial support 11 Notes' Notes' Only `scrollBy(x-coord, y-coord)` is supported.	Opera Full support 3	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`scrollByLines` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes	IE ?	Opera ?	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android ?	Safari iOS No support No	Samsung Internet Android No support No
`scrollByPages` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes	IE ?	Opera ?	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android ?	Safari iOS No support No	Samsung Internet Android No support No
`scrollMaxX` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes	IE ?	Opera ?	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android ?	Safari iOS No support No	Samsung Internet Android No support No
`scrollMaxY` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`scrollTo`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 4	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`scrollX`	Chrome Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Edge Full support 12 Full support 12 Full support 12 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Firefox Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	IE Full support 9 Alternate Name' Full support 9 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Opera Full support 9.6 Full support 9.6 Full support 4 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Safari Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	WebView Android Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Chrome Android Full support 18 Full support 18 Full support 18 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Firefox Android Full support 4 Full support 4 Full support 4 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Opera Android Full support 10.1 Full support 10.1 Full support 10.1 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Safari iOS Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`	Samsung Internet Android Full support 1.0 Full support 1.0 Full support 1.0 Alternate Name' Alternate Name' Uses the non-standard name: `pageXOffset`
`scrollY`	Chrome Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Edge Full support 12 Full support 12 Full support 12 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Firefox Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	IE Full support 9 Alternate Name' Full support 9 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Opera Full support 9.6 Full support 9.6 Full support 4 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Safari Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	WebView Android Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Chrome Android Full support 18 Full support 18 Full support 18 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Firefox Android Full support 4 Full support 4 Full support 4 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Opera Android Full support 10.1 Full support 10.1 Full support 10.1 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Safari iOS Full support 1 Full support 1 Full support 1 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`	Samsung Internet Android Full support 1.0 Full support 1.0 Full support 1.0 Alternate Name' Alternate Name' Uses the non-standard name: `pageYOffset`
`self`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`sessionStorage`	Chrome Full support 5	Edge Full support 12	Firefox Full support 2	IE Full support 8	Opera Full support 10.5	Safari Full support 4	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 11	Safari iOS Full support 3.2	Samsung Internet Android Full support 1.0
`setCursor` Non-standard'	Chrome No support No	Edge No support No	Firefox No support No	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`setImmediate` Non-standard'	Chrome No support No	Edge No support 12 — 79	Firefox No support No	IE Full support 10	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`setResizable` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`showModalDialog` Deprecated'Non-standard'	Chrome No support ? — 43	Edge No support No	Firefox No support 3 — 56	IE Full support 4	Opera No support No	Safari Full support 5.1 Notes' Full support 5.1 Notes' Notes' See WebKit bug 151885 for possible future removal from Safari.	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`sidebar` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes Notes' Full support Yes Notes' Notes' From Firefox 78 `AddSearchProvider()` does nothing, as the specification requires.	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`sizeToContent` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes Full support Yes Full support 20 Notes' Notes' The mimimal size is clamped to prevent the window from being too small for the user to interact with.	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes Notes' Full support Yes Notes' Notes' This method has no effect as a page is always in a tab.	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`speechSynthesis`	Chrome Full support 33	Edge Full support 14	Firefox Full support 49	IE No support No	Opera Full support Yes	Safari Full support 7	WebView Android Full support 37	Chrome Android Full support Yes	Firefox Android No support No	Opera Android No support No	Safari iOS Full support 7	Samsung Internet Android Full support Yes
`status`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`statusbar`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE No support No	Opera Full support 15	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 14	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`stop`	Chrome Full support 1	Edge Full support 14	Firefox Full support 1	IE No support No	Opera Full support ≤12.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`storage` event	Chrome Full support 1	Edge Full support ≤18	Firefox Full support 45	IE ?	Opera Full support 15	Safari ?	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support 45	Opera Android Full support 14	Safari iOS ?	Samsung Internet Android Full support 1.0
`toolbar`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE No support No	Opera Full support 15	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 14	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`top`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1 Notes' Full support 1 Notes' Notes' Starting in Firefox 6, this property is read only, as defined by the standard.	IE Full support 4	Opera Full support ≤12.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`transitioncancel` event	Chrome No support No	Edge No support No	Firefox Full support 53	IE ?	Opera ?	Safari Full support 13.1 Full support 13.1 Full support 12 Disabled' Disabled' From version 12: this feature is behind the `Web Animations` preference and the `CSS Animations via Web Animations` preference.	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 53	Opera Android ?	Safari iOS Full support 13.4 Full support 13.4 Full support 12 Disabled' Disabled' From version 12: this feature is behind the `Web Animations` preference and the `CSS Animations via Web Animations` preference.	Samsung Internet Android No support No
`transitionend` event	Chrome No support No	Edge No support No	Firefox Full support 51	IE ?	Opera ?	Safari Full support Yes	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 51	Opera Android ?	Safari iOS Full support Yes	Samsung Internet Android No support No
`transitionrun` event	Chrome No support No	Edge No support No	Firefox Full support 53	IE ?	Opera ?	Safari Full support 13.1 Full support 13.1 Full support 12 Disabled' Disabled' From version 12: this feature is behind the `Web Animations` preference and the `CSS Animations via Web Animations` preference.	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 53	Opera Android ?	Safari iOS Full support 13.4 Full support 13.4 Full support 12 Disabled' Disabled' From version 12: this feature is behind the `Web Animations` preference and the `CSS Animations via Web Animations` preference.	Samsung Internet Android No support No
`transitionstart` event	Chrome No support No	Edge No support No	Firefox Full support 53	IE ?	Opera ?	Safari Full support 13.1 Full support 13.1 Full support 12 Disabled' Disabled' From version 12: this feature is behind the `Web Animations` preference and the `CSS Animations via Web Animations` preference.	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 53	Opera Android ?	Safari iOS Full support 13.4 Full support 13.4 Full support 12 Disabled' Disabled' From version 12: this feature is behind the `Web Animations` preference and the `CSS Animations via Web Animations` preference.	Samsung Internet Android No support No
`unhandledrejection` event	Chrome Full support 49	Edge Full support ≤79	Firefox Full support 69 Full support 69 Full support 68 Disabled' Disabled' From version 68: this feature is behind the `dom.promise_rejection_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 36	Safari Full support 11	WebView Android Full support 49	Chrome Android Full support 49	Firefox Android Full support 68 Disabled' Full support 68 Disabled' Disabled' From version 68: this feature is behind the `dom.promise_rejection_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 36	Safari iOS Full support 11.3	Samsung Internet Android Full support 5.0
`unload` event	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 4	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0
`updateCommands` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support Yes	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android Full support Yes	Opera Android ?	Safari iOS ?	Samsung Internet Android No support No
`visualViewport` Experimental'	Chrome Full support 61	Edge Full support 79	Firefox Full support 63 Disabled' Full support 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.	IE No support No	Opera Full support 48	Safari Full support 13	WebView Android Full support 61	Chrome Android Full support 61	Firefox Android Full support 63 Disabled' Full support 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.	Opera Android Full support 45	Safari iOS Full support 13	Samsung Internet Android Full support 8.0
`vrdisplayactivate` event Experimental'	Chrome No support No	Edge No support No	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`vrdisplayblur` event Experimental'	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`vrdisplayconnect` event Experimental'	Chrome No support No Disabled' No support No Disabled' Disabled' This feature is behind the `WebVR` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	Edge No support 15 — 79	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support Yes Notes' Full support Yes Notes' Notes' Chrome for Android 56 supports only Google Daydream View. Notes' Chrome for Android 57 adds support for Google Cardboard.	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes Notes' Full support Yes Notes' Notes' Supported on Samsung Internet for GearVR.
`vrdisplaydeactivate` event Experimental'	Chrome No support No	Edge No support No	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`vrdisplaydisconnect` event Experimental'	Chrome No support No Disabled' No support No Disabled' Disabled' This feature is behind the `WebVR` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	Edge No support 15 — 79	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support 56 Notes' Full support 56 Notes' Notes' Chrome for Android 56 supports only Google Daydream View. Notes' Chrome for Android 57 adds support for Google Cardboard.	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 6.0 Notes' Full support 6.0 Notes' Notes' Supported on Samsung Internet for GearVR.
`vrdisplayfocus` event Experimental'	Chrome No support No	Edge No support 15 — 79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`vrdisplaypointerrestricted` event Experimental'	Chrome No support No	Edge No support 15 — 79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`vrdisplaypointerunrestricted` event Experimental'	Chrome No support No	Edge No support 15 — 79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No
`vrdisplaypresentchange` event Experimental'	Chrome Full support 65 Disabled' Full support 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.	Edge Full support 15	Firefox Full support 55 Notes' Full support 55 Notes' Notes' Windows support was enabled in Firefox 55. Full support 64 Notes' Notes' macOS support was enabled in Firefox 64.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support 56 Notes' Full support 56 Notes' Notes' Chrome for Android 56 supports only Google Daydream View. Notes' Chrome for Android 57 adds support for Google Cardboard.	Firefox Android Full support 55	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 6.0 Notes' Full support 6.0 Notes' Notes' Supported on Samsung Internet for GearVR.
`window`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support ≤12.1	Safari Full support 3	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support ≤12.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0

Legend

Full support: Full support
Partial support: Partial support
No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.': Deprecated. Not for use in new websites.
See implementation notes.': See implementation notes.
User must explicitly enable this feature.': User must explicitly enable this feature.
Uses a non-standard name.': Uses a non-standard name.
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.

Window by Mozilla Contributors is licensed under CC-BY-SA 2.5.