Window

The Window.alert() method displays an alert dialog with the optional specified content and an OK button.

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

The window.blur() method is the programmatic equivalent of the user shifting focus away from the current window.

Cancels an animation frame request previously scheduled through a call to window.requestAnimationFrame().

Closes the current window, or a referenced window.

The Window.confirm() method displays a modal dialog with an optional message and two buttons, OK and Cancel.

Returns a reference to the CustomElementRegistry object, which can be used to register new custom elements and get information about previously registered custom elements.

The Window.devicePixelRatio read-only property returns the ratio of the (vertical) size of one physical pixel on the current display device to the size of one device independent pixel (dips).

Returns a reference to the document that the window contains.

Makes a request to bring the window to the front. It may fail due to user settings and the window isn't guaranteed to be frontmost before this method returns.

Returns the element (such as <iframe> or <object>) in which the window is embedded, or null if the window is top-level.

Returns the window itself, which is an array-like object, listing the direct sub-frames of the current window.

Returns a selection object representing the range of text selected by the user.

The Window.history read-only property returns a reference to the History object, which provides an interface for manipulating the browser session history (pages visited in the tab or frame that the current page is loaded in).

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

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

Returns the number of frames (either frame or iframe elements) in the window.

Returns a new MediaQueryList object representing the parsed results of the specified media query string.

Moves the current window by a specified amount.

Moves the window to the specified coordinates.

The Window.navigator read-only property returns a reference to the Navigator object, which can be queried for information about the application running the script.

Loads a resource in a new browsing context or an existing one.

window.outerHeight gets the height in pixels of the whole browser window. It represents the height of the whole browser window including sidebar (if expanded), window chrome and window resizing borders/handles.

window.outerWidth gets the width of the outside of the browser window. It represents the width of the whole browser window including sidebar (if expanded), window chrome and window resizing borders/handles.

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

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

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

The Web Performance API allows web pages access to certain functions for measuring the performance of web pages and web applications, including the Navigation Timing API and high-resolution time data.

Safely enables cross-origin communication between Window objects; e.g., between a page and a pop-up that it spawned, or between a page and an iframe embedded within it.

Normally, scripts on different pages are allowed to access each other if and only if the pages they originate from share the same protocol, port number, and host (also known as the "same-origin policy"). window.postMessage() provides a controlled mechanism to securely circumvent this restriction (if used properly).

Broadly, one window may obtain a reference to another (e.g., via targetWindow = window.opener), and then dispatch a MessageEvent on it with targetWindow.postMessage(). The receiving window is then free to handle this event as needed. The arguments passed to window.postMessage() (i.e., the “message”) are exposed to the receiving window through the event object.

Opens the Print Dialog to print the current document.

The Window.prompt() displays a dialog with an optional message prompting the user to input some text.

The window.requestAnimationFrame() method tells the browser that you wish to perform an animation and requests that the browser call a specified function to update an animation before the next repaint. The method takes as an argument a callback to be invoked before the repaint.

Resizes the current window by a certain amount.

Dynamically resizes window.

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

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

Scrolls the window to a particular place in the document.

Scrolls the document in the window by the given amount.

Scrolls to a particular set of coordinates in the document.

The read-only scrollX property of the Window interface returns the number of pixels that the document is currently scrolled horizontally. This value is subpixel precise in modern browsers, meaning that it isn't necessarily a whole number. You can get the number of pixels the document is scrolled vertically from the scrollY property.

The read-only scrollY property of the Window interface returns the number of pixels that the document is currently scrolled vertically. This value is subpixel precise in modern browsers, meaning that it isn't necessarily a whole number. You can get the number of pixels the document is scrolled horizontally from the scrollX property.

Returns an object reference to the window object itself.

The Window.showModalDialog() creates and displays a modal dialog box containing a specified HTML document.

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

The window property of a window object points to the window object itself.

The EventTarget.addEventListener() method registers the specified listener on the EventTarget it's called on. The event target may be an Element in a document, the Document itself, a Window, or any other object that supports events (such as XMLHttpRequest).

This implementation accepts a settings object of type EventListenerOptions.

The EventTarget.addEventListener() method registers the specified listener on the EventTarget it's called on. The event target may be an Element in a document, the Document itself, a Window, or any other object that supports events (such as XMLHttpRequest).

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

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

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.

Cancels repeated action which was set up using setInterval.

Clears the delay set by window.setTimeout().

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.

Returns a boolean value that indicates whether a SharedArrayBuffer can be sent via a Window.postMessage() call.

Dispatches an Event at the specified EventTarget, invoking the affected EventListeners in the appropriate order. The normal event processing rules (including the capturing and optional bubbling phase) apply to events dispatched manually with dispatchEvent().

Starts the process of fetching a resource from the network.

Provides a mechanism for applications to asynchronously access capabilities of indexed databases.

Returns a boolean indicating whether the current context is secure or not.

Returns the origin of the global scope, serialized as a string.

Enqueues a microtask—a short function to be executed after execution of the JavaScript code completes and control isn't being returned to a JavaScript caller, but before handling callbacks and other tasks.

This lets your code run without interfering with other, possibly higher priority, code, but before the browser runtime regains control, potentially depending upon the work you need to complete.

Removes the event listener previously registered with EventTarget.addEventListener.

This implementation accepts a settings object of type EventListenerOptions.

Removes the event listener previously registered with EventTarget.addEventListener.

This is a global object (sessionStorage) that maintains a storage area that's available for the duration of the page session. A page session lasts for as long as the browser is open and survives over page reloads and restores. Opening a page in a new tab or window will cause a new session to be initiated.

Calls a function or executes a code snippet repeatedly, with a fixed time delay between each call to that function.

Calls a function or executes a code snippet after a specified delay.

fired when an element receives pointer capture.

The Window.location property returns a Location object with information about the current location of the document.

Fired after pointer capture is released for a pointer.

The name of the window is used primarily for setting targets for hyperlinks and forms. Windows do not need to have names.

An event handler property for abort events on the window.

The onafterprint property sets and returns the onafterprint event handler code for the current window.

The onbeforeprint property sets and returns the onbeforeprint event handler code for the current window.

An event that fires when a window is about to unload its resources. The document is still visible and the event is still cancelable.

The onblur property can be used to set the blur handler on the window, which is triggered when the window loses focus.

An event handler property for change events on the window.

Called when the user clicks the mouse button while the cursor is in the window. This event is fired for any mouse button pressed; you can look at the event properties to find out which button was pressed and where.

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

Called for an element when the mouse pointer first moves over the element while something is being dragged. This might be used to change the appearance of the element to indicate to the user that the object can be dropped on it.

An event handler property for errors raised on the window.

An event handler property for focus events on the window.

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

An event handler property for keydown events on the window.

An event handler property for keypress events on the window.

An event handler property for keyup events on the window.

An event handler property for window loading.

An event handler property for mousedown events on the window.

An event handler property for mousemove events on the window.

An event handler property for mouseout events on the window.

An event handler property for mouseover events on the window.

An event handler property for mouseup events on the window.

An event handler property for pagehide events, which are fired when the browser hides the current page in the process of presenting a different page from the session's history.

For example, when the user clicks the browser's Back button, the current page receives a pagehide event before the previous page is shown.

An event handler property for pageshow events, which are fired when the browser makes the window's document visible due to navigation tasks. This includes the process of initially loading the page, navigating to the page from another page within the same window or tab, or returning to the page using the browser's forward or back buttons.

When this event is sent during the page load process, it's sent after the load event.

a browser fires this event if it concludes the pointer will no longer be able to generate events (for example the related device is deactived).

fired when a pointer becomes active.

fired when a pointing device is moved into the hit test boundaries of an element or one of its descendants, including as a result of a pointerdown event from a device that does not support hover (see pointerdown).

fired when a pointing device is moved out of the hit test boundaries of an element. For pen devices, this event is fired when the stylus leaves the hover range detectable by the digitizer.

fired when a pointer changes coordinates.

fired for several reasons including: pointing device is moved out of the hit test boundaries of an element; firing the pointerup event for a device that does not support hover (see pointerup); after firing the pointercancel event (see pointercancel); when a pen stylus leaves the hover range detectable by the digitizer.

fired when a pointing device is moved into an element's hit test boundaries.

fired when a pointer is no longer active.

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

An event handler property for reset events on the window.

An event handler for the resize event on the window.

Specifies the function to be called when the window is scrolled.

An event handler property for window selection.

An event handler property for submits on window forms.

The unload event is raised when the window is unloading its content and resources. The resources removal is processed  after the unload event occurs.

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

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