The Window Object
Window Object
The window object represents an open window in a browser.
If a document contain frames (<iframe> tags), the browser creates one window object for the HTML document, and one additional window object for each frame.
Note: There is no public standard that applies to the Window object, but all major browsers support it.
Window Object Properties
| Property | Description |
|---|---|
| closed | Returns a Boolean value indicating whether a window has been closed or not |
| defaultStatus | Sets or returns the default text in the statusbar of a window |
| document | Returns the Document object for the window (See Document object) |
| frameElement | Returns the <iframe> element in which the current window is inserted |
| frames | Returns all <iframe> elements in the current window |
| history | Returns the History object for the window (See History object) |
| innerHeight | Returns the inner height of a window's content area |
| innerWidth | Returns the inner width of a window's content area |
| length | Returns the number of <iframe> elements in the current window |
| localStorage | Returns a reference to the local storage object used to store data. Stores data with no expiration date |
| location | Returns the Location object for the window (See Location object) |
| name | Sets or returns the name of a window |
| navigator | Returns the Navigator object for the window (See Navigator object) |
| opener | Returns a reference to the window that created the window |
| outerHeight | Returns the outer height of a window, including toolbars/scrollbars |
| outerWidth | Returns the outer width of a window, including toolbars/scrollbars |
| pageXOffset | Returns the pixels the current document has been scrolled (horizontally) from the upper left corner of the window |
| pageYOffset | Returns the pixels the current document has been scrolled (vertically) from the upper left corner of the window |
| parent | Returns the parent window of the current window |
| screen | Returns the Screen object for the window (See Screen object) |
| screenLeft | Returns the horizontal coordinate of the window relative to the screen |
| screenTop | Returns the vertical coordinate of the window relative to the screen |
| screenX | Returns the horizontal coordinate of the window relative to the screen |
| screenY | Returns the vertical coordinate of the window relative to the screen |
| sessionStorage | Returns a reference to the local storage object used to store data. Stores data for one session (lost when the browser tab is closed) |
| scrollX | An alias of pageXOffset |
| scrollY | An alias of pageYOffset |
| self | Returns the current window |
| status | Sets or returns the text in the statusbar of a window |
| top | Returns the topmost browser window |
Window Object Methods
| Method | Description |
|---|---|
| alert() | Displays an alert box with a message and an OK button |
| atob() | Decodes a base-64 encoded string |
| blur() | Removes focus from the current window |
| btoa() | Encodes a string in base-64 |
| clearInterval() | Clears a timer set with setInterval() |
| clearTimeout() | Clears a timer set with setTimeout() |
| close() | Closes the current window |
| confirm() | Displays a dialog box with a message and an OK and a Cancel button |
| createPopup() | Creates a pop-up window |
| focus() | Sets focus to the current window |
| getComputedStyle() | Gets the current computed CSS styles applied to an element |
| getSelection() | Returns a Selection object representing the range of text selected by the user |
| matchMedia() | Returns a MediaQueryList object representing the specified CSS media query string |
| moveBy() | Moves a window relative to its current position |
| moveTo() | Moves a window to the specified position |
| open() | Opens a new browser window |
| print() | Prints the content of the current window |
| prompt() | Displays a dialog box that prompts the visitor for input |
| resizeBy() | Resizes the window by the specified pixels |
| resizeTo() | Resizes the window to the specified width and height |
| scroll() | Deprecated. This method has been replaced by the scrollTo() method. |
| scrollBy() | Scrolls the document by the specified number of pixels |
| scrollTo() | Scrolls the document to the specified coordinates |
| setInterval() | Calls a function or evaluates an expression at specified intervals (in milliseconds) |
| setTimeout() | Calls a function or evaluates an expression after a specified number of milliseconds |
| stop() | Stops the window from loading |
