The 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 |
console | Returns a reference to the Console object, which provides methods for logging information to the browser's console (See Console object) |
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 height of the window's content area (viewport) including scrollbars |
innerWidth | Returns the width of a window's content area (viewport) including scrollbars |
length | Returns the number of <iframe> elements in the current window |
localStorage | Allows to save key/value pairs in a web browser. Stores the 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 height of the browser window, including toolbars/scrollbars |
outerWidth | Returns the width of the browser 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 | Allows to save key/value pairs in a web browser. Stores the data for one session |
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 |
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 |
requestAnimationFrame() | Requests the browser to call a function to update an animation before the next repaint |
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 |
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