这个 window 对象

window 对象

window 对象代表浏览器中打开的窗口。

如果文档包含框架（<iframe> 标记），则浏览器会为 HTML 文档创建一个窗口对象，并为每个框架创建一个附加窗口对象。

window 对象属性

Property	Description
closed	Returns a boolean true if a window is closed.
console	Returns the Console Object for the window. See also The Console Object.
defaultStatus	Deprecated.
document	Returns the Document object for the window. See also The Document Object.
frameElement	Returns the frame in which the window runs.
frames	Returns all window objects running in the window.
history	Returns the History object for the window. See also The 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 also the The Location Object.
name	Sets or returns the name of a window
navigator	Returns the Navigator object for the window. See also The 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 also The 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	Deprecated. Avoid using it.
top	Returns the topmost browser window

窗口对象方法

Method	Description
addEventListener()	Attaches an event handler to the window
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
removeEventListener()	Removes an event handler from the window
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