The innerWidth property sets or returns the inner width of a window's content area.
The innerHeight property sets or returns the inner height of a window's content area.
Note: Use the outerWidth and outerHeight properties to get width/height with toolbars/scrollbars.
The innerWidth and innerHeight properties are supported in all major browsers.
Note: These properties are not supported in IE8 and earlier.
Get the window's height and width: (NOT including toolbars/scrollbars):
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