The read-only innerHeight property of the Window interface returns the interior height of the window in pixels, including the height of the horizontal scroll bar, if present.

The value of innerHeight is taken from the height of the window's layout viewport. The width can be obtained using the innerWidth property.


let intViewportHeight = window.innerHeight;


An integer value indicating the window's layout viewport height in pixels. The property is read only and has no default value.

To change the width of the window, call one of its resize methods, such as resizeTo() or resizeBy().

Usage notes

To obtain the height of the window minus its horizontal scroll bar and any borders, use the root <html> element's clientHeight property instead.

Both innerHeight and innerWidth are available on any window or any object that behaves like a window, such as a tab or frame.


Assuming a frameset

var intFrameHeight = window.innerHeight; // or

var intFrameHeight = self.innerHeight;
// will return the height of the frame viewport within the frameset

var intFramesetHeight = parent.innerHeight;
// will return the height of the viewport of the closest frameset

var intOuterFramesetHeight = top.innerHeight;
// will return the height of the viewport of the outermost frameset
FIXME: link to an interactive demo here

To change the size of a window, see window.resizeBy() and window.resizeTo().

To get the outer height of a window, i.e. the height of the whole browser window, see window.outerHeight.

Graphical example

The following figure shows the difference between outerHeight and innerHeight.

innerHeight vs outerHeight illustration


CSSOM View Module (CSSOM View)
# dom-window-innerheight

Browser compatibility

BCD tables only load in the browser

See also