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Window: innerHeight property

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.

Value

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.

Examples

Assuming a frameset

console.log(window.innerHeight); // or

console.log(self.innerHeight);
// will log the height of the frame viewport within the frameset

console.log(parent.innerHeight);
// will log the height of the viewport of the closest frameset

console.log(top.innerHeight);
// will log the height of the viewport of the outermost frameset

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

Demo

HTML

html

<p>Resize the browser window to fire the <code>resize</code> event.</p>
<p>Window height: <span id="height"></span></p>
<p>Window width: <span id="width"></span></p>

JavaScript

const heightOutput = document.querySelector("#height");
const widthOutput = document.querySelector("#width");

function updateSize() {
  heightOutput.textContent = window.innerHeight;
  widthOutput.textContent = window.innerWidth;
}

updateSize();
window.addEventListener("resize", updateSize);

Result

You can also view the results of the demo code in a separate page.

Specifications

Specification
CSSOM View Module # dom-window-innerheight

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`innerHeight`	1	12	1 From version 4 to 24, this property could give a wrong value before page load in certain circumstances (see bug 641188).	9	9	3	4.4	18	4 Before version 24, this property could give a wrong value before page load in certain circumstances (see bug 641188).	10.1	1 This property returns the height of the visual viewport instead of the layout viewport. See this bug for details.	1.0