Window: innerHeight property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

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 height 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.

<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);