Window pageXOffset Property

Definition and Usage

pageXOffset The property returns the number of pixels the document has scrolled from the top left corner of the window.

pageXOffset The property is equal to scrollX Property.

pageXOffset The property is read-only.

See also:

screenX property

screenY property

Instance

Example 1

Scroll the content by 100 pixels and prompt pageXOffset and pageYOffset:

window.scrollBy(100, 100);
alert(window.pageXOffset + window.pageYOffset);

Try it yourself

Example 2

Create a sticky navigation bar:

// Get the navigation bar
const navbar = document.getElementById("navbar");
// Get the offset position of the navigation bar
const sticky = navbar.offsetTop;
// Add the sticky class to the navigation bar when you reach its scroll position. Remove the sticky class when you leave the scroll position.
function myFunction() {
  if (window.pageYOffset >= sticky) {
    navbar.classList.add("sticky")
  }
    navbar.classList.remove("sticky");
  }
}

Try it yourself

Syntax

window.pageXOffset

Or:

pageXOffset

Return value

Type Description
Number The number of pixels the document scrolls from the top left corner of the window.

Browser support

Όλοι οι περιηγητές υποστηρίζουν window.pageXOffset：

Chrome IE Edge Firefox Safari Opera
Chrome IE Edge Firefox Safari Opera
Υποστήριξη 9-11 Υποστήριξη Υποστήριξη Υποστήριξη Υποστήριξη