eventPageX

eventPageX refers to a property of a UIEvent object in web development, specifically in JavaScript. It represents the horizontal coordinate of the point where the event occurred, relative to the origin of the page. The origin of the page is considered to be the top-left corner of the entire document's viewport, irrespective of scrolling. This means that if a user scrolls down the page, eventPageX will still report the coordinate relative to the top of the document, not the visible portion of the window.

This property is useful for determining the exact position of a user's interaction, such as a mouse click or touch event, within the context of the entire web page. It differs from related properties like eventClientX, which reports the coordinate relative to the viewport, and eventScreenX, which reports the coordinate relative to the user's screen. Understanding the distinction between these properties is crucial for accurate event handling and positioning elements on a web page based on user input. For instance, if you need to open a context menu at the precise location of a right-click on the page, eventPageX would be the appropriate property to use.