MouseEvent: clientY property
The clientY
read-only property of the MouseEvent
interface provides the vertical coordinate within the application's viewport at which the event occurred (as opposed to the coordinate within the page).
For example, clicking on the top edge of the viewport will always result in a mouse event with a clientY
value of 0
, regardless of whether the page is scrolled vertically.
Value
A double
floating point value.
Examples
This example displays your mouse's coordinates whenever you trigger the mousemove
event.
HTML
html
<p>Move your mouse to see its position.</p>
<p id="screen-log"></p>
JavaScript
js
let screenLog = document.querySelector("#screen-log");
document.addEventListener("mousemove", logKey);
function logKey(e) {
screenLog.innerText = `
Screen X/Y: ${e.screenX}, ${e.screenY}
Client X/Y: ${e.clientX}, ${e.clientY}`;
}
Result
Specifications
Specification |
---|
UI Events # dom-mouseevent-clienty |
Browser compatibility
BCD tables only load in the browser