MouseEvent.clientX

by 3 contributors:

The MouseEvent.clientX read-only property provides the horizontal coordinate within the application's client area at which the event occurred (as opposed to the coordinates within the page). For example, clicking in the top-left corner of the client area will always result in a mouse event with a clientX value of 0, regardless of whether the page is scrolled horizontally.

Syntax

var x = instanceOfMouseEvent.clientX

Return value

A number

Example

<!DOCTYPE html> 
<html>
<head>
<title>clientX\clientY example</title>

<script>
function showCoords(evt){
  alert(
    "clientX value: " + evt.clientX + "\n" +
    "clientY value: " + evt.clientY + "\n"
  );
}
</script>
</head>

<body onmousedown="showCoords(event)">
<p>To display the mouse coordinates click anywhere on the page.</p>
</body>
</html>

Specifications

Specification Status Comment
Document Object Model (DOM) Level 3 Events Specification
The definition of 'MouseEvent.clientX' in that specification.
Working Draft No change from Document Object Model (DOM) Level 2 Events Specification.
Document Object Model (DOM) Level 2 Events Specification
The definition of 'MouseEvent.clientX' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Firefox Mobile (Gecko) Android IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? ? ?

See also

Document Tags and Contributors

Contributors to this page: teoli, amycb, Jeremie
Last updated by: teoli,