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    MouseEvent.clientX

    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:
    Last updated by: teoli,