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    MouseEvent.ctrlKey

    The MouseEvent.ctrlKey read-only property returns a Boolean that indicates if the control key was pressed (true) or not (false) when the event occured.

    Syntax

    var ctrlKeyPressed = instanceOfMouseEvent.ctrlKey
    

    Return value

    A boolean

    Example

    <html>
    <head>
    <title>ctrlKey example</title>
    
    <script type="text/javascript">
    
    function showChar(e){
      alert(
        "Key Pressed: " + String.fromCharCode(e.charCode) + "\n"
        + "charCode: " + e.charCode + "\n"
        + "CTRL key pressed: " + e.ctrlKey + "\n"
      );
    }
    
    </script>
    </head>
    
    <body onkeypress="showChar(event);">
    <p>Press any character key, with or without holding down the CTRL key.<br />
    You can also use the SHIFT key together with the CTRL key.</p>
    </body>
    </html>
    

    Specifications

    Specification Status Comment
    Document Object Model (DOM) Level 3 Events Specification
    The definition of 'MouseEvent.ctrlKey' 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.ctrlKey' 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: amycb, teoli, Jeremie
    Last updated by: teoli,