arguments.caller : arguments « Function « JavaScript Tutorial






  1. JavaScript Tutorial
  2. Function
  3. arguments

The caller property contains the Arguments object of the calling function.

If the given function was not executed from another function, arguments.caller is null.

<html>
    <form>
    <input type="button" value="A" OnClick=myFunction(this,"A")>
    <input type="button" value="B" OnClick=myFunction(this,"B")>
    <input type="button" value="C" OnClick=myFunction(this,"C")>
    <input type="button" value="D" OnClick=myFunction(this,"D")>
    <input type="button" value="E" OnClick=myFunction(this,"E")>
    </form>
    <script language="JavaScript">

    <!--
    function displayArgLength()
    {
      var argLengthStr = "The calling function contained ";
      argLengthStr += arguments.caller.length;
      argLengthStr += " arguments.";
      alert(argLengthStr);
    }
    function myFunction()
    {
      var aString = arguments[0].value;
      aString += "'s is ";
      aString += arguments[1];
      alert(aString);
      displayArgLength();
    }
    -->
    </script>
    </html>








7.4.arguments
7.4.1.arguments
7.4.2.arguments.callee
7.4.3.arguments.caller
7.4.4.arguments.length
7.4.5.Use arguments.callee.toString() to get the source of the function
7.4.6.Accessing Function Arguments with the arguments Array
7.4.7.Get function parameter length