caller Property (Function) (JavaScript)

Gets the function that invoked the current function.




The functionName object is the name of any executing function.

The caller property is defined for a function only while that function is executing. If the function is called from the top level of a JavaScript program, caller contains null.

If the caller property is used in a string context, the result is the same as functionName.toString, that is, the decompiled text of the function is displayed.

The following example illustrates the use of the caller property:

function CallLevel(){  
   if (CallLevel.caller == null)  
      return("CallLevel was called from the top level.");  
      return("CallLevel was called by another function.");  


// Output: CallLevel was called from the top level.  


Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

See Also

function Statement