caller

Summary

Gets the function that invoked the current function.

Syntax

functionName.caller

Examples

The following example illustrates the use of the caller property:

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

 document.write(CallLevel());

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

Remarks

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.

See also

Other articles

• function Statement

Attributions

• Microsoft Developer Network: Article