javascript - Cannot create Object of function defined in closure? -

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Why is it that I can not create objects from a function defined in the closing? 

  var external = function () {var constructor = function () {this.foo = 1; }; Return constructor; }; // should be: {foo: 1}, but it is: undefined var constructorObject = new external () (); // This works var c = external (); Var Constructor Object = New C ();    
 
 
 The external function call in the bracket needs to be wrapped evenly:  
  var constructorObject = new (outer ()) (); // ^ ^ Center Center here console.log (Constructor object); // constructor {foo: 1} console.log (constructor object.fu); // 1

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