What it the significance of the Javascript constructor property?

Question

Trying to bend by head around Javascript\'s take on OO...and, like many others, running into confusion about the constructor property. In particular, the signif

Answer 1

one case to use constructor:

1. this is one of the common realization of inheritance:

   Function.prototype.extend = function(superClass,override) {
       var f = new Function();
       f.prototype = superClass.prototype;
       var p = this.prototype = new f();
       p.constructor = this;
       this.superclass = superClass.prototype;
       ...
   };
   

2. this new f() would not call the constructor of superClass,so when you create a subClass,maybe you need call the superClass at first,like this:

   SubClass = function() {
       SubClass.superClass.constructor.call(this);
   };
   

so the constructor property make sense here.