Inherit properites in javascript “object”

Question

Folks, can you please help me with this questions.

var Module = function ( options ) {
var settings = {
    selector: 'body',
    declaration: function () {
        return{
            init: function () {
                console.log( 'nodule initialize' );
            },
            destroy: function () {
                console.log( ' module destroyed' );
            }
        }
     }
   };
this.declaration = options.declaration || settings.declaration;
this.selector = options.selector || settings.selector;
};

var Registration = function ( options ) {
   this.selector = options.selector || **strong text**;
   this.declaration = options.declaration
}
app.utils.extend( Module, Registration );
var m_registration = new Registration( {
   declaration: function ( f ) {
      return {
        init: function () {
        },
        destroy: function () {
        }
    }
  }
} );

My main questions, how i can inherit Module.selector properties in m_registration, if we haven't need quantity arguments passed when we are creating instance of Registration

My realisation of function app.utils.extend():

var app.utils.extend = function ( from, to ) {
        var F = function () {
        };
        F.prototype = from.prototype;
        to.prototype = new F();
        to.prototype.constructor = to;
        to.superclass = from.prototype;
    }

---

Update :

If we are using these method:

var Registration = function ( options ) {
       Module.call(this, { selector : options.selector });
       this.declaration = options.declaration
}

How we can use inheritance if we really dont know from what instance this class extended or inheritance.

Answer 1

var Registration = function ( options ) {
   Module.call(this, { selector : options.selector || **strong text**});
   this.declaration = options.declaration
}

I don't know what **strong text** means in your case. But if you call it like this

var Registration = function ( options ) {
       Module.call(this, { selector : options.selector });
       this.declaration = options.declaration
    }

Or

var Registration = function ( options ) {
       Module.call(this, options );
       this.declaration = options.declaration
    }

In your case m_registration.selector will be 'body'

Answer 2

var Module = function ( options ) {
    this.declaration = options.declaration;
    this.selector = options.selector;
}

Module.prototype = {
    selector: 'body',
    declaration: function () {
        return{
            init: function () {
                console.log( 'nodule initialize' );
            },
            destroy: function () {
                console.log( ' module destroyed' );
            }
        }
     }
   };

Another approach is to put all the properties you want inherited to the prototype property. This is how javascript engine deals with inheritance