node.js - Different ways of extending class in Javascript -

i'm reading this article on extending eventemitter class in node , there's small part don't understand:

door.prototype.__proto__ = events.eventemitter.prototype; 

i've looked several articles on how supposed work don't understand it. know alternatively, use util.inherits i'm trying understand happens in line above.

i'd know if doing have same result using __proto__:

door.prototype = object.create(eventemitter.prototype); //or door.prototype = new eventemitter(); // know calls constructor 

so, difference these 3 methods, , how __proto__ work?

edit:

so looked @ links posted. understand prototype used build __proto__ used in lookup chain resolve methods. article linked says line copies eventemitter properties door object:

door.prototype.__proto__ = events.eventemitter.prototype; 

now question, might not have been clear earlier is: if point of line above, copying properties of eventemitter door object, think same achieved doing:

door.prototype = new eventemitter(); 

this objects have access , why.

we need understand __proto__ vs prototype. refer question , answer understand two. __proto__ vs. prototype in javascript

the line of code looking @ constructor inheriting eventemitter prototype. creates chain system include methods multiple constructor functions.

door.prototype.open = function(){ ... open something... }; door.prototype.__proto__ = events.eventemitter.prototype; var mydoor = new door; 

the object mydoor have method open , methods eventemitter prototype.