Explanation of prototypes

proto.js

// http://dailyjs.com/2012/11/26/js101-proto/

var assert = require('assert');

function User() {
}

var user = new User();

assert.equal(user.__proto__, User.prototype);
assert.equal(user.constructor, User);
assert.equal(user.constructor.prototype, User.prototype);
assert.equal(user.constructor.prototype, user.__proto__);
assert.equal(Object.getPrototypeOf(user), User.prototype);