prototype-new-this.js

function Rabbit(name) {
  this.name = name;
}
Rabbit.prototype.sayHi = function() {
  console.log( this.name );
}

var rabbit = new Rabbit('Rabbit');

rabbit.sayHi(); // (1) ?
Rabbit.prototype.sayHi(); // (2) ?
Object.getPrototypeOf(rabbit).sayHi(); // (3) ?
rabbit.__proto__.sayHi(); // (4) ?

//(1) 'Rabbit', following the rule of "this - is the object before the point."
//this === rabbit

//(2-4) undefined, this === Rabbit