.prototype与构造函数的Javascript继承

如何解决.prototype与构造函数的Javascript继承

有人可以告诉我为什么当构造函数对我来说如此轻松和友好时，我应该使用痛苦的.prototype方法。

parrot.presentation（）和parrot.secondPresentation（）都可以工作。我只想知道是旧还是新或，是否真的有1％的时间需要使用或，我不知道，但我真的想了解或了解差异的一个很好的例子。

非常感谢

function Animal(name,paws,weight) {
  this.name = name;
  this.paws = paws;
  this.weight = weight;

  // By Constructor
  this.presentation = function() {
    console.log("I am a " + this.name + " and I have " + this.paws + " paws");
  }
}

// By .prototype
Animal.prototype.secondPresentation = function() {
  console.log("Hello,I use prototype to present myself: " + this.name + ",Now gtfo");
}
/////////

function Bird(name,wingLength,weight) {
  Animal.call(this,name,weight);
  this.wingLength = wingLength;
}

// By .prototyte
Bird.prototype = Object.create(Animal.prototype);
Bird.prototype.constructor = Bird;
////////

function Mammal(name,hairType,weight);
  this.hairType = hairType;
}

var parrot= new Bird("Parrot","large",2,"5kg");
console.log(parrot);

parrot.presentation();
parrot.secondPresentation();