javascript – 使用Object.assign和Object.create进行继承

function Animal () { this.x = 0; this.y = 0;}

Animal.prototype.locate = function() { 
  console.log(this.x,this.y);
  return this;
};
Animal.prototype.move = function(x,y) {
  this.x = this.x + x;
  this.y = this.y + y; 
  return this;
}


function Duck () {
    Animal.call(this);
}

Duck.prototype = new Animal();
Duck.prototype.constructor = Duck;
Duck.prototype.speak = function () {
    console.log("quack");
    return this;
}

var daffy = new Duck();

daffy.move(6,7).locate().speak();

我已经读过this post by Eric Elliott,如果我理解正确,我可以使用Object.create和Object.assign？真的那么简单吗？

var animal = {
   x : 0,y : 0,locate : function () { 
     console.log(this.x,this.y);
     return this;
   },move : function (x,y) { 
     this.x = this.x + x; 
     this.y = this.y + y;
     return this;
   }
}

var duck = function () {
   return Object.assign(Object.create(animal),{
     speak : function () { 
       console.log("quack");
       return this;
     }
   });
}

var daffy = duck();

daffy.move(6,7).locate().speak();

除此之外,通过构造函数的大小写,应该对作为构造函数的文字进行大写化？

我意识到这里有很多问题讨论新的和Object.create,但它们通常似乎与Duck.prototype = new Animal()有关;而Duck.prototype = Object.create(Animal.prototypE);