创建javascript对象

var person = {
  name: "John",
  age: 30,
  profession: "Developer"
};

function Person(name, age, profession) {
  this.name = name;
  this.age = age;
  this.profession = profession;
}

var person = new Person("John", 30, "Developer");

var personPrototype = {
  name: "",
  age: 0,
  profession: "",
  introduce: function() {
    console.log("My name is " + this.name + ". I am " + this.age + " years old. I work as a " + this.profession + ".");
  }
};

var person = Object.create(personPrototype);
person.name = "John";
person.age = 30;
person.profession = "Developer";
person.introduce();