JavaScript 面向对象：揭开创建对象的奥秘

2023-10-18 07:53:59

# JavaScript 的对象世界#

在 JavaScript 中，对象是保存数据的容器，它由属性和方法组成。属性是对象的状态，方法是对象的行为。我们可以通过各种方式创建一个对象。

## 创建对象的方式#

1. 字面量的方式创建对象

const person = {
  name: "John",
  age: 30,
  gender: "male",
  greet: function() {
    console.log(`Hello, my name is ${this.name}`);
  }
};

2. 构造函数的方式创建对象

function Person(name, age, gender) {
  this.name = name;
  this.age = age;
  this.gender = gender;
  this.greet = function() {
    console.log(`Hello, my name is ${this.name}`);
  }
}

const person = new Person("John", 30, "male");

3. `Object.create()` 的方式创建对象

const person = Object.create(null, {
  name: {
    value: "John",
    enumerable: true,
    configurable: true,
    writable: true
  },
  age: {
    value: 30,
    enumerable: true,
    configurable: true,
    writable: true
  },
  gender: {
    value: "male",
    enumerable: true,
    configurable: true,
    writable: true
  },
  greet: {
    value: function() {
      console.log(`Hello, my name is ${this.name}`);
    },
    enumerable: true,
    configurable: true,
    writable: true
  }
});