day04—JavaScript之面向对象

转行学开发，代码100天——2018-03-20

对象是变量的容器，是键值对的容器，也是属性和方法的容器。

万物接对象

1.JavaScript中对象定义的方式

方法一：new Object()

//1.new Object()方式
    people =new Object();
    people.name="Allen";
    people.age="28";
    people.work="Engeneer";

    document.write("name:"+people.name+",age:"+people.age+",work:"+people.work);

方法二：{键值对} 

多个键值对之间用,隔开

//2.{键值对}  多个键值对之间用,隔开
    var people=    {
        name:"Allen",
        age:"28",
        work:"Engeneer"
    };

    document.write("name:"+people.name+",age:"+people.age+",work:"+people.work);

 方法三：函数方法。通过定义函数创建对象。

//3.函数方式创建对象
    function people(name,age)
    {
        this._name = name;
        this._age = age;

    }
    al = new people("Allen","28");
    document.write("name:"+al._name+",age:"+al._age);

2、对象属性的调用

对象属性的调用方式有两种，即   .property 或 ["property"]

people.name或

people["name"]

 3、对象方法作为一个函数定义存储在对象属性中，

//对象方法作为一个函数定义存储在对象属性中
    var people =
    {
        name:"Allen",
        age:"28",
        work:"Engeneer",
        fullInfo:function()
        {
            return this.name+this.age+this.work;
        }
    }

    document.write(people.fullInfo());