JavaScript中ES6中类的定义与使用

class =》类 object =>对象 构造函数=>用来模拟类的函数 es6以后可以使用class来定义类，然后用类来定义对象

实例

<script>
    //class =》类 object =>对象
    //构造函数=>用来模拟类的函数
    //es6以后可以使用class来定义类，然后用类来定义对象
    var methodName = "smoke"
    var proper = "height"//定义类使用方法二
    class People{//名后面不要打括号
        constructor(obj){
            this.name = obj.name;
            this.age = obj.age;
            this.sex = obj.sex;
            this.weight = obj.weight;
            this[proper] = obj.height;//这里传进来height
        }
        eat(){//类中定义方法不需要打function
            console.log(this.name+"is eating");
        }
        study(){
            console.log(this.name + " is study")
            this.weight--;
        }
    }
    var p1 = new People({
        name:"张三",
        age:33,
        sex:"male",
        weight:100
    });
    p1.eat();
    console.log(p1.weight);
    p1.study();
    console.log(p1.weight);
    console.log(p1);
    console.log(People);
    console.log(p1.__proto__)
    p1.__proto__.score = 99;//这种方式可以修改定义该对象的类，
    //而且将会影响所有使用该类定义的对象，不推荐使用
    //---------定义类方法二
    var p2 = new People({
        name:"李四",age:30,sex:"female",weight:80,height:170
    })
    console.log(p2.score);
    p2.smoke();
    console.log(p2.height);
</script>