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>
