<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>$永远的24k纯帅$</title>
<script>
//自定义构造函数创建对象,我要自己定义一个构造函数,自定义构造函数,创建对象
//函数和构造函数的区别；名字是不是大写(首字母是大写)
function Person(name,age) {
this.name=name;
this.age=age;
this.sayHi=function () {
console.log("我叫:"+this.name+",年龄是:"+this.age);
};
}
//自定义构造函数创建对象:先自定义一个构造函数,创建对象
var obj=new Person("小明",10);
console.log(obj.name);
console.log(obj.age);
obj.sayHi();
var obj2=new Person("小红",20);
console.log(obj2.name);
console.log(obj2.age);
obj2.sayHi();
console.log(obj instanceof Person);
console.log(obj2 instanceof Person);
//自定义狗的构造函数,创建对象
function Dog(name,age,sex) {
this.name=name;
this.age=age;
this.sex=sex;
}
var dog=new Dog("大黄",20,"男");
console.log(dog instanceof Person);//false
console.log(dog instanceof Dog);
</script>
</head>
<body>
</body>
</html>