lovecoding
/
W250511


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 构造函数
        function Person(name,age){
            this.username = name;
            this.age = age;
        }
        // 原型上写方法
        Person.prototype.talk = function(){
            console.log(`我叫${this.username},我今年${this.age}岁`)
        }

        // 继承
        function Teacher(name,age,school ){
            // 调用父类的构造函数
            Person.call(this,name,age);
            this.school = school;
        }
        
        // 继承父类的方法
        Teacher.prototype = Person.prototype;
        // 修复构造函数指向
        Teacher.prototype.constructor = Teacher;
        // 自己独有的方法
        Teacher.prototype.showSchool = function(){
            console.log(`我是${this.username},我来自${this.school}`)
        }

        // 实例化对象
        let t1 = new Teacher("王五",30,"清华大学");
        console.log(t1.username)
        t1.talk();
        t1.showSchool();
        console.log(t1.constructor);

    </script>
</body>
</html>