11-5 属性继承

call能够实现属性继承

        function Person(name,age){
            this.name = name;
            this.age = age;
        }
        function Teacher(name,age,skill){
            var self = this;
            Person.call(self,name,age)
            this.skill = skill;
        }
        var t = new Teacher("zhang",18,"js");
        console.log(t)

    原型对象:Javascript的继承是基于原型的继承<br />        call能够实现属性的继承

        function Person(name,age){
            this.name = name;
            this.age = age;
        }
        Person.prototype.sayName = function(){
            console.log(this.name)
        }
        function Teacher(name,age,skill){
            Person.call(this,name,age)
            this.skill = skill;
        }
        Teacher.prototype = Person.prototype;
        Teacher.prototype.sayAge = function(){
            console.log(this.age)
        }
        /* 方法的继承 */
        Teacher.prototype.constructor =  Teacher;
        var t = new Teacher("zhang",18,"js");
        var p = new Person("lisi",13);
        console.log(t.constructor)

    1.封装<br />        2.继承<br />        3.多态 (自带多态)

        function Person(name, age) {
            this.name = name;
            this.age = age;
        }
        Person.prototype.sayName = function () {
            console.log(this.name)
        }
        function Teacher(name, age, skill) {
            Person.call(this, name, age)
            this.skill = skill;
        }
        Teacher.prototype =Object.create(Person.prototype,{
            constructor:{
                value:Teacher
            }
        })
        Teacher.prototype.sayAge = function () {
            console.log(this.age)
        }
        var t = new Teacher("zhang", 18, "js");
        console.log(t.constructor)
        t.sayName();