构造函数的继承性function people(name,age,color){ this.name=name this.age=age this.color=color}people.prototype.move=function(){ console.log(this.age+"的"+this.name+"正在工作")}people.prototype.sleep=function(){ console.log(this.age+"的"+this.name+"正在睡觉")}function student(name,age,color){ }//原型链继承student.prototype=new people("王一",18,"黑色");student.prototype.mystudents=function(){ console.log("学习")}var s1=new student()s1.move()//冒充继承function teacher(name,age,color){ people.call(this,name,age,color)}teacher.prototype.ming=function(){ console.log("上班")}var lao2=new teacher("老2",33,"白色")console.log(lao2)lao2.move()//混合继承：原型链继承+冒充继承function patriarch(name,age,color){ people.call(this,name,age,color)}patriarch.prototype=new people()patriarch.prototype.zhang=function(){ console.log("教训孩子")}var jia=new patriarch("家1",35,"教育")jia.move()//1.通过原型链继承 存在问题：无法对父类的属性进行初始化，所有的对象的所有属性都是相同的，可以通过 call或者apply方法来实现//2.冒充继承：存在问题 无法继承 父类的原型中的方法//3.混合继承：原型链继承+冒充继承 最优