[https://segmentfault.com/a/1190000016708006](https://segmentfault.com/a/1190000016708006) ## 方式一、原型链继承 这种方式关键在于:**子类型的原型为父类型的一个实例对象。** ~~~ //父类型 function Person(name, age) { this.name = name, this.age = age, this.play = [1, 2, 3]， this.setName = function () { } } Person.prototype.setAge = function () { } //子类型 function Student(price) { this.price = price this.setScore = function () { } } //Student.prototype默认是指向Object空对象的 Student.prototype = new Person() // 子类型的原型为父类型的一个实例对象 var s1 = new Student(15000) var s2 = new Student(14000) console.log(s1,s2) ~~~