class 类的继承

1. 子类可以继承父类的全部内容（包括静态方法）

{

        class Person {
            constructor(n, s) {
                this.name = n;
                this.sex = s;
            }

            eat() {
                console.log("吃饭");
            }
            static work() {
                console.log("静态方法");
            }
        }
        class Children extends Person {
            constructor() {
                super();//调用父类的构造函数
            }
        }
        let s = new Children();
        console.log(s);
        Children.work();//静态方法
    }
           

1. 多个继承

{

        class Person {
            constructor(n, s) {
                this.name = n;
                this.sex = s;
            }

            eat() {
                console.log("吃饭");
            }

            static work() {
                console.log("....");
            }
        }
        class Children extends Person {
            constructor(m, n, s) {
                super(n, s)
                this.money = m;
            }
        }
        class Student extends Children {
            constructor(n, s) {
                super("钱", n, s);//调用父类的构造函数
            }

            job() {
                console.log("上学");
            }
        }
        let s = new Student();
        console.log(s);
    }