class 类的继承

class是一个对象{},constructor是一个函数(){}

   // 我要被下面所继承
        class Game {
            constructor(name, type) {
                this.name = name
                this.type = type
            }
        }

 // 我要继承上面的属性
        class Role extends Game { //语法: 要继承 extends 被继承
            constructor(roleName, hit, sex, game_name, game_type) { //这里要将被继承的属性写入形参,下面用super接受
                super(game_name, game_type) //super需要接受上面的形参
                this.roleName = roleName
                this.hit = hit
                this.sex = sex
            }
            dance() {
                console.log('跳舞');
            }
        }

实例化对象

 let game = new Role('程咬金', '800点攻击力', '男', '王者荣耀', '手游')
        console.log(game);
        game.dance()

完整写法如下

  // 我要被下面所继承
        class Game {
            constructor(name, type) {
                this.name = name
                this.type = type
            }
        }
        // 我要继承上面的属性
        class Role extends Game { //语法: 要继承 extends 被继承
            constructor(roleName, hit, sex, game_name, game_type) { //这里要将被继承的属性写入形参,下面用super接受
                super(game_name, game_type) //super需要接受上面的形参
                this.roleName = roleName
                this.hit = hit
                this.sex = sex
            }
            dance() {
                console.log('跳舞');
            }
        }

        let game = new Role('程咬金', '800点攻击力', '男', '王者荣耀', '手游')
        console.log(game);
        game.dance()

效果图