TS——抽象类

Posted 2023-02-28 小姚同学要继续加油呀

// 抽象类不能创建实例
(function () 
  abstract class Animal 
    name: string;
    constructor(name: string) 
      this.name = name;
    
    // 抽象方法只能且必须在子类进行重写
    abstract sayHi(): void;
  

  class Dog extends Animal 
    sayHi() 
      console.log("hihihi");
    
  
  class Cat extends Animal 
    constructor(name: string) 
      super(name);
    
    sayHi() 
      console.log("hi");
    
  
)();