class

基础

class Person {
  name: string;
  age: number;
  constructor(name: string, age: number) {
    this.name = name;
    this.age = age;
  }
  callName() {
    console.log(this.name);
  }
}

继承

class Animal {
  constructor(age) {
    this.age = age;
  }
  run() {}
}
class Cat extends Animal {
  constructor(name: string, age: number) {
    super(age);
    this.name = name;
  }
  callName() {}
}

TIP

• TS 中 interface 可以继承 class

属性封装&语法糖

class Person {
  static readonly age = "静态";
  readonly name = "名字";
  get privacy() {
    return this.privacy;
  }
  set privacy(value) {
    this.privacy = value;
  }
  constructor(
    public name: string,
    private age: number,
    protected gender: string
  ) {
    //this.xxx = xxx 不用写了
  }
}

抽象类

abstract class Human {}
class Person extends Human {}
const per = new Human(); //飘红

WARNING

• 抽象类只能被继承，不能被实例