Photo by Mohammad Rahmani on Unsplash
函式方法
| 變數 |
說明 |
| constructor |
建構子 |
| super |
上層類別 |
| instanceof |
判斷是類為指定類別 |
建立類別
class Animal {
constructor(name, color){
this.name = name
this.color = color
}
sayHi(){
console.log(`[Animal] My name is「${this.name}」 My color is 「${this.color}」`);
}
}
const animal = new Animal('Dog','white');
// [Animal] My name is「Dog」 My color is 「white」
animal.sayHi()
繼承類別
class Cat extends Animal {
sayHi() {
console.log(`[Cat] My name is「${this.name}」 My color is 「${this.color}」`);
}
}
const KittyCat = new Cat('Kitty', 'pink');
// [Cat] My name is「Kitty」 My color is 「pink」
KittyCat.sayHi();
呼叫父類別方法
class Cat extends Animal {
sayHi() {
console.log(`[Cat] My name is「${this.name}」 My color is 「${this.color}」`);
super.sayHi();
}
}
const KittyCat = new Cat('Kitty', 'pink')
// [Cat] My name is「Kitty」 My color is 「pink」
// [Animal] My name is「Kitty」 My color is 「pink」
KittyCat.sayHi();
判斷是類為指定類別
console.log(KittyCat instanceof Cat) // true
console.log(KittyCat instanceof Animal) // true
Reference
Donate KJ 贊助作者喝咖啡
如果這篇文章對你有幫助的話，可以透過下面支付方式贊助作者喝咖啡，如果有什麼建議或想說的話可以贊助並留言給我
If this article has been helpful to you, you can support the author by treating them to a coffee through the payment options below. If you have any suggestions or comments, feel free to sponsor and leave a message for me!
