面向对象－概念

class People {
    constructor (name, age) {
        this.name = name
        this.age = age
    }
    eat() {
        alert(`${this.name} eat something`)
    }
    speak() {
        alert(`my name is ${this.name}, age ${this.age}`)
    }
}

// 创建实例
let zina = new People(‘zina‘, 20);
zina.eat();
zina.speak();

// 创建实例
let wzn = new People(‘wzn‘, 21);
wzn.eat();
wzn.speak();