在类里面可以去定义一些getter和setter,getter可以得到一些东西的方法,setter可以设置东西
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class Chef{
constructor(food){ this .food = food;
thid.dish = []; } //getter
get menu(){ return this .dish
} //setter
set menu(dish){ this .dish.push(dish)
} cook(){ console.log( this .food)
} } let zhangsan = new Chef();
console.log(zhangsan.menu = 'tomato' ); //tomato
console.log(zhangsan.menu = 'pizza' ); //pizza
console.log(zhangsan.menu); //["tomato","pizza"]
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