Javascript Class 吸氣劑設置器

Question

我嘗試在 javascript class 和 webpack 中使用 getter setter

為什么.js

class why {
    set setWhy(answer) {
        this._answer = answer
    }

    get getWhy() {
        return this._answer
    }
}

export default why

index.js

import why from'./why.js'

const index = () => {
    why.setWhy = 'i dont know'
    console.log(why.getWhy)
}

但它返回 undefined 為什么？

控制台中未定義的結果

Answer 1

您需要創建一個為什么 class 的 object 以使上述代碼工作：whyObject = new why();

Answer 2

嘗試這個：

const index = () => {
    const whyInst = new why();
    whyInst.setWhy = 'i dont know'
    console.log(whyInst.getWhy)
}