【リファクタリングカタログ】関数群のクラスへの集約 - Qiita

const reading = { customer: "ivan", quantity: 10, month: 5, year: 2017 }; const acquireReading = () => { return reading } const baseRate = (month, year) => 10 const taxThreshold = (year) => 40 class Client1 { #baseCharge constructor() { const aReading = acquireReading(); this.#baseCharge = baseRate(aReading.month, aReading.year) * aReading.quantity; } get baseCharge() { return this.#baseCharge } }