ご覧いただきありがとうございます
reactで割り勘アプリを作成しています
javascript
import { createRoot } from 'react-dom/client' import CalcButton from '../components/CalcButton' import {Box} from '@material-ui/core'; import {TextField} from '@material-ui/core'; import { useForm } from "react-hook-form" import React, { useState } from 'react'; const MultiTop = () => { type FormData = { totalAmount : number; leaderNumber : number; leaderRate : number; memberNumber : number; memberRate : number; } let [collectAmount, setCollect] = useState(0); let [leaderPay, setLeader] = useState(0); let [memberPay, setMember] = useState(0); let [leaderTotal, setLeaderTotal] = useState(0); let [memberTotal, setMemberTotal] = useState(0); let [collectTotal , setCollectTotal] = useState(0); const { register, handleSubmit } = useForm() const onSubmit = (data) => { let standardValue = data.totalAmount / (data.leaderNumber * data.leaderRate + data.memberNumber * data.memberRate); leaderPay = setLeader(Math.round(standardValue * data.leaderRate/1000)*1000); memberPay = setMember(Math.round(standardValue * data.memberRate/1000)*1000); console.log(leaderPay); leaderTotal = setLeaderTotal(leaderPay * data.leaderNumber); memberTotal = setMemberTotal(memberPay * data.memberNumber); collectTotal = leaderTotal + memberTotal + maleTotal + femaleTotal; } return ( <form onSubmit={handleSubmit(onSubmit)} class="bg-gray-300 w-screen h-screen flex flex-col items-center justify-center space-y-4" > <input placeholder="合計金額" {...register("totalAmount")} /> <div class="sample3"> <div class="item">リーダー</div> <input placeholder="リーダー人数" {...register("leaderNumber")} /> <input placeholder="リーダー比率" {...register("leaderRate")} /> <div class="item">メンバー</div> <input placeholder="メンバー人数" {...register("memberNumber")} /> <input placeholder="メンバー比率" {...register("memberRate")} /> <input type="submit" value="計算する" /> <div class="item">集金総額</div> <div>リーダーの支払額{leaderPay}円 × = {leaderTotal}円</div> <div>メンバーの支払額{memberPay}円 × = {memberTotal}円</div> <div>集金総額 {collectTotal} 円 </div> </form> ) } export default MultiTop
リーダー一人当たりの支払額(leaderPay)から
リーダーの支払い総額(leaderTotal)を算出しようと
leaderTotal = setLeaderTotal(leaderPay * data.leaderNumber);
の処理を書いたのですがundefinedとなってしまいました。
console.logで確認したところleaderPayもundefinedに
なっていました。useStateした値を同じ関数内で計算に使うことはできないのでしょうか?
まだ回答がついていません
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