How to calculate shopping cart total - reactjs

Question

I have been working on a webpage for a while and am having trouble calculating the total for my shopping list products. I have created a "price" variable in another file, as well as a state for "quantity" in another file, and would like to be able to multiply these two variables together to calculate the "Total". The code for doing this, I have is as follows:
import React, { useEffect, useState } from 'react'
import { useDispatch } from 'react-redux';
import {
getCartItems,
removeCartItem,
onSuccessBuy
} from '../../../_actions/user_actions';
import UserCardBlock from './Sections/UserCardBlock';
import { Result, Empty } from 'antd';
import Axios from 'axios';
import Paypal from '../../utils/Paypal';
function CartPage(props) {
const dispatch = useDispatch();
const [Total, setTotal] = useState(0)
const [ShowTotal, setShowTotal] = useState(false)
const [ShowSuccess, setShowSuccess] = useState(false)
useEffect(() => {
let cartItems = [];
if (props.user.userData && props.user.userData.cart) {
if (props.user.userData.cart.length > 0) {
props.user.userData.cart.forEach(item => {
cartItems.push(item.id)
});
dispatch(getCartItems(cartItems, props.user.userData.cart))
.then((response) => {
if (response.payload.length > 0) {
calculateTotal(response.payload)
}
})
}
}
}, [props.user.userData])
const calculateTotal = (cartDetail) => {
let total = 0;
cartDetail.map(props => {
total += parseInt(props.productData.price, 10) * props.productData.price
});
setTotal(total)
setShowTotal(true)
}
const removeFromCart = (productId) => {
dispatch(removeCartItem(productId))
.then((response) => {
if (response.payload.cartDetail.length <= 0) {
setShowTotal(false)
} else {
calculateTotal(response.payload.cartDetail)
}
})
}
const transactionSuccess = (data) => {
dispatch(onSuccessBuy({
cartDetail: props.user.cartDetail,
paymentData: data
}))
.then(response => {
if (response.payload.success) {
setShowSuccess(true)
setShowTotal(false)
}
})
}
const transactionError = () => {
console.log('Paypal error')
}
const transactionCanceled = () => {
console.log('Transaction canceled')
}
return (
<div style={{ width: '85%', margin: '3rem auto' }}>
<h1>My Cart</h1>
<div>
<UserCardBlock
productData={props.location.state.data}
products={props.user.cartDetail}
removeItem={removeFromCart}
/>
<div style={{ marginTop: '3rem' }}>
<h2>Total amount: ${Total} </h2>
</div>
</div>
{/* Paypal Button */}
{ShowTotal &&
<Paypal
toPay={Total}
onSuccess={transactionSuccess}
transactionError={transactionError}
transactionCanceled={transactionCanceled}
/>
}
</div>
)
}
export default CartPage
Does this look correct? I am a little confused about what to put in the function before the arrows. I know I am doing something wrong... just not sure what. Any help is greatly appreciated. Thank you

Answer 1

the mapping look correct. are you concern about the mapping or the way you change the data? and maybe you can provide more code