Javascript 在React中计算总价
这是我第一次尝试用React。 我得计算一下预订的(总)价格 预订价格由以下几个因素决定:Javascript 在React中计算总价,javascript,reactjs,oop,components,calculator,Javascript,Reactjs,Oop,Components,Calculator,这是我第一次尝试用React。 我得计算一下预订的(总)价格 预订价格由以下几个因素决定: 船长:每米1.25欧元 人数:每人1欧元 用电:每天1.25欧元 假设这艘船有10米长,船上有两个人在用电。他们呆了两天。计算如下所示: 船长(10)*1.25*2=25 人数(2)*1*2=4 使用电量(真实)=1.25*2=2.5 总价=25欧元+4欧元+2.5欧元=21.5欧元 我尝试在代码中实现这一点,如下所示: import React, { Component } from 'reac
- 船长:每米1.25欧元
- 人数:每人1欧元
- 用电:每天1.25欧元
- 船长(10)*1.25*2=25
- 人数(2)*1*2=4
- 使用电量(真实)=1.25*2=2.5
- 总价=25欧元+4欧元+2.5欧元=21.5欧元
import React, { Component } from 'react'
import BoatForm from "./BoatForm";
import StayForm from "./StayForm";
export default class PriceCalculator extends Component {
/**
* So, we created a form for the customers so that they can register their boat.
* Now we want to let them know how much their reservation costs.
* The size of the boat, amount of people, amount of days and use of electricity are all parameters.
*/
constructor(props) {
super(props)
this.state = {
boat_length: '',
amount_of_people: '',
arrival_date: '',
leave_date: '',
use_of_electricity: '',
box_number: ''
}
}
/**
* We use date fields in our form to define the stay date of the customer.
* That means we have to calculate the days ourselves.
*/
calculateStayTime() {
const ArrivalDate = new Date(this.state.arrival_date);
const LeaveDate = new Date(this.state.leave_date);
// calculate difference
const DiffTime = Math.abs(LeaveDate - ArrivalDate);
const DiffDays = Math.ceil(DiffTime / (1000 * 60 * 60 * 24));
let AmountOfDays = DiffDays;
return AmountOfDays;
}
/**
* Prices per day:
* - Price per meter: 1,25
* - Price per person: 1
* - Price for using electricity: 1,25
*/
calculatePrice() {
const BoatLength = this.state.boat_length;
const meter_price = 1.25;
const Persons = this.state.amount_of_people;
const persons_price = 1;
let price_per_day = BoatLength * meter_price + Persons * persons_price;
const electricity_price = 1.25;
const use_of_electricity = true;
// ? = if statement
price_per_day = price_per_day + (use_of_electricity ? electricity_price : 0);
// const total_price = price_per_day * AmountOfDays;
}
}
我很难将变量从calculateStatime()传递到calculatePrice()。有谁能帮我制定React.JS的计算公式吗?您需要在
calculatePrice
中使用CalculateTime
的结果。您可以将停留时间值指定给变量,但我可能只替换最后一行://const total\u price=price\u per\u day*AmountOfDays代码>可以替换为const total_price=price_per_day*this.calculatesTime()
应该提供您所需的信息。您需要在calculatePrice
中使用calculatetime
的结果。您可以将停留时间值指定给变量,但我可能只替换最后一行://const total\u price=price\u per\u day*AmountOfDays代码>可以替换为const total_price=price_per_day*this.calculatesTime()代码>它应该能满足您的需要。谢谢!这确实有帮助。现在时间与价格挂钩:)@epnic如果解决了您的问题,请接受答案:)谢谢!这确实有帮助。现在时间与价格挂钩:)@epnic如果解决了您的问题,请接受答案:)