How to Create a Loan Calculator App with React and JavaScript

How to Create a Loan Calculator App with React and JavaScript

Learn how to create a loan calculator app with React and JavaScript. React is an easy-to-use JavaScript framework that lets us create front-end apps. In this article, we’ll look at how to create a loan calculator app with React and JavaScript. We can create the React project with Create React App.

React is an easy-to-use JavaScript framework that lets us create front-end apps.

In this article, we’ll look at how to create a loan calculator app with React and JavaScript.

Create the Project

We can create the React project with Create React App.

To install it, we run:

npx create-react-app loan-calculator

with NPM to create our React project.

Create the Loan Calculator App

To create the loan calculator app, we write:

import React, { useState } from "react";

export default function App() {
  const [loanAmount, setLoanAmount] = useState(0);
  const [interestRate, setInterestRate] = useState(0);
  const [numMonths, setNumMonth] = useState(0);
  const [monthlyPayment, setMonthlyPayment] = useState(0);
  const calculate = (e) => {
    e.preventDefault();
    const formValid =
      +loanAmount >= 0 &&
      0 <= +interestRate &&
      +interestRate <= 100 &&
      +numMonths > 0;
    if (!formValid) {
      return;
    }
    setMonthlyPayment((+loanAmount * (1 + +interestRate / 100)) / +numMonths);
  };

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