50 - Expense Tracker

Description

Build an Expense Tracker web application using React to help users keep track of their expenses. The main purpose is to assist users in keeping track of their expenses. With this app, users can easily add, and delete expenses to view a summary of their spending habits as well, and it will show the available balance the user has left.

Algorithm

• Design the UI components:

  • Header: Display the app title and balance

  • ExpenseList: Display a list of expenses

  • ExpenseForm: Allow users to add new expenses

  • Balance: Display the available balance

• Create the logic for adding and deleting expenses:

  • Use a state array to store expenses

  • Use a function to add new expenses to the state array

  • Use a function to delete expenses from the state array

• Calculate the available balance:

  • Use a function to sum up the expenses and subtract from the initial balance

• Render the UI components and logic:

  • Use React hooks to manage state and side effects

  • Use JSX to render the UI components

Classes

• App: The main app component

• Header: The header section component

• ExpenseList: The expense list component

• ExpenseForm: The expense form component

• Balance: The balance component

Code

App.js

import React, { useState, useEffect } from 'react';
import Header from './Header';
import ExpenseList from './ExpenseList';
import ExpenseForm from './ExpenseForm';
import Balance from './Balance';

const App = () => {
  const [expenses, setExpenses] = useState([]);
  const [balance, setBalance] = useState(1000); // initial balance

  useEffect(() => {
    const totalExpenses = expenses.reduce((acc, curr) => acc + curr.amount, 0);
    setBalance(balance - totalExpenses);
  }, [expenses]);

  const addExpense = (expense) => {
    setExpenses((prevExpenses) => [...prevExpenses, expense]);
  };

  const deleteExpense = (id) => {
    setExpenses((prevExpenses) => prevExpenses.filter((expense) => (link unavailable) !== id));
  };

  return (
    <div className="app">
      <Header balance={balance} />
      <ExpenseList expenses={expenses} deleteExpense={deleteExpense} />
      <ExpenseForm addExpense={addExpense} />
      <Balance balance={balance} />
    </div>
  );
};

export default App;

Header.js

import React from 'react';

const Header = ({ balance }) => {
  return (
    <div className="header">
      <h1>Expense Tracker</h1>
      <p>Balance: ${balance}</p>
    </div>
  );
};

export default Header;

ExpenseList.js

import React from 'react';

const ExpenseList = ({ expenses, deleteExpense }) => {
  return (
    <div className="expense-list">
      {expenses.map((expense) => (
        <div key={(link unavailable)}>
          <p>{expense.description}</p>
          <p>${expense.amount}</p>
          <button onClick={() => deleteExpense((link unavailable))}>Delete</button>
        </div>
      ))}
    </div>
  );
};

export default ExpenseList;

ExpenseForm.js

import React from 'react';

const ExpenseForm = ({ addExpense }) => {
  const [description, setDescription] = useState('');
  const [amount, setAmount] = useState(0);

  const handleSubmit = (event) => {
    event.preventDefault();
    addExpense({ description, amount });
    setDescription('');
    setAmount(0);
  };

  return (
    <div className="expense-form">
      <form onSubmit={handleSubmit}>
        <label>Description:</label>
        <input
          type="text"
          value={description}
          onChange={(e) => setDescription(e.target.value)}
        />
        <label>Amount:</label>
        <input
          type="number"
          value={amount}
          onChange={(e) => setAmount(e.target.value)}
        />
        <button type="submit">Add Expense</button>
      </form>
    </div>
  );
};

export default ExpenseForm;

Balance.js

import React from 'react';

const Balance = ({ balance }) => {
  return (
    <div className="balance">
      <p>Available Balance: ${balance}</p>
    </div>
  );
};

export default Balance;

This code creates an Expense Tracker web application using React. Users can add and delete expenses, and the app will display a summary of their spending habits and the available balance. The app uses state and effect hooks to manage the expenses and balance.

Possible Future Enhancements:

• Add authentication and authorization to secure user data

• Implement data storage using a backend service or local storage

• Add filtering and sorting capabilities to the expense list

• Integrate with other financial tools and services

• Improve user experience with animations and transitions