Expense Tracker Project with JavaScript, HTML and CSS

In this tutorial, we will learn how to develop an Expense Tracker Project with plain JavaScript, HTML, and CSS.

Expense Tracker

This simple project keeps track of income and expenses. We will add, remove and save items to/from local storage.

Project Specifications

  • Create UI for project
  • Display transaction items in DOM
  • Show balance, expense, and income totals
  • Add new transaction and reflect in total
  • Delete items from DOM
  • Persist to local storage

Expense Tracker Project with JavaScript, HTML, and CSS

Create a folder called expense-tracker as the project workspace and we will create all the project files inside this folder.

1. index.html

Let's create index.html and add the following code to it:

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <link rel="stylesheet" href="style.css" />
    <title>Expense Tracker</title>
  </head>
  <body>
    <h2>Expense Tracker</h2>

    <div class="container">
      <h4>Your Balance</h4>
      <h1 id="balance">$0.00</h1>

      <div class="inc-exp-container">
        <div>
          <h4>Income</h4>
          <p id="money-plus" class="money plus">+$0.00</p>
        </div>
        <div>
          <h4>Expense</h4>
          <p id="money-minus" class="money minus">-$0.00</p>
        </div>
      </div>

      <h3>History</h3>
      <ul id="list" class="list">
        <!-- <li class="minus">
          Cash <span>-$400</span><button class="delete-btn">x</button>
        </li> -->
      </ul>

      <h3>Add new transaction</h3>
      <form id="form">
        <div class="form-control">
          <label for="text">Text</label>
          <input type="text" id="text" placeholder="Enter text..." />
        </div>
        <div class="form-control">
          <label for="amount"
            >Amount <br />
            (negative - expense, positive - income)</label
          >
          <input type="number" id="amount" placeholder="Enter amount..." />
        </div>
        <button class="btn">Add transaction</button>
      </form>
    </div>
    <script src="script.js"></script>
  </body>
</html>

2. script.js

Let's create a JavaScript file named script.js and add the following JavaScript code to it:

const balance = document.getElementById('balance');
const money_plus = document.getElementById('money-plus');
const money_minus = document.getElementById('money-minus');
const list = document.getElementById('list');
const form = document.getElementById('form');
const text = document.getElementById('text');
const amount = document.getElementById('amount');

// const dummyTransactions = [
//   { id: 1, text: 'Flower', amount: -20 },
//   { id: 2, text: 'Salary', amount: 300 },
//   { id: 3, text: 'Book', amount: -10 },
//   { id: 4, text: 'Camera', amount: 150 }
// ];

const localStorageTransactions = JSON.parse(
  localStorage.getItem('transactions')
);

let transactions =
  localStorage.getItem('transactions') !== null ? localStorageTransactions : [];

// Add transaction
function addTransaction(e) {
  e.preventDefault();

  if (text.value.trim() === '' || amount.value.trim() === '') {
    alert('Please add a text and amount');
  } else {
    const transaction = {
      id: generateID(),
      text: text.value,
      amount: +amount.value
    };

    transactions.push(transaction);

    addTransactionDOM(transaction);

    updateValues();

    updateLocalStorage();

    text.value = '';
    amount.value = '';
  }
}

// Generate random ID
function generateID() {
  return Math.floor(Math.random() * 100000000);
}

// Add transactions to DOM list
function addTransactionDOM(transaction) {
  // Get sign
  const sign = transaction.amount < 0 ? '-' : '+';

  const item = document.createElement('li');

  // Add class based on value
  item.classList.add(transaction.amount < 0 ? 'minus' : 'plus');

  item.innerHTML = `
    ${transaction.text} <span>${sign}${Math.abs(
    transaction.amount
  )}</span> <button class="delete-btn" onclick="removeTransaction(${
    transaction.id
  })">x</button>
  `;

  list.appendChild(item);
}

// Update the balance, income and expense
function updateValues() {
  const amounts = transactions.map(transaction => transaction.amount);

  const total = amounts.reduce((acc, item) => (acc += item), 0).toFixed(2);

  const income = amounts
    .filter(item => item > 0)
    .reduce((acc, item) => (acc += item), 0)
    .toFixed(2);

  const expense = (
    amounts.filter(item => item < 0).reduce((acc, item) => (acc += item), 0) *
    -1
  ).toFixed(2);

  balance.innerText = `$${total}`;
  money_plus.innerText = `$${income}`;
  money_minus.innerText = `$${expense}`;
}

// Remove transaction by ID
function removeTransaction(id) {
  transactions = transactions.filter(transaction => transaction.id !== id);

  updateLocalStorage();

  init();
}

// Update local storage transactions
function updateLocalStorage() {
  localStorage.setItem('transactions', JSON.stringify(transactions));
}

// Init app
function init() {
  list.innerHTML = '';

  transactions.forEach(addTransactionDOM);
  updateValues();
}

init();

form.addEventListener('submit', addTransaction);

3. style.css

Let's create a CSS file named style.css and add the following CSS code to it:

@import url('https://fonts.googleapis.com/css?family=Lato&display=swap');

:root {
  --box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

body {
  background-color: #f7f7f7;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  font-family: 'Lato', sans-serif;
}

.container {
  margin: 30px auto;
  width: 350px;
}

h1 {
  letter-spacing: 1px;
  margin: 0;
}

h3 {
  border-bottom: 1px solid #bbb;
  padding-bottom: 10px;
  margin: 40px 0 10px;
}

h4 {
  margin: 0;
  text-transform: uppercase;
}

.inc-exp-container {
  background-color: #fff;
  box-shadow: var(--box-shadow);
  padding: 20px;
  display: flex;
  justify-content: space-between;
  margin: 20px 0;
}

.inc-exp-container > div {
  flex: 1;
  text-align: center;
}

.inc-exp-container > div:first-of-type {
  border-right: 1px solid #dedede;
}

.money {
  font-size: 20px;
  letter-spacing: 1px;
  margin: 5px 0;
}

.money.plus {
  color: #2ecc71;
}

.money.minus {
  color: #c0392b;
}

label {
  display: inline-block;
  margin: 10px 0;
}

input[type='text'],
input[type='number'] {
  border: 1px solid #dedede;
  border-radius: 2px;
  display: block;
  font-size: 16px;
  padding: 10px;
  width: 100%;
}

.btn {
  cursor: pointer;
  background-color: #9c88ff;
  box-shadow: var(--box-shadow);
  color: #fff;
  border: 0;
  display: block;
  font-size: 16px;
  margin: 10px 0 30px;
  padding: 10px;
  width: 100%;
}

.btn:focus,
.delete-btn:focus {
  outline: 0;
}

.list {
  list-style-type: none;
  padding: 0;
  margin-bottom: 40px;
}

.list li {
  background-color: #fff;
  box-shadow: var(--box-shadow);
  color: #333;
  display: flex;
  justify-content: space-between;
  position: relative;
  padding: 10px;
  margin: 10px 0;
}

.list li.plus {
  border-right: 5px solid #2ecc71;
}

.list li.minus {
  border-right: 5px solid #c0392b;
}

.delete-btn {
  cursor: pointer;
  background-color: #e74c3c;
  border: 0;
  color: #fff;
  font-size: 20px;
  line-height: 20px;
  padding: 2px 5px;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translate(-100%, -50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.list li:hover .delete-btn {
  opacity: 1;
}

Open index.html in Browser

Let's open the index.html file in the browser and you will be able to see the following screen:

More Free JavaScript Projects with Source Code


Related JavaScript Source Code Examples

Adding a Method to a JavaScript Object Create JavaScript Object Using ES 6 Class Create JavaScript Object Using Object.create() method Create JavaScript Object using Constructor Function Create JavaScript Object using Object Literal Example Iterate over Properties of a JavaScript Object Example Delete Property of JavaScript Object Example Add Properties to JavaScript Object Example JavaScript Sequential Search Algorithm Example JavaScript Selection Sort Algorithm Example JavaScript Quick Sort Algorithm Example JavaScript Merge Sort Algorithm Example Find Min Value of an Array in JavaScript Find Max Value of an Array in JavaScript JavaScript Properties Best Practices JavaScript Variables Best Practices JavaScript Arrays Best Practices JavaScript Objects Best Practices JavaScript JSON.stringify() Example JavaScript JSON.parse() Example JavaScript SessionStorage Methods with Examples JavaScript LocalStorage Methods with Examples Lodash _.keys() and _.values() Example Lodash String Case Method Examples Lodash _.sum Method Example Lodash _.min and _.max() Methods Example Lodash _.range Method Example Lodash _.delay Method Example Lodash _.times Method Example Lodash _.shuffle() Method Example Lodash _.reduce Method Example Lodash _.keyBy Method Example Lodash _.random() Method Example Lodash _.slice() Method Example Lodash _.chunk() Method Example Lodash _.find Method Example Lodash _.first() and _.last() Method Examples Lodash _.assign Method Example SessionStorage.key JavaScript Example SessionStorage.clear JavaScript Example SessionStorage.removeItem JavaScript Example SessionStorage.getItem JavaScript Example SessionStorage.setItem JavaScript Example LocalStorage.key JavaScript Example LocalStorage.clear JavaScript Example LocalStorage.removeItem JavaScript Example LocalStorage.getItem JavaScript Example LocalStorage.setItem JavaScript Example

Comments

Post a Comment