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Merged
venisha-kalola merged 1 commit into from
Oct 22, 2025
Merged

Improved the expense tracker website #118

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107 changes: 82 additions & 25 deletions projects/expense-tracker/index.html
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Open in desktop
Original file line number Diff line number Diff line change
@@ -1,30 +1,87 @@
<!doctype html>
<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Expense Tracker</title>
<link rel="stylesheet" href="./styles.css">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Expense Tracker</title>
<link rel="stylesheet" href="styles.css">
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>

<body>
<main>
<h1>Expense Tracker</h1>

<form id="form">
<input id="desc" placeholder="Description" required />
<input id="amount" type="number" step="0.01" placeholder="Amount" required />
<button type="submit">Add</button>
</form>

<ul id="list"></ul>
<canvas id="chart" width="300" height="150"></canvas>

<button id="exportBtn">Export as CSV</button>
<p class="notes">Add categories, charts, and filters.</p>
</main>
<script type="module" src="./main.js"></script>
</body>
<header>
<h1>Expense Tracker</h1>
</header>

<div class="graphs-section">
<div class="chart-box">
<h2>Monthly Expenses</h2>
<canvas id="monthlyChart"></canvas>
</div>
<div class="chart-box">
<h2>Category Distribution</h2>
<canvas id="categoryChart"></canvas>
</div>
</div>

<div class="container">
<!-- LEFT: Add Expense Form -->
<div class="left-panel">
<h2>Add Expense</h2>
<form id="expenseForm">
<label>Description:</label>
<input type="text" id="title" required>

<label>Amount (₹):</label>
<input type="number" id="amount" required>

<label>Category:</label>
<select id="category" required>
<option value="Food">Food</option>
<option value="Transport">Transport</option>
<option value="Shopping">Shopping</option>
<option value="Bills">Bills</option>
<option value="Entertainment">Entertainment</option>
<option value="Other">Other</option>
</select>

</html>
<label>Date:</label>
<input type="date" id="date" required>

<button type="submit">Save Expense</button>
</form>
</div>

<!-- RIGHT: Expense Table -->
<div class="right-panel">
<div class="table-header">
<h2>Expenses</h2>
<div class="filter">
<label for="categoryFilter">Sort by Category:</label>
<select id="categoryFilter">
<option value="all">All</option>
</select>
</div>
</div>

<button id="exportBtn">Export as CSV</button>

<table id="expenseTable">
<thead>
<tr>
<th>Date</th>
<th>Title</th>
<th>Category</th>
<th>Amount (₹)</th>
<th>Action</th>
</tr>
</thead>
<tbody id="tableBody">
<tr><td colspan="5" style="text-align:center;">No data entered</td></tr>
</tbody>
</table>
</div>
</div>

<script src="main.js"></script>
</body>
</html>
242 changes: 173 additions & 69 deletions projects/expense-tracker/main.js
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Original file line number Diff line number Diff line change
@@ -1,71 +1,175 @@
const form = document.getElementById('form');
const desc = document.getElementById('desc');
const amount = document.getElementById('amount');
const list = document.getElementById('list');
const chart = document.getElementById('chart').getContext('2d');
const exportBtn = document.getElementById('exportBtn');

let items = [];

form.addEventListener('submit', e => {
e.preventDefault();
items.push({
id: crypto.randomUUID(),
desc: desc.value,
amount: parseFloat(amount.value) || 0,
date: new Date().toLocaleDateString()
});
desc.value = '';
amount.value = '';
render();
const tableBody = document.getElementById("tableBody");
const exportBtn = document.getElementById("exportBtn");
const categoryFilter = document.getElementById("categoryFilter");
const form = document.getElementById("expenseForm");

const monthlyCtx = document.getElementById("monthlyChart").getContext("2d");
const categoryCtx = document.getElementById("categoryChart").getContext("2d");

let expenses = JSON.parse(localStorage.getItem("expenses")) || [];
let monthlyChart, categoryChart;

function saveExpenses() {
localStorage.setItem("expenses", JSON.stringify(expenses));
}

function updateTable() {
if (expenses.length === 0) {
tableBody.innerHTML = `<tr><td colspan="5" style="text-align:center;">No data entered</td></tr>`;
return;
}

tableBody.innerHTML = "";
expenses.forEach((exp, index) => {
const row = document.createElement("tr");
row.innerHTML = `
<td>${exp.date}</td>
<td>${exp.title}</td>
<td>${exp.category}</td>
<td>₹${exp.amount}</td>
<td><button class="deleteBtn" data-index="${index}">🗑️</button></td>
`;
tableBody.appendChild(row);
});


document.querySelectorAll(".deleteBtn").forEach((btn) =>
btn.addEventListener("click", (e) => {
const i = e.target.getAttribute("data-index");
expenses.splice(i, 1);
saveExpenses();
updateAll();
})
);
}

function updateCategoryFilter() {
const categories = ["all", ...new Set(expenses.map((e) => e.category))];
categoryFilter.innerHTML = categories
.map((cat) => `<option value="${cat}">${cat}</option>`)
.join("");
}

function renderMonthlyChart() {
if (monthlyChart) monthlyChart.destroy();

const monthMap = {};
expenses.forEach((e) => {
const month = e.date ? e.date.slice(0, 7) : "Unknown"; // YYYY-MM
monthMap[month] = (monthMap[month] || 0) + parseFloat(e.amount);
});

const labels = Object.keys(monthMap);
const data = Object.values(monthMap);

monthlyChart = new Chart(monthlyCtx, {
type: "bar",
data: {
labels,
datasets: [
{
label: "Total Monthly Expense (₹)",
data,
backgroundColor: "#6200ea",
},
],
},
options: {
responsive: true,
scales: { y: { beginAtZero: true } },
},
});
}

function renderCategoryChart() {
if (categoryChart) categoryChart.destroy();

const categoryTotals = {};
expenses.forEach((e) => {
categoryTotals[e.category] =
(categoryTotals[e.category] || 0) + parseFloat(e.amount);
});

const labels = Object.keys(categoryTotals);
const data = Object.values(categoryTotals);

categoryChart = new Chart(categoryCtx, {
type: "pie",
data: {
labels,
datasets: [
{
data,
backgroundColor: [
"#ff6384",
"#36a2eb",
"#ffce56",
"#4caf50",
"#ff9800",
"#9c27b0",
],
},
],
},
options: { responsive: true },
});
}

exportBtn.addEventListener("click", () => {
if (expenses.length === 0) return alert("No data to export!");
let csvContent = "data:text/csv;charset=utf-8,Date,Title,Category,Amount\n";
expenses.forEach((e) => {
csvContent += `${e.date},${e.title},${e.category},${e.amount}\n`;
});
const encodedUri = encodeURI(csvContent);
const link = document.createElement("a");
link.setAttribute("href", encodedUri);
link.setAttribute("download", "expenses.csv");
document.body.appendChild(link);
link.click();
});

form.addEventListener("submit", (e) => {
e.preventDefault();
const title = document.getElementById("title").value.trim();
const amount = parseFloat(document.getElementById("amount").value);
const category = document.getElementById("category").value;
const date = document.getElementById("date").value;

if (!title || !amount || !category || !date)
return alert("Please fill all fields!");

expenses.push({ title, amount, category, date });
saveExpenses();
form.reset();
updateAll();
});

function updateAll() {
updateTable();
updateCategoryFilter();
renderMonthlyChart();
renderCategoryChart();
}

categoryFilter.addEventListener("change", (e) => {
const filter = e.target.value;
if (filter === "all") updateAll();
else {
const filtered = expenses.filter((ex) => ex.category === filter);
tableBody.innerHTML = "";
filtered.forEach((exp) => {
const row = document.createElement("tr");
row.innerHTML = `
<td>${exp.date}</td>
<td>${exp.title}</td>
<td>${exp.category}</td>
<td>₹${exp.amount}</td>
<td></td>
`;
tableBody.appendChild(row);
});
}
});

function render() {
list.innerHTML = '';
let total = 0;
for (const it of items) {
total += it.amount;
const li = document.createElement('li');
li.textContent = `${it.date} — ${it.desc} — ₹${it.amount.toFixed(2)}`;
list.appendChild(li);
}
drawChart(total);
}

function drawChart(total) {
const w = 300, h = 150;
chart.clearRect(0, 0, w, h);
chart.fillStyle = '#17171c';
chart.fillRect(0, 0, w, h);
chart.fillStyle = '#6ee7b7';
chart.fillRect(0, h - (total % h), w, (total % h));
}

// --- CSV Export Feature ---
function exportCSV() {
if (items.length === 0) {
alert('No expenses to export!');
return;
}

// Convert items to CSV format
const headers = ['Date', 'Description', 'Amount (INR)'];
const rows = items.map(it => [it.date, it.desc, it.amount]);
const csvContent = [headers, ...rows]
.map(row => row.map(val => `"${val}"`).join(','))
.join('\\n');

// Create and trigger download
const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = `expenses-${new Date().toISOString().slice(0, 10)}.csv`;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
URL.revokeObjectURL(url);
}

exportBtn.addEventListener('click', exportCSV);
render();
window.addEventListener("DOMContentLoaded", updateAll);
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