My-Java-Script--Programs/Budget Tracker JavaScript.txt at main · msrihanreddy5-code/My-Java-Script--Programs · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Budget Tracker</title>
  <link rel="stylesheet" href="styles.css">
</head>
<body>
  <div class="container">
    <h1>Budget Tracker</h1>
    <form id="entry-form">
      <input type="number" id="amount" placeholder="Amount" required>
      <input type="text" id="category" placeholder="Category" required>
      <select id="type">
        <option value="income">Income</option>
        <option value="expense">Expense</option>
      </select>
      <button type="submit">Add Entry</button>
      <button type="button" id="undo">Undo</button>
    </form>
    <div id="alert"></div>
    <div>
      <label>Show Chart:</label>
      <select id="chart-type">
        <option value="weekly">Weekly</option>
        <option value="monthly">Monthly</option>
      </select>
    </div>
    <canvas id="chart" width="400" height="200"></canvas>
    <ul id="entries"></ul>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
  <script src="app.js"></script>
</body>
</html>
body {
  font-family: Arial, sans-serif;
  background: #f7f7f7;
}

.container {
  max-width: 450px;
  margin: 30px auto;
  background: #fff;
  padding: 25px;
  border-radius: 9px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.11);
}

h1 {
  text-align: center;
}

form {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

#alert {
  color: red;
  font-weight: bold;
  margin: 12px 0;
  min-height: 20px;
}

#entries {
  margin-top: 22px;
  list-style: none;
  padding: 0;
}

#entries li {
  padding: 7px 0;
  border-bottom: 1px solid #eee;
  display: flex;
  justify-content: space-between;
}

#entries .income { color: green; }
#entries .expense { color: crimson; }
const form = document.getElementById('entry-form');
const entriesList = document.getElementById('entries');
const alertBox = document.getElementById('alert');
const chartType = document.getElementById('chart-type');
const undoBtn = document.getElementById('undo');

let entries = JSON.parse(localStorage.getItem('budgetEntries') || '[]');
let budget = 500; // Set your budget limit

function saveEntries() {
  localStorage.setItem('budgetEntries', JSON.stringify(entries));
}

function renderEntries() {
  entriesList.innerHTML = '';
  entries.slice().reverse().forEach((entry, idx) => {
    const li = document.createElement('li');
    li.innerHTML = `
      <span class="${entry.type}">${entry.type === 'income' ? '+' : '-'}$${entry.amount} (${entry.category})</span>
      <span>${new Date(entry.date).toLocaleDateString()}</span>
    `;
    entriesList.appendChild(li);
  });
}

function getTotalExpense() {
  return entries.filter(e => e.type === 'expense').reduce((t, e) => t + Number(e.amount), 0);
}

function showAlertIfOverBudget() {
  const expense = getTotalExpense();
  if (expense > budget) {
    alertBox.textContent = `Alert: You are over budget! ($${expense} > $${budget})`;
  } else {
    alertBox.textContent = '';
  }
}

function addEntry(amount, category, type) {
  entries.push({
    amount: Number(amount),
    category,
    type,
    date: new Date().toISOString()
  });
  saveEntries();
  renderEntries();
  showAlertIfOverBudget();
  renderChart();
}

form.addEventListener('submit', e => {
  e.preventDefault();
  const amount = form.amount.value;
  const category = form.category.value;
  const type = form.type.value;
  if (amount <= 0 || !category) return;
  addEntry(amount, category, type);
  form.amount.value = '';
  form.category.value = '';
});

undoBtn.addEventListener('click', () => {
  if (entries.length === 0) return;
  entries.pop();
  saveEntries();
  renderEntries();
  showAlertIfOverBudget();
  renderChart();
});

// --- Chart code ---
let chart;
function renderChart() {
  const type = chartType.value;
  const now = new Date();
  let labels = [], dataIncome = [], dataExpense = [];
  if (type === 'weekly') {
    // Last 7 days
    for (let i = 6; i >= 0; i--) {
      const d = new Date(now);
      d.setDate(now.getDate() - i);
      labels.push(d.toLocaleDateString().slice(0,5));
      let income = 0, expense = 0;
      entries.forEach(e => {
        const ed = new Date(e.date);
        if (ed.toDateString() === d.toDateString()) {
          if (e.type === 'income') income += Number(e.amount);
          else expense += Number(e.amount);
        }
      });
      dataIncome.push(income);
      dataExpense.push(expense);
    }
  } else {
    // Last 6 months
    for (let i = 5; i >= 0; i--) {
      const d = new Date(now.getFullYear(), now.getMonth() - i, 1);
      labels.push(d.toLocaleString('default', { month: 'short' }));
      let income = 0, expense = 0;
      entries.forEach(e => {
        const ed = new Date(e.date);
        if (ed.getFullYear() === d.getFullYear() && ed.getMonth() === d.getMonth()) {
          if (e.type === 'income') income += Number(e.amount);
          else expense += Number(e.amount);
        }
      });
      dataIncome.push(income);
      dataExpense.push(expense);
    }
  }

  if (chart) chart.destroy();
  chart = new Chart(document.getElementById('chart'), {
    type: 'bar',
    data: {
      labels,
      datasets: [
        { label: 'Income', data: dataIncome, backgroundColor: 'rgba(0,200,0,0.3)' },
        { label: 'Expense', data: dataExpense, backgroundColor: 'rgba(200,0,0,0.3)' }
      ]
    },
    options: {
      scales: { y: { beginAtZero: true } }
    }
  });
}

chartType.addEventListener('change', renderChart);

renderEntries();
showAlertIfOverBudget();
renderChart();