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Add enhanced Bitcoin price tracker with additional features #2

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Add enhanced Bitcoin price tracker with additional features #2

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48 changes: 48 additions & 0 deletions index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Bitcoin Price Tracker</title>
<link rel="stylesheet" href="styles.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.0/chart.min.js"></script>
</head>
<body>
<div class="container">
<h1>Bitcoin Price Tracker</h1>
<div class="price-container">
<div id="price">Loading...</div>
<div id="price-change"></div>
</div>
<div id="timestamp"></div>

<div class="stats-container">
<div class="stat">
<label>24h High</label>
<span id="high-price">-</span>
</div>
<div class="stat">
<label>24h Low</label>
<span id="low-price">-</span>
</div>
<div class="stat">
<label>24h Change</label>
<span id="day-change">-</span>
</div>
</div>

<div class="chart-container">
<canvas id="priceChart"></canvas>
</div>

<div class="settings">
<h3>Price Alerts</h3>
<div class="alert-settings">
<input type="number" id="alertPrice" placeholder="Alert price in USD">
<button onclick="tracker.setAlert()">Set Alert</button>
</div>
</div>
</div>
<script src="tracker.js"></script>
</body>
</html>
118 changes: 118 additions & 0 deletions styles.css
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body {
font-family: Arial, sans-serif;
margin: 0;
padding: 20px;
background-color: #f0f2f5;
}

.container {
max-width: 800px;
margin: 0 auto;
background-color: white;
padding: 20px;
border-radius: 10px;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
text-align: center;
color: #333;
margin-bottom: 30px;
}

.price-container {
text-align: center;
margin-bottom: 20px;
}

#price {
font-size: 48px;
font-weight: bold;
color: #f7931a;
}

#price-change {
font-size: 18px;
margin-top: 5px;
}

#timestamp {
text-align: center;
color: #666;
font-size: 14px;
margin-bottom: 20px;
}

.stats-container {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: 20px;
margin-bottom: 30px;
padding: 20px;
background-color: #f8f9fa;
border-radius: 8px;
}

.stat {
text-align: center;
}

.stat label {
display: block;
color: #666;
margin-bottom: 5px;
}

.stat span {
font-size: 20px;
font-weight: bold;
color: #333;
}

.chart-container {
margin-bottom: 30px;
padding: 20px;
background-color: white;
border-radius: 8px;
box-shadow: 0 1px 3px rgba(0,0,0,0.1);
height: 300px;
}

.settings {
padding: 20px;
background-color: #f8f9fa;
border-radius: 8px;
}

.alert-settings {
display: flex;
gap: 10px;
}

input {
padding: 8px;
border: 1px solid #ddd;
border-radius: 4px;
flex: 1;
}

button {
padding: 8px 16px;
background-color: #f7931a;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
}

button:hover {
background-color: #e88a0c;
}

.price-up {
color: #28a745;
}

.price-down {
color: #dc3545;
}
169 changes: 147 additions & 22 deletions tracker.js
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// Bitcoin Price Tracker

const fetchBitcoinPrice = async () => {
try {
const response = await fetch('https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd');
const data = await response.json();
const price = data.bitcoin.usd;

// Update the UI
document.getElementById('price').textContent = `$${price.toLocaleString()}`;
document.getElementById('timestamp').textContent = new Date().toLocaleString();
} catch (error) {
console.error('Error fetching Bitcoin price:', error);
document.getElementById('price').textContent = 'Error fetching price';
}
};

// Fetch initial price
fetchBitcoinPrice();

// Update price every 2 minutes
setInterval(fetchBitcoinPrice, 120000);
class BitcoinPriceTracker {
constructor() {
this.priceHistory = [];
this.maxHistoryPoints = 24;
this.chart = null;
this.alertPrice = null;
this.initializeChart();
this.loadStoredData();
this.startTracking();
}

loadStoredData() {
const stored = localStorage.getItem('btcPriceHistory');
if (stored) {
this.priceHistory = JSON.parse(stored);
this.updateChart();
this.updateStats();
}
}

saveData() {
localStorage.setItem('btcPriceHistory', JSON.stringify(this.priceHistory));
}

initializeChart() {
const ctx = document.getElementById('priceChart').getContext('2d');
this.chart = new Chart(ctx, {
type: 'line',
data: {
labels: [],
datasets: [{
label: 'Bitcoin Price (USD)',
data: [],
borderColor: '#f7931a',
borderWidth: 2,
fill: false,
tension: 0.1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
beginAtZero: false
}
}
}
});
}

async fetchPrice() {
try {
const response = await fetch('https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd');
const data = await response.json();
return data.bitcoin.usd;
} catch (error) {
console.error('Error fetching Bitcoin price:', error);
throw error;
}
}

updateChart() {
const labels = this.priceHistory.map(item =>
new Date(item.timestamp).toLocaleTimeString()
);
const prices = this.priceHistory.map(item => item.price);

this.chart.data.labels = labels;
this.chart.data.datasets[0].data = prices;
this.chart.update();
}

updateStats() {
if (this.priceHistory.length > 0) {
const prices = this.priceHistory.map(item => item.price);
const lastPrice = prices[prices.length - 1];
const prevPrice = prices.length > 1 ? prices[prices.length - 2] : lastPrice;

// Update price and change
document.getElementById('price').textContent = `$${lastPrice.toLocaleString()}`;

// Calculate 24h stats
const highPrice = Math.max(...prices);
const lowPrice = Math.min(...prices);
const dayChange = ((lastPrice - prices[0]) / prices[0] * 100).toFixed(2);

// Update UI
document.getElementById('high-price').textContent = `$${highPrice.toLocaleString()}`;
document.getElementById('low-price').textContent = `$${lowPrice.toLocaleString()}`;
document.getElementById('day-change').textContent = `${dayChange}%`;

// Add color coding
document.getElementById('day-change').className = dayChange >= 0 ? 'price-up' : 'price-down';
}
}

setAlert() {
const input = document.getElementById('alertPrice');
const price = parseFloat(input.value);
if (!isNaN(price) && price > 0) {
this.alertPrice = price;
alert(`Alert set for $${price.toLocaleString()}`);
input.value = '';
}
}

checkAlert(price) {
if (this.alertPrice !== null) {
if ((this.alertPrice > price && this.priceHistory[this.priceHistory.length - 2]?.price < this.alertPrice) ||
(this.alertPrice < price && this.priceHistory[this.priceHistory.length - 2]?.price > this.alertPrice)) {
alert(`Bitcoin price has crossed $${this.alertPrice.toLocaleString()}!\nCurrent price: $${price.toLocaleString()}`);
this.alertPrice = null;
}
}
}

async startTracking() {
try {
const price = await this.fetchPrice();

this.priceHistory.push({
price,
timestamp: new Date().toISOString()
});

// Keep only last maxHistoryPoints
if (this.priceHistory.length > this.maxHistoryPoints) {
this.priceHistory.shift();
}

this.updateChart();
this.updateStats();
this.saveData();
this.checkAlert(price);

} catch (error) {
document.getElementById('price').textContent = 'Error fetching price';
}

// Update every 2 minutes
setTimeout(() => this.startTracking(), 120000);
}
}

// Initialize tracker
const tracker = new BitcoinPriceTracker();