Crypto Price Tracker | HTML, CSS & JavaScript

Crypto Price Tracker with HTML, CSS & JavaScript

30 DAYS 30 PROJECT CHALLENGE

Day #24

Project Overview

A Crypto Price Tracker built using HTML, CSS, and JavaScript that allows users to view real-time cryptocurrency prices.
The application fetches live market data from a public crypto API and displays current prices in multiple currencies, helping users quickly track popular cryptocurrencies.

Key Features

Fetches real-time cryptocurrency prices.
Supports multiple popular cryptocurrencies.
Displays prices in USD and INR.
Uses a public API with no authentication required.
Instant updates without page reload.
Clean, responsive, and user-friendly interface.
Suitable for learning API integration and async data handling.

HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>Crypto Price Tracker</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>

  <div class="crypto-container">
    <h2>Crypto Price Tracker</h2>

    <select id="cryptoSelect">
      <option value="bitcoin">Bitcoin</option>
      <option value="ethereum">Ethereum</option>
      <option value="tether">Tether</option>
      <option value="binancecoin">Binance Coin</option>
      <option value="ripple">Ripple</option>
    </select>

    <button onclick="getPrice()">Get Price</button>

    <div class="result" id="result"></div>
  </div>

  <script src="script.js"></script>
</body>
</html>

CSS Code

* {
  box-sizing: border-box;
  font-family: "Segoe UI", sans-serif;
}

body {
  min-height: 100vh;
  background: #042453;
  display: flex;
  justify-content: center;
  align-items: center;
}

.crypto-container {
  background: #ffffff;
  width: 320px;
  padding: 25px;
  border-radius: 14px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.25);
}

h2 {
  margin-bottom: 15px;
}

select {
  width: 100%;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  margin-bottom: 10px;
}

button {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 6px;
  background: #4f46e5;
  color: white;
  cursor: pointer;
}

.result {
  margin-top: 15px;
  font-size: 14px;
  font-weight: 600;
}

.error {
  color: red;
}

Javascript Code

const result = document.getElementById("result");

function getPrice() {
  const crypto = document.getElementById("cryptoSelect").value;

  result.innerHTML = "Loading...";

  fetch(
    `https://api.coingecko.com/api/v3/simple/price?ids=${crypto}&vs_currencies=usd,inr`
  )
    .then(res => res.json())
    .then(data => {
      const usd = data[crypto].usd;
      const inr = data[crypto].inr;

      result.innerHTML = `
        💰 <strong>${crypto.toUpperCase()}</strong><br>
        USD: $${usd}<br>
        INR: ₹${inr}
      `;
    })
    .catch(() => {
      result.innerHTML = `<p class="error">Error fetching price</p>`;
    });
}