Show Current Price

ChatGPT Claude

Fetch the latest BTC/USDT price using a simple REST call and show it in a dashboard card.

Result

A simple dashboard card showing the real-time Bitcoin price fetched from our API.

Used Technologies

HTML/CSS/JS: For the UI and logic.
Fetch API: To make the HTTP request.
Bitcoin API: Specifically the getCurrentPrice endpoint.

Implementation Steps

1. The HTML Structure

Create a card structure with placeholders for the price and a refresh button.

<div class="price-card">
        <div class="price-card__header">
            <span class="price-card__label">Bitcoin Price (BTC/USDT)</span>
            <div id="status-dot" class="price-card__dot"></div>
        </div>
        <div class="price-card__body">
            <div id="loading-skeleton" class="price-card__loading">
                <div class="skeleton"></div>
            </div>
            <div id="error-message" class="price-card__error"></div>
            <div id="price-display" class="price-card__value" style="display: none;">
                <span class="price-card__currency">$</span>
                <span id="price-number" class="price-card__number">0.00</span>
            </div>
        </div>
        <div class="price-card__footer">
            <span class="price-card__source">Source: bitcoinapi.dev</span>
            <button id="refresh-btn" class="price-card__refresh">
                <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12a9 9 0 1 1-9-9c2.52 0 4.93 1 6.74 2.74L21 8"></path><path d="M21 3v5h-5"></path></svg>
            </button>
        </div>
    </div>

2. Styling the Card

Use CSS to create a modern, responsive card layout with loading animations.

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f8fafc;
}

.price-card {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.5rem;
    width: 100%;
    max-width: 320px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.price-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.price-card__label {
    font-size: 0.75rem;
    font-weight: 600;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.price-card__dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.price-card__dot.is-loading {
    background: #f59e0b;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.4; }
    100% { opacity: 1; }
}

.price-card__body {
    margin-bottom: 1rem;
}

.price-card__value {
    display: flex;
    align-items: baseline;
    color: #0f172a;
}

.price-card__currency {
    font-size: 1.5rem;
    font-weight: 500;
    margin-right: 0.25rem;
    color: #94a3b8;
}

.price-card__number {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.price-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #f1f5f9;
}

.price-card__source {
    font-size: 0.75rem;
    color: #94a3b8;
}

.price-card__refresh {
    background: transparent;
    border: none;
    color: #64748b;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    transition: all 0.2s;
}

.price-card__refresh:hover:not(:disabled) {
    background: #f1f5f9;
    color: #0f172a;
}

.price-card__refresh:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.skeleton {
    height: 3rem;
    background: #f1f5f9;
    border-radius: 8px;
    animation: skeleton-pulse 1.5s infinite;
}

@keyframes skeleton-pulse {
    0% { background-color: #f1f5f9; }
    50% { background-color: #e2e8f0; }
    100% { background-color: #f1f5f9; }
}

.price-card__error {
    color: #ef4444;
    font-size: 0.875rem;
    display: none;
}

3. Implementing the Logic

Use JavaScript to fetch the price from the API and update the DOM elements.

const BASE_URL = import.meta.env.VITE_API_BROWSER_URL || 'https://bitcoin-api.net/api';
const API_KEY = import.meta.env.VITE_BITCOIN_API_KEY;

const priceNumber = document.getElementById('price-number');
const priceDisplay = document.getElementById('price-display');
const loadingSkeleton = document.getElementById('loading-skeleton');
const errorMessage = document.getElementById('error-message');
const statusDot = document.getElementById('status-dot');
const refreshBtn = document.getElementById('refresh-btn');

async function fetchPrice() {
    try {
        // Show loading state
        loadingSkeleton.style.display = 'block';
        priceDisplay.style.display = 'none';
        errorMessage.style.display = 'none';
        statusDot.classList.add('is-loading');
        refreshBtn.disabled = true;

        const headers = {};
        if (API_KEY) {
            headers['Authorization'] = `Bearer ${API_KEY}`;
        }

        const response = await fetch(`${BASE_URL}/v1/prices/current?symbol=btcusdt`, { headers });
        const data = await response.json();

        if (!response.ok) {
            throw new Error(data.message || data.code || 'Failed to fetch price');
        }

        // Update UI
        priceNumber.textContent = parseFloat(data.price).toLocaleString(undefined, {
            minimumFractionDigits: 2,
            maximumFractionDigits: 2
        });

        loadingSkeleton.style.display = 'none';
        priceDisplay.style.display = 'flex';
    } catch (err) {
        console.error(err);
        errorMessage.textContent = err.message;
        loadingSkeleton.style.display = 'none';
        errorMessage.style.display = 'block';
    } finally {
        statusDot.classList.remove('is-loading');
        refreshBtn.disabled = false;
    }
}

refreshBtn.addEventListener('click', fetchPrice);

// Initial fetch
fetchPrice();

Resources

View on GitHub

Used Endpoints

GET /api/v1/prices/current — Get current price