Hello, World!

<p>Hello, World!</p>function createWhatsAppButton(phoneNumber, message) {
    const waButton = document.createElement("a");
    waButton.href = `https://wa.me/${phoneNumber}?text=${encodeURIComponent(message)}`;
    waButton.target = "_blank";
    waButton.innerHTML = "Chat via WhatsApp";
    waButton.style = "display: inline-block; padding: 10px 20px; background-color: #25D366; color: white; text-decoration: none; font-size: 16px; border-radius: 5px; font-weight: bold;";
    
    document.body.appendChild(waButton);
}

// Gunakan fungsi ini dengan nomor WhatsApp dan pesan default
createWhatsAppButton("085904429261", "Halo, saya tertarik dengan layanan Blue Marine Dive!");