websocket di node.js untuk membangun aplikasi chat real-time sederhana

<div class="chat-container">

<div class="chat-header"> WebSocket Chat</div>

<ul class="chat-messages" id="chatBox"></ul>

<div class="chat-input">

<input type="text" id="msgInput" placeholder="Ketik pesan..." />

<button onclick="sendMessage()">Kirim</button>

</div>

</div>

<script>

const socket = new WebSocket("ws://localhost:3000");

socket.onmessage = (event) => {