<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Document</title>
<script src="/socket.io/socket.io.js"></script>
<script defer src="script.js"></script>
</head>
<body>
<input id="input" type="text" />
<button id="send">Send</button>
<div id="chat"></div>
</body>
</html>