client.html

<!DOCTYPE html>

<html lang="en">

<head>
    <meta charset="utf-8">
    <title>Client!</title>
</head>

<body>

    <!-- div with messages -->
    <div id="messages"></div>
    <!-- message form -->
    <form name="publish">
        <input type="text" name="message">
        <input type="submit" style="display: none">
    </form>
    <script src="client.js"></script>

</body>
</html>