index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Web Notification</title>
    <link rel="stylesheet" href="styles.css" />
    <link rel="shortcut icon" href="assets/icon.jpg" type="image/x-icon" />
  </head>
  <body>
    <main>
      <form action="">
        <section class="input-group">
          <input type="text" name="message" id="message" value="" />
          <label for="">Enter Message</label>
        </section>
        <section class="submit-btn">
          <input type="submit" value="Send" id="submit" />
        </section>
        <section class="error-container">
          <p class="error"></p>
        </section>
      </form>
    </main>

    <script src="script.js"></script>
  </body>
</html>