create_topic.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>掲示板 - トピック作成</title>
  <link rel="stylesheet" href="css/mvp.css">
</head>
<body>
  <h1>新しいトピックを作成</h1>
  <a href="index.html" class="button">トピック一覧に戻る</a>

    <label for="topic-name">トピック名:</label>
    <input type="text" id="topic-name" name="topic-name" required>
    <br>
  <label for="topic-description">説明:</label>
    <textarea id="topic-description" name="topic-description"></textarea>
    <br>
    <label for="topic-creator">作成者</label>
    <input id="topic-creator" name="topic-creator"></input>

    <button type="submit">作成</button>
  </form>

  <script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-app.js"></script>
  <script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-auth.js"></script>
  <script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-database.js"></script>
  <script src="js/app.js"></script>
</body>
</html>