<form method="post">

  <div>
    <label for="article_id">Article ID</label>
    <input name="article_id" pattern="^[a-z0-9-]+$"></input>
  </div>

  <div>
    <label for=content">Content</label>
    <textarea name="content"></textarea>
  </div>

  <div>
    <button class="submit-form-preview">Preview</button>
  </div>

  <div>
    <button type="submit" class="submit-form">Create</button>
  </div>

</form>