md-strikethrough class="btn btn-sm">strikethrough</md-strikethrough>
      </markdown-toolbar>
      <textarea rows="6" class="mt-3 d-block width-full" id="textarea"></textarea>
    </div>

    <details class="container py-4">
      <summary>Initially hidden toolbar!</summary>
      <div class="container py-4">
        <p><button type="button">Add a Comment</button></p>
        <markdown-toolbar for="textarea2">
          <md-bold class="btn btn-sm">bold</md-bold>
          <md-header class="btn btn-sm">hea