HackMD/public/js/lib/editor/toolbar.html

<div class="toolbar">
  <div class="btn-toolbar" role="toolbar" aria-label="Editor toolbar">
    <div class="btn-group" role="group">
      <a id="makeBold" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Bold">
          <i class="fa fa-bold fa-fw"></i>
      </a>
      <a id="makeItalic" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Italic">
          <i class="fa fa-italic fa-fw"></i>
      </a>
      <a id="makeStrike" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Strikethrough">
          <i class="fa fa-strikethrough fa-fw"></i>
      </a>
      <a id="makeHeader" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Heading">
          <i class="fa fa-h1 fa-fw">H</i>
      </a>
      <a id="makeCode" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Code">
          <i class="fa fa-code fa-fw"></i>
      </a>
      <a id="makeQuote" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Quote">
          <i class="fa fa-quote-right fa-fw"></i>
      </a>
      <a id="makeGenericList" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="List">
          <i class="fa fa-list fa-fw"></i>
      </a>
      <a id="makeOrderedList" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Numbered List">
          <i class="fa fa-list-ol fa-fw"></i>
      </a>
      <a id="makeCheckList" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Check List">
          <i class="fa fa-check-square fa-fw"></i>
      </a>
      <a id="makeLink" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Link">
          <i class="fa fa-link fa-fw"></i>
      </a>
      <a id="makeImage" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Image">
          <i class="fa fa-image fa-fw"></i>
      </a>
      <a id="makeTable" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Table">
          <i class="fa fa-table fa-fw"></i>
      </a>
      <a id="makeLine" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Line">
          <i class="fa fa-minus fa-fw"></i>
      </a>
      <a id="makeComment" class="btn btn-sm btn-dark text-uppercase" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" title="Comment">
          <i class="fa fa-comment fa-fw"></i>
      </a>
    </div>
  </div>
</div>