<div class="example">
  <div id="toolbar" class="container">
    <div>
      <div>
        <select id="sheet-select">
          <option value="" disabled selected>SheetName</option>
        </select>
        <select id="action-select">
          <option value="" disabled selected>Select action</option>
          <option value="add-sheet">Add sheet</option>
          <option value="remove-sheet">Remove sheet</option>
          <option value="add-rows">Add row(s)</option>
          <option value="add-columns"