<section>
  <block-controls>
    <toolbar-group>
      <toolbar-button data-bind="darkMode" icon="styles"></toolbar-button>
      <toolbar-button
        data-bind="postMeta.bold"
        icon="formatBold"
      ></toolbar-button>
    </toolbar-group>

    <toolbar-group>
      <toolbar-dropdown-menu
        icon="more"
        label="Select a direction"
        data-bind="direction"
      >
        <toolbar-dropdown-menu-option icon="arrowUp" value="up"
          >Up</toolbar-dropdown-menu-option
        >