kero/snippets/examples/dt/datatable/button/splitButton/widget.html

    <div class="u-button-group u-split">
        <button class="u-button u-split-pre">
            打印
        </button>
        <div class="u-button-group u-split-sub">
            <button class="u-button u-dropdown-toggle" id="split">
                <span class=" uf uf-anglearrowdown "></span>
            </button>
            <ul class="u-menu u-menu-bottom-right" for="split">
                <li class="u-menu-item"><a>报价单</a></li>
                <li class="u-menu-item"><a>到货单</a></li>
            </ul>
        </div>
    </div>