onGroup DropdownDirection="DropdownDirection.Right" IsOpen="@IsOpen15">
    <BSButton Color="Color.Secondary">Split Dropright</BSButton>
    <BSDropdownToggle IsSplit="true" Color="Color.Secondary" @onclick="onclick15"/>
    <BSDropdownMenu @bind-IsOpen="@IsOpen15">
        <BSDropdownItem Href="javascript:void(0);">Action</BSDropdownItem>
        <BSDropdownItem Href="javascript:void(0);">Another Action</BSDropdownItem>
        <BSDropdownItem IsDivider="true" />
        <BSDropdownItem Href="javascript:vo