Need to customize style in <ejs-dropdownlist

Question

my dropdowlnlist, 

<ejs-dropdownlist id="dropdownBankFilters" ejs-for="@Model.ManagerViewModel.ManagerList.SelectedValue"
 dataSource="@Model.ManagerViewModel.ManagerList.Items" popupHeight="300px"
 placeholder="Select Manager Name" allowFiltering="true">
 <e-dropdownlist-fields text="Text" value="Value" iconCss="Text" id="Text"></e-dropdownlist-fields>
 </ejs-dropdownlist>

need to change old to new