On touch-enabled devices, opening a dropdown adds empty, "btn btn-danger dropdown-toggle dropdown-toggle-split", , "btn btn-secondary btn-lg dropdown-toggle", "btn btn-lg btn-secondary dropdown-toggle dropdown-toggle-split", "btn btn-secondary btn-sm dropdown-toggle", "btn btn-sm btn-secondary dropdown-toggle dropdown-toggle-split", "navbar navbar-expand-lg navbar-dark bg-dark", "btn btn-secondary dropdown-toggle dropdown-toggle-split", "dropdown-menu dropdown-menu-end dropdown-menu-lg-start". 917. Via data attributes or JavaScript, the dropdown plugin toggles hidden content (dropdown menus) by toggling the .show class on the parent list item. you can choose multiple select in select box. attribute: data-filter-starts-with-search. Theyre toggled by clicking, not by hovering; this is an intentional design decision. To disable that feature, you can set smartDisplay to false. It allows results to be filtered based on the values of columns. Heres how you can put them to work with either