Get Combo of two classes at same tag by Css.
<div class=" treeview-menu menu-open " > User Menu </div> Issue: To get the combination of two classes " treeview-menu " and " menu-open " , we have to call like this: Solution: div .treeview-menu.menu-open{ background-color:#f00; color:#000 } Notice: There is no single space between both classes.