Hi Mohammad,   You can try to use like this: type   TXPopupMenu = class(TUniPopupMenu)   end; procedure TMainForm.UniFormReady(Sender: TObject); begin   with TXPopupMenu(UniPopupMenu1).MenuControl.JSInterface do   begin     JSConfig('cls', ['test']);     JSConfig('bodyCls', ['test1']);     JSConfig('disabledCls', ['test2']);     JSConfig('headerOverCls', ['test3']);     JSConfig('iconCls', ['test4']);     JSConfig('overCls', ['test5']);   end; end; Best regards.
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