Defines if tabs can be reordered. The .reorder is a boolean and defines if tab can be dragged to reorder You can defined it during object creation: let tabs = new w2tabs({ name: 'tabs', reorder: true, tabs: [ { id: 'tab1', text: 'Tab 1' }, { id: 'tab2', text: 'Tab 2' }, { id: 'tab3', text: 'Tab 3' }, { id: 'tab4', text: 'Tab 4' } ] }); Or any time during run-time: w2ui.tabs.reorder = true; w2ui.tabs.refresh();