Dropdown: reuse variable (twbs#39046)

Co-authored-by: XhmikosR <[email protected]>

Author: 2 people

js/src/tab.js

@@ -40,7 +40,7 @@ const CLASS_DROPDOWN = 'dropdown'
 
 const SELECTOR_DROPDOWN_TOGGLE = '.dropdown-toggle'
 const SELECTOR_DROPDOWN_MENU = '.dropdown-menu'
-const NOT_SELECTOR_DROPDOWN_TOGGLE = ':not(.dropdown-toggle)'
+const NOT_SELECTOR_DROPDOWN_TOGGLE = `:not(${SELECTOR_DROPDOWN_TOGGLE})`
 
 const SELECTOR_TAB_PANEL = '.list-group, .nav, [role="tablist"]'
 const SELECTOR_OUTER = '.nav-item, .list-group-item'