const Selector = {
    DATA_SPY        : '[data-spy="scroll"]',
    ACTIVE          : '.active',
    NAV_LIST_GROUP  : '.nav, .list-group',
    NAV_LINKS       : '.nav-link',
    LIST_ITEMS      : '.list-group-item',
    DROPDOWN        : '.dropdown',
    DROPDOWN_ITEMS  : '.dropdown-item',
    DROPDOWN_TOGGLE : '.dropdown-toggle'
}