   <li>
            <a
              href="invoice.html"
              @click="selected = (selected === 'Invoice' ? '':'Invoice')"
              class="menu-item group"
              :class=" (selected === 'Invoice') && (page === 'invoice') ? 'menu-item-active' : 'menu-item-inactive'"
            >
              <svg
                :class="(selected === 'Invoice') && (page === 'invoice') ? 'menu-item-icon-active'  :'menu-item-icon-inactive'"
                width="24"
                height="24"
          