Refactor code (#195)

src/store/getters.js

@@ -3,14 +3,16 @@ export default {
   // current list type and current pagination
   activeIds (state) {
     const { activeType, itemsPerPage, lists } = state
-    const page = Number(state.route.params.page) || 1
-    if (activeType) {
-      const start = (page - 1) * itemsPerPage
-      const end = page * itemsPerPage
-      return lists[activeType].slice(start, end)
-    } else {
+
+    if (!activeType) {
       return []
     }
+
+    const page = Number(state.route.params.page) || 1
+    const start = (page - 1) * itemsPerPage
+    const end = page * itemsPerPage
+
+    return lists[activeType].slice(start, end)
   },
 
   // items that should be currently displayed.