diff --git a/cateditor/src/components/SelectionMixin.js b/cateditor/src/components/SelectionMixin.js
index dd6bf5c..7621bb6 100644
--- a/cateditor/src/components/SelectionMixin.js
+++ b/cateditor/src/components/SelectionMixin.js
@@ -1,72 +1,72 @@
 const SelectionMixin = { // eslint-disable-line no-unused-vars
   computed: {
     selectedSectionID: {
-      get () {
+      get() {
         return this.$store.getters.SELECTED_SECTION_ID
       },
-      set (value) {
+      set(value) {
         this.$store.dispatch('SET_SELECTED_SECTION_ID', value)
       }
     },
     selectedFamilyID: {
-      get () {
+      get() {
         return this.$store.getters.SELECTED_FAMILY_ID
       },
-      set (value) {
+      set(value) {
         this.$store.dispatch('SET_SELECTED_FAMILY_ID', value)
       }
     },
     selectedModelID: {
-      get () {
+      get() {
         return this.$store.getters.SELECTED_MODEL_ID
       },
-      set (value) {
+      set(value) {
         this.$store.dispatch('SET_SELECTED_MODEL_ID', value)
       }
     },
     selectedMaterial: {
-      get () {
+      get() {
         return this.$store.getters.SELECTED_MATERIAL_ID
       },
-      set (value) {
+      set(value) {
         this.$store.dispatch('SET_SELECTED_MATERIAL_ID', value)
       }
     },
   },
   methods: {
-    selectSection: function (id) {
+    selectSection: function(id) {
       this.selectedSectionID = id
       // this.selectedFamilyID = null
       // this.selectedModelID = null
       // this.selectedMaterial = null
     },
-    selectFamily: function (id) {
+    selectFamily: function(id) {
       this.selectedFamilyID = id
       // this.selectedModelID = null
       // this.selectedMaterial = null
     },
-    selectModel: function (id) {
+    selectModel: function(id) {
       this.selectedModelID = id
       // this.selectedFamilyID = null
       // this.selectedMaterial = null
     },
-    selectMaterial: function (id) {
+    selectMaterial: function(id) {
       this.selectedMaterial = id
     },
-    selectedFamilies: function () {
+    selectedFamilies: function() {
       let section = this.$store.getters.CAT_SECTION(this.selectedSectionID)
       let ids = this.sectionIDs(section)
       let materials = this.findMaterials(ids)
       return this.makeFamilies(materials)
     },
-    selectedFamily: function () {
+    selectedFamily: function() {
       let families = this.selectedFamilies()
       return families.find(s => s.id === this.selectedFamilyID)
     },
-    sectionIDs: function (section) {
+    sectionIDs: function(section) {
       let ids = []
 
-      if (section !== undefined) {
+      if (section) {
         for (let page of section.pages) {
           for (let block of page) {
             ids.push(...block.ids)
@@ -76,10 +76,10 @@ const SelectionMixin = { // eslint-disable-line no-unused-vars
 
       return ids
     },
-    findMaterials: function (ids) {
+    findMaterials: function(ids) {
       return ids.map(id => this.$store.getters.MATERIAL(id))
     },
-    makeFamilies: function (materials) {
+    makeFamilies: function(materials) {
       let families = []
 
       for (let mat of materials) {
@@ -102,7 +102,7 @@ const SelectionMixin = { // eslint-disable-line no-unused-vars
 
       return families
     },
-    uniquify: function (arr) {
+    uniquify: function(arr) {
       return [...new Set(arr)]
     },
   }