Convert to pure ES6 class

app/assets/javascripts/protected_tags/protected_tag_access_dropdown.js

-/* eslint-disable arrow-parens, no-param-reassign, object-shorthand, no-else-return, comma-dangle, max-len */
+export default class ProtectedTagAccessDropdown {
+  constructor(options) {
+    this.options = options;
+    this.initDropdown();
+  }
 
-(global => {
-  global.gl = global.gl || {};
-
-  gl.ProtectedTagAccessDropdown = class {
-    constructor(options) {
-      const { $dropdown, data, onSelect } = options;
-
-      $dropdown.glDropdown({
-        data: data,
-        selectable: true,
-        inputId: $dropdown.data('input-id'),
-        fieldName: $dropdown.data('field-name'),
-        toggleLabel(item, el) {
-          if (el.is('.is-active')) {
-            return item.text;
-          } else {
-            return 'Select';
-          }
-        },
-        clicked(item, $el, e) {
-          e.preventDefault();
-          onSelect();
+  initDropdown() {
+    const { onSelect } = this.options;
+    this.options.$dropdown.glDropdown({
+      data: this.options.data,
+      selectable: true,
+      inputId: this.options.$dropdown.data('input-id'),
+      fieldName: this.options.$dropdown.data('field-name'),
+      toggleLabel(item, el) {
+        if (el.is('.is-active')) {
+          return item.text;
         }
-      });
-    }
-  };
-})(window);
+        return 'Select';
+      },
+      clicked(item, $el, e) {
+        e.preventDefault();
+        onSelect();
+      },
+    });
+  }
+}

app/assets/javascripts/protected_tags/protected_tag_create.js

-/* eslint-disable no-new, arrow-parens, no-param-reassign, comma-dangle, max-len */
-/* global ProtectedTagDropdown */
-
-(global => {
-  global.gl = global.gl || {};
-
-  gl.ProtectedTagCreate = class {
-    constructor() {
-      this.$wrap = this.$form = $('.new_protected_tag');
-      this.buildDropdowns();
-    }
-
-    buildDropdowns() {
-      const $allowedToCreateDropdown = this.$wrap.find('.js-allowed-to-create');
-
-      // Cache callback
-      this.onSelectCallback = this.onSelect.bind(this);
-
-      // Allowed to Create dropdown
-      new gl.ProtectedTagAccessDropdown({
-        $dropdown: $allowedToCreateDropdown,
-        data: gon.create_access_levels,
-        onSelect: this.onSelectCallback
-      });
-
-      // Select default
-      $allowedToCreateDropdown.data('glDropdown').selectRowAtIndex(0);
-
-      // Protected tag dropdown
-      new ProtectedTagDropdown({
-        $dropdown: this.$wrap.find('.js-protected-tag-select'),
-        onSelect: this.onSelectCallback
-      });
-    }
-
-    // This will run after clicked callback
-    onSelect() {
-      // Enable submit button
-      const $tagInput = this.$wrap.find('input[name="protected_tag[name]"]');
-      const $allowedToCreateInput = this.$wrap.find('input[name="protected_tag[create_access_levels_attributes][0][access_level]"]');
-
-      this.$form.find('input[type="submit"]').attr('disabled', !($tagInput.val() && $allowedToCreateInput.length));
-    }
-  };
-})(window);
+import ProtectedTagAccessDropdown from './protected_tag_access_dropdown';
+import ProtectedTagDropdown from './protected_tag_dropdown';
+
+export default class ProtectedTagCreate {
+  constructor() {
+    this.$form = $('.new_protected_tag');
+    this.buildDropdowns();
+  }
+
+  buildDropdowns() {
+    const $allowedToCreateDropdown = this.$form.find('.js-allowed-to-create');
+
+    // Cache callback
+    this.onSelectCallback = this.onSelect.bind(this);
+
+    // Allowed to Create dropdown
+    this.protectedTagAccessDropdown = new ProtectedTagAccessDropdown({
+      $dropdown: $allowedToCreateDropdown,
+      data: gon.create_access_levels,
+      onSelect: this.onSelectCallback,
+    });
+
+    // Select default
+    $allowedToCreateDropdown.data('glDropdown').selectRowAtIndex(0);
+
+    // Protected tag dropdown
+    this.protectedTagDropdown = new ProtectedTagDropdown({
+      $dropdown: this.$form.find('.js-protected-tag-select'),
+      onSelect: this.onSelectCallback,
+    });
+  }
+
+  // This will run after clicked callback
+  onSelect() {
+    // Enable submit button
+    const $tagInput = this.$form.find('input[name="protected_tag[name]"]');
+    const $allowedToCreateInput = this.$form.find('input[name="protected_tag[create_access_levels_attributes][0][access_level]"]');
+
+    this.$form.find('input[type="submit"]').attr('disabled', !($tagInput.val() && $allowedToCreateInput.length));
+  }
+}

app/assets/javascripts/protected_tags/protected_tag_dropdown.js

-/* eslint-disable comma-dangle, no-unused-vars */
-
-class ProtectedTagDropdown {
+export default class ProtectedTagDropdown {
   constructor(options) {
     this.onSelect = options.onSelect;
     this.$dropdown = options.$dropdown;
@@ -21,7 +19,7 @@ class ProtectedTagDropdown {
       filterable: true,
       remote: false,
       search: {
-        fields: ['title']
+        fields: ['title'],
       },
       selectable: true,
       toggleLabel(selected) {
@@ -38,7 +36,7 @@ class ProtectedTagDropdown {
       clicked: (item, $el, e) => {
         e.preventDefault();
         this.onSelect();
-      }
+      },
     });
   }
 
@@ -63,7 +61,7 @@ class ProtectedTagDropdown {
     this.selectedTag = {
       title: tagName,
       id: tagName,
-      text: tagName
+      text: tagName,
     };
 
     if (tagName) {
@@ -75,5 +73,3 @@ class ProtectedTagDropdown {
     this.$dropdownFooter.toggleClass('hidden', !tagName);
   }
 }
-
-window.ProtectedTagDropdown = ProtectedTagDropdown;

app/assets/javascripts/protected_tags/protected_tag_edit.js

-/* eslint-disable no-new, arrow-parens, no-param-reassign, comma-dangle, max-len */
+/* eslint-disable no-new */
 /* global Flash */
 
-(global => {
-  global.gl = global.gl || {};
-
-  gl.ProtectedTagEdit = class {
-    constructor(options) {
-      this.$wrap = options.$wrap;
-      this.$allowedToCreateDropdown = this.$wrap.find('.js-allowed-to-create');
-
-      this.buildDropdowns();
-    }
-
-    buildDropdowns() {
-      // Allowed to create dropdown
-      new gl.ProtectedTagAccessDropdown({
-        $dropdown: this.$allowedToCreateDropdown,
-        data: gon.create_access_levels,
-        onSelect: this.onSelect.bind(this)
-      });
-    }
-
-    onSelect() {
-      const $allowedToCreateInput = this.$wrap.find(`input[name="${this.$allowedToCreateDropdown.data('fieldName')}"]`);
-
-      // Do not update if one dropdown has not selected any option
-      if (!$allowedToCreateInput.length) return;
-
-      this.$allowedToCreateDropdown.disable();
-
-      $.ajax({
-        type: 'POST',
-        url: this.$wrap.data('url'),
-        dataType: 'json',
-        data: {
-          _method: 'PATCH',
-          protected_tag: {
-            create_access_levels_attributes: [{
-              id: this.$allowedToCreateDropdown.data('access-level-id'),
-              access_level: $allowedToCreateInput.val()
-            }]
-          }
+import ProtectedTagAccessDropdown from './protected_tag_access_dropdown';
+
+export default class ProtectedTagEdit {
+  constructor(options) {
+    this.$wrap = options.$wrap;
+    this.$allowedToCreateDropdown = this.$wrap.find('.js-allowed-to-create');
+
+    this.buildDropdowns();
+  }
+
+  buildDropdowns() {
+    // Allowed to create dropdown
+    this.protectedTagAccessDropdown = new ProtectedTagAccessDropdown({
+      $dropdown: this.$allowedToCreateDropdown,
+      data: gon.create_access_levels,
+      onSelect: this.onSelect.bind(this),
+    });
+  }
+
+  onSelect() {
+    const $allowedToCreateInput = this.$wrap.find(`input[name="${this.$allowedToCreateDropdown.data('fieldName')}"]`);
+
+    // Do not update if one dropdown has not selected any option
+    if (!$allowedToCreateInput.length) return;
+
+    this.$allowedToCreateDropdown.disable();
+
+    $.ajax({
+      type: 'POST',
+      url: this.$wrap.data('url'),
+      dataType: 'json',
+      data: {
+        _method: 'PATCH',
+        protected_tag: {
+          create_access_levels_attributes: [{
+            id: this.$allowedToCreateDropdown.data('access-level-id'),
+            access_level: $allowedToCreateInput.val(),
+          }],
         },
-        error() {
-          $.scrollTo(0);
-          new Flash('Failed to update tag!');
-        }
-      }).always(() => {
-        this.$allowedToCreateDropdown.enable();
-      });
-    }
-  };
-})(window);
+      },
+      error() {
+        $.scrollTo(0);
+        new Flash('Failed to update tag!');
+      },
+    }).always(() => {
+      this.$allowedToCreateDropdown.enable();
+    });
+  }
+}

app/assets/javascripts/protected_tags/protected_tag_edit_list.js

-/* eslint-disable arrow-parens, no-param-reassign, no-new, comma-dangle */
+import ProtectedTagEdit from './protected_tag_edit';
 
-(global => {
-  global.gl = global.gl || {};
+export default class ProtectedTagEditList {
+  constructor() {
+    this.$wrap = $('.protected-tags-list');
+    this.protectedTagList = [];
+    this.initEditForm();
+  }
 
-  gl.ProtectedTagEditList = class {
-    constructor() {
-      this.$wrap = $('.protected-tags-list');
-
-      // Build edit forms
-      this.$wrap.find('.js-protected-tag-edit-form').each((i, el) => {
-        new gl.ProtectedTagEdit({
-          $wrap: $(el)
-        });
+  initEditForm() {
+    this.$wrap.find('.js-protected-tag-edit-form').each((i, el) => {
+      this.protectedTagList[i] = new ProtectedTagEdit({
+        $wrap: $(el),
       });
-    }
-  };
-})(window);
+    });
+  }
+}