diff --git a/app/assets/javascripts/header.js b/app/assets/javascripts/header.js
index ea2e2205077..33a352e158a 100644
--- a/app/assets/javascripts/header.js
+++ b/app/assets/javascripts/header.js
@@ -7,10 +7,12 @@ import { highCountTrim } from '~/lib/utils/text_utility';
  * @param {jQuery.Event} e
  * @param {String} count
  */
-$(document).on('todo:toggle', (e, count) => {
-  const parsedCount = parseInt(count, 10);
-  const $todoPendingCount = $('.todos-count');
+export default function initTodoToggle() {
+  $(document).on('todo:toggle', (e, count) => {
+    const parsedCount = parseInt(count, 10);
+    const $todoPendingCount = $('.todos-count');
 
-  $todoPendingCount.text(highCountTrim(parsedCount));
-  $todoPendingCount.toggleClass('hidden', parsedCount === 0);
-});
+    $todoPendingCount.text(highCountTrim(parsedCount));
+    $todoPendingCount.toggleClass('hidden', parsedCount === 0);
+  });
+}
diff --git a/app/assets/javascripts/init_legacy_filters.js b/app/assets/javascripts/init_legacy_filters.js
index 1211c2c802c..fcf424408f2 100644
--- a/app/assets/javascripts/init_legacy_filters.js
+++ b/app/assets/javascripts/init_legacy_filters.js
@@ -1,15 +1,15 @@
 /* eslint-disable no-new */
 /* global LabelsSelect */
 /* global MilestoneSelect */
-/* global IssueStatusSelect */
 /* global SubscriptionSelect */
 
 import UsersSelect from './users_select';
+import issueStatusSelect from './issue_status_select';
 
 export default () => {
   new UsersSelect();
   new LabelsSelect();
   new MilestoneSelect();
-  new IssueStatusSelect();
+  issueStatusSelect();
   new SubscriptionSelect();
 };
diff --git a/app/assets/javascripts/issuable_bulk_update_sidebar.js b/app/assets/javascripts/issuable_bulk_update_sidebar.js
index bb509089b1d..4a15ec8b147 100644
--- a/app/assets/javascripts/issuable_bulk_update_sidebar.js
+++ b/app/assets/javascripts/issuable_bulk_update_sidebar.js
@@ -1,12 +1,11 @@
 /* eslint-disable class-methods-use-this, no-new */
 /* global LabelsSelect */
 /* global MilestoneSelect */
-/* global IssueStatusSelect */
 /* global SubscriptionSelect */
 
 import IssuableBulkUpdateActions from './issuable_bulk_update_actions';
 import './milestone_select';
-import './issue_status_select';
+import issueStatusSelect from './issue_status_select';
 import './subscription_select';
 import './labels_select';
 
@@ -49,7 +48,7 @@ export default class IssuableBulkUpdateSidebar {
   initDropdowns() {
     new LabelsSelect();
     new MilestoneSelect();
-    new IssueStatusSelect();
+    issueStatusSelect();
     new SubscriptionSelect();
   }
 
diff --git a/app/assets/javascripts/issue.js b/app/assets/javascripts/issue.js
index 3fc29f9a661..acd5730cf3c 100644
--- a/app/assets/javascripts/issue.js
+++ b/app/assets/javascripts/issue.js
@@ -6,7 +6,7 @@ import TaskList from './task_list';
 import CreateMergeRequestDropdown from './create_merge_request_dropdown';
 import IssuablesHelper from './helpers/issuables_helper';
 
-class Issue {
+export default class Issue {
   constructor() {
     if ($('a.btn-close').length) {
       this.taskList = new TaskList({
@@ -147,5 +147,3 @@ class Issue {
     });
   }
 }
-
-export default Issue;
diff --git a/app/assets/javascripts/issue_status_select.js b/app/assets/javascripts/issue_status_select.js
index 56cb536dcde..03546f61d1f 100644
--- a/app/assets/javascripts/issue_status_select.js
+++ b/app/assets/javascripts/issue_status_select.js
@@ -1,34 +1,23 @@
-/* eslint-disable func-names, space-before-function-paren, wrap-iife, no-var, quotes, object-shorthand, no-unused-vars, no-shadow, one-var, one-var-declaration-per-line, comma-dangle, max-len */
-(function() {
-  this.IssueStatusSelect = (function() {
-    function IssueStatusSelect() {
-      $('.js-issue-status').each(function(i, el) {
-        var fieldName;
-        fieldName = $(el).data("field-name");
-        return $(el).glDropdown({
-          selectable: true,
-          fieldName: fieldName,
-          toggleLabel: (function(_this) {
-            return function(selected, el, instance) {
-              var $item, label;
-              label = 'Author';
-              $item = instance.dropdown.find('.is-active');
-              if ($item.length) {
-                label = $item.text();
-              }
-              return label;
-            };
-          })(this),
-          clicked: function(options) {
-            return options.e.preventDefault();
-          },
-          id: function(obj, el) {
-            return $(el).data("id");
-          }
-        });
-      });
-    }
-
-    return IssueStatusSelect;
-  })();
-}).call(window);
+export default function issueStatusSelect() {
+  $('.js-issue-status').each((i, el) => {
+    const fieldName = $(el).data('field-name');
+    return $(el).glDropdown({
+      selectable: true,
+      fieldName,
+      toggleLabel(selected, element, instance) {
+        let label = 'Author';
+        const $item = instance.dropdown.find('.is-active');
+        if ($item.length) {
+          label = $item.text();
+        }
+        return label;
+      },
+      clicked(options) {
+        return options.e.preventDefault();
+      },
+      id(obj, element) {
+        return $(element).data('id');
+      },
+    });
+  });
+}
diff --git a/app/assets/javascripts/main.js b/app/assets/javascripts/main.js
index fd9d0c335a5..d743f20c615 100644
--- a/app/assets/javascripts/main.js
+++ b/app/assets/javascripts/main.js
@@ -54,11 +54,8 @@ import './gl_dropdown';
 import './gl_field_error';
 import './gl_field_errors';
 import './gl_form';
-import './header';
+import initTodoToggle from './header';
 import initImporterStatus from './importer_status';
-import './issuable_form';
-import './issue';
-import './issue_status_select';
 import './labels_select';
 import './layout_nav';
 import LazyLoader from './lazy_loader';
@@ -137,6 +134,7 @@ $(function () {
 
   initBreadcrumbs();
   initImporterStatus();
+  initTodoToggle();
 
   // Set the default path for all cookies to GitLab's root directory
   Cookies.defaults.path = gon.relative_url_root || '/';
diff --git a/spec/javascripts/header_spec.js b/spec/javascripts/header_spec.js
index 4751eb868a4..2443ffd48f3 100644
--- a/spec/javascripts/header_spec.js
+++ b/spec/javascripts/header_spec.js
@@ -1,4 +1,4 @@
-import '~/header';
+import initTodoToggle from '~/header';
 
 describe('Header', function () {
   const todosPendingCount = '.todos-count';
@@ -14,6 +14,7 @@ describe('Header', function () {
 
   preloadFixtures(fixtureTemplate);
   beforeEach(() => {
+    initTodoToggle();
     loadFixtures(fixtureTemplate);
   });