diff --git a/app/assets/javascripts/dispatcher.js.es6 b/app/assets/javascripts/dispatcher.js.es6
index 1ec950494ff..1e259a16f06 100644
--- a/app/assets/javascripts/dispatcher.js.es6
+++ b/app/assets/javascripts/dispatcher.js.es6
@@ -75,7 +75,7 @@
         case 'projects:issues:index':
           Issuable.init();
           new gl.IssuableBulkActions({
-            prefixId: page === 'projects:merge_requests:index' ?  'merge_request_' : 'issue_'
+            prefixId: page === 'projects:merge_requests:index' ? 'merge_request_' : 'issue_',
           });
           shortcut_handler = new ShortcutsNavigation();
           break;
diff --git a/app/assets/javascripts/issues_bulk_assignment.js.es6 b/app/assets/javascripts/issues_bulk_assignment.js.es6
index 1c8e5dede6f..52fd5d71b18 100644
--- a/app/assets/javascripts/issues_bulk_assignment.js.es6
+++ b/app/assets/javascripts/issues_bulk_assignment.js.es6
@@ -6,7 +6,7 @@
 
   class IssuableBulkActions {
     constructor({ container, form, issues, prefixId } = {}) {
-      this.prefixId = prefixId || 'issue_';
+      this.prefixId = prefixId || 'issue_';
       this.form = form || this.getElement('.bulk-update');
       this.$labelDropdown = this.form.find('.js-label-select');
       this.issues = issues || this.getElement('.issues-list .issue');
@@ -107,7 +107,7 @@
     }
 
     setOriginalDropdownData() {
-      let $labelSelect = $('.bulk-update .js-label-select');
+      const $labelSelect = $('.bulk-update .js-label-select');
       $labelSelect.data('common', this.getOriginalCommonIds());
       $labelSelect.data('marked', this.getOriginalMarkedIds());
       $labelSelect.data('indeterminate', this.getOriginalIndeterminateIds());
@@ -115,7 +115,7 @@
 
     // From issuable's initial bulk selection
     getOriginalCommonIds() {
-      let labelIds = [];
+      const labelIds = [];
 
       this.getElement('.selected_issue:checked').each((i, el) => {
         labelIds.push(this.getElement(`#${this.prefixId}${el.dataset.id}`).data('labels'));
@@ -125,17 +125,17 @@
 
     // From issuable's initial bulk selection
     getOriginalMarkedIds() {
-      var labelIds = [];
+      const labelIds = [];
       this.getElement('.selected_issue:checked').each((i, el) => {
         labelIds.push(this.getElement(`#${this.prefixId}${el.dataset.id}`).data('labels'));
       });
-      return _.intersection.apply(_, labelIds);
+      return _.intersection.apply(this, labelIds);
     }
 
     // From issuable's initial bulk selection
     getOriginalIndeterminateIds() {
-      let uniqueIds = [];
-      let labelIds = [];
+      const uniqueIds = [];
+      const labelIds = [];
       let issuableLabels = [];
 
       // Collect unique label IDs for all checked issues
diff --git a/app/assets/javascripts/labels_select.js b/app/assets/javascripts/labels_select.js
index 6853d6b9db2..ec2fc87bece 100644
--- a/app/assets/javascripts/labels_select.js
+++ b/app/assets/javascripts/labels_select.js
@@ -8,7 +8,7 @@
       var _this;
       _this = this;
       $('.js-label-select').each(function(i, dropdown) {
-        var $block, $colorPreview, $dropdown, $form, $loading, $selectbox, $sidebarCollapsedValue, $value, abilityName, defaultLabel, enableLabelCreateButton, issueURLSplit, issueUpdateURL, labelHTMLTemplate, labelNoneHTMLTemplate, labelUrl, namespacePath, projectPath, saveLabelData, selectedLabel, showAny, showNo, $sidebarLabelTooltip, initialSelected, $toggleText, fieldName, useId, propertyName, showMenuAbove, $container;
+        var $block, $colorPreview, $dropdown, $form, $loading, $selectbox, $sidebarCollapsedValue, $value, abilityName, defaultLabel, enableLabelCreateButton, issueURLSplit, issueUpdateURL, labelHTMLTemplate, labelNoneHTMLTemplate, labelUrl, namespacePath, projectPath, saveLabelData, selectedLabel, showAny, showNo, $sidebarLabelTooltip, initialSelected, $toggleText, fieldName, useId, propertyName, showMenuAbove, $container, $dropdownContainer;
         $dropdown = $(dropdown);
         $dropdownContainer = $dropdown.closest('.labels-filter');
         $toggleText = $dropdown.find('.dropdown-toggle-text');
diff --git a/app/assets/javascripts/render_math.js b/app/assets/javascripts/render_math.js
index a8a56430f88..209e7a8661d 100644
--- a/app/assets/javascripts/render_math.js
+++ b/app/assets/javascripts/render_math.js
@@ -1,4 +1,4 @@
-/* eslint-disable func-names, space-before-function-paren, consistent-return, no-var, no-undef, no-else-return, prefer-arrow-callback, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, consistent-return, no-var, no-undef, no-else-return, prefer-arrow-callback, padded-blocks, max-len, no-console */
 // Renders math using KaTeX in any element with the
 // `js-render-math` class
 //