require jQuery to be explicitly imported

app/assets/javascripts/contextual_sidebar.js

+import $ from 'jquery';
 import Cookies from 'js-cookie';
 import _ from 'underscore';
 import bp from './breakpoints';

app/assets/javascripts/create_label.js

 /* eslint-disable func-names, prefer-arrow-callback */
+
+import $ from 'jquery';
 import Api from './api';
 import { humanize } from './lib/utils/text_utility';

app/assets/javascripts/cycle_analytics/cycle_analytics_bundle.js

+import $ from 'jquery';
 import Vue from 'vue';
 import Cookies from 'js-cookie';
 import Flash from '../flash';

app/assets/javascripts/diff.js

+import $ from 'jquery';
 import axios from '~/lib/utils/axios_utils';
 import flash from '~/flash';
 import { __ } from '~/locale';

app/assets/javascripts/diff_notes/components/comment_resolve_btn.js

 /* eslint-disable comma-dangle, object-shorthand, func-names, no-else-return, quotes, no-lonely-if, max-len */
 /* global CommentsStore */
+import $ from 'jquery';
 import Vue from 'vue';
 const CommentAndResolveBtn = Vue.extend({

app/assets/javascripts/diff_notes/components/diff_note_avatars.js

 /* global CommentsStore */
+import $ from 'jquery';
 import Vue from 'vue';
 import collapseIcon from '../icons/collapse_icon.svg';
 import Notes from '../../notes';

app/assets/javascripts/diff_notes/components/jump_to_discussion.js

@@ -2,6 +2,7 @@
 /* global DiscussionMixins */
 /* global CommentsStore */
+import $ from 'jquery';
 import Vue from 'vue';
 import '../mixins/discussion';

app/assets/javascripts/diff_notes/components/resolve_btn.js

@@ -2,6 +2,7 @@
 /* global CommentsStore */
 /* global ResolveService */
+import $ from 'jquery';
 import Vue from 'vue';
 import Flash from '../../flash';

app/assets/javascripts/diff_notes/diff_notes_bundle.js

 /* eslint-disable func-names, comma-dangle, new-cap, no-new, max-len */
 /* global ResolveCount */
+import $ from 'jquery';
 import Vue from 'vue';
 import './models/discussion';
 import './models/note';

app/assets/javascripts/diff_notes/models/discussion.js

 /* eslint-disable space-before-function-paren, camelcase, guard-for-in, no-restricted-syntax, no-unused-vars, max-len */
 /* global NoteModel */
+import $ from 'jquery';
 import Vue from 'vue';
 import { localTimeAgo } from '../../lib/utils/datetime_utility';

app/assets/javascripts/dispatcher.js

 /* eslint-disable func-names, space-before-function-paren, no-var, prefer-arrow-callback, wrap-iife, no-shadow, consistent-return, one-var, one-var-declaration-per-line, camelcase, default-case, no-new, quotes, no-duplicate-case, no-case-declarations, no-fallthrough, max-len */
+
+import $ from 'jquery';
 import Flash from './flash';
 import GfmAutoComplete from './gfm_auto_complete';
 import { convertPermissionToBoolean } from './lib/utils/common_utils';

app/assets/javascripts/dropzone_input.js

+import $ from 'jquery';
 import Dropzone from 'dropzone';
 import _ from 'underscore';
 import './preview_markdown';

app/assets/javascripts/due_date_select.js

 /* global dateFormat */
+import $ from 'jquery';
 import Pikaday from 'pikaday';
 import axios from './lib/utils/axios_utils';
 import { parsePikadayDate, pikadayToString } from './lib/utils/datefix';

app/assets/javascripts/environments/components/environment_stop.vue

@@ -3,6 +3,8 @@
   * Renders the stop "button" that allows stop an environment.
   * Used in environments table.
   */
+
+  import $ from 'jquery';
   import eventHub from '../event_hub';
   import loadingIcon from '../../vue_shared/components/loading_icon.vue';
   import tooltip from '../../vue_shared/directives/tooltip';

app/assets/javascripts/experimental_flags.js

+import $ from 'jquery';
 import Cookies from 'js-cookie';
 export default () => {

app/assets/javascripts/feature_highlight/feature_highlight.js

+import $ from 'jquery';
 import _ from 'underscore';
 import {
   getSelector,

app/assets/javascripts/feature_highlight/feature_highlight_helper.js

+import $ from 'jquery';
 import axios from '../lib/utils/axios_utils';
 import { __ } from '../locale';
 import Flash from '../flash';

app/assets/javascripts/filterable_list.js

+import $ from 'jquery';
 import _ from 'underscore';
 import axios from './lib/utils/axios_utils';

app/assets/javascripts/gfm_auto_complete.js

+import $ from 'jquery';
 import _ from 'underscore';
 import glRegexp from './lib/utils/regexp';
 import AjaxCache from './lib/utils/ajax_cache';

app/assets/javascripts/gl_dropdown.js

 /* eslint-disable func-names, no-underscore-dangle, space-before-function-paren, no-var, one-var, one-var-declaration-per-line, prefer-rest-params, max-len, vars-on-top, wrap-iife, no-unused-vars, quotes, no-shadow, no-cond-assign, prefer-arrow-callback, no-return-assign, no-else-return, camelcase, comma-dangle, no-lonely-if, guard-for-in, no-restricted-syntax, consistent-return, prefer-template, no-param-reassign, no-loop-func, no-mixed-operators */
 /* global fuzzaldrinPlus */
+
+import $ from 'jquery';
 import _ from 'underscore';
 import fuzzaldrinPlus from 'fuzzaldrin-plus';
 import axios from './lib/utils/axios_utils';
@@ -576,7 +578,7 @@ GitLabDropdown = (function() {
       for (var i = 0; i < html.length; i += 1) {
         var el = html[i];
-        if (el instanceof jQuery) {
+        if (el instanceof $) {
           el = el.get(0);
         }