Merge branch 'remove-needless-bind-polyfills' into 'master'

Remove needless bind and indexOf polyfills

See merge request !11187

23 files changed, 73 insertions, 115 deletions

diff --git a/app/assets/javascripts/files_comment_button.js b/app/assets/javascripts/files_comment_button.js
index 59d6508fc02..534e651b030 100644
--- a/app/assets/javascripts/files_comment_button.js
+++ b/app/assets/javascripts/files_comment_button.js
@@ -3,7 +3,6 @@
 /* global notes */
 
 let $commentButtonTemplate;
-var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
 
 window.FilesCommentButton = (function() {
   var COMMENT_BUTTON_CLASS, EMPTY_CELL_CLASS, LINE_COLUMN_CLASSES, LINE_CONTENT_CLASS, LINE_HOLDER_CLASS, LINE_NUMBER_CLASS, OLD_LINE_CLASS, TEXT_FILE_SELECTOR, UNFOLDABLE_LINE_CLASS;
@@ -27,8 +26,8 @@ window.FilesCommentButton = (function() {
   TEXT_FILE_SELECTOR = '.text-file';
 
   function FilesCommentButton(filesContainerElement) {
-    this.render = bind(this.render, this);
-    this.hideButton = bind(this.hideButton, this);
+    this.render = this.render.bind(this);
+    this.hideButton = this.hideButton.bind(this);
     this.isParallelView = notes.isParallelView();
     filesContainerElement.on('mouseover', LINE_COLUMN_CLASSES, this.render)
       .on('mouseleave', LINE_COLUMN_CLASSES, this.hideButton);
diff --git a/app/assets/javascripts/gl_dropdown.js b/app/assets/javascripts/gl_dropdown.js
index 0c9eb84f0eb..2eee989bffe 100644
--- a/app/assets/javascripts/gl_dropdown.js
+++ b/app/assets/javascripts/gl_dropdown.js
@@ -1,9 +1,7 @@
 /* eslint-disable func-names, 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 */
 
-var GitLabDropdown, GitLabDropdownFilter, GitLabDropdownRemote,
-  bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; },
-  indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i += 1) { if (i in this && this[i] === item) return i; } return -1; };
+var GitLabDropdown, GitLabDropdownFilter, GitLabDropdownRemote;
 
 GitLabDropdownFilter = (function() {
   var ARROW_KEY_CODES, BLUR_KEYCODES, HAS_VALUE_CLASS;
@@ -213,10 +211,10 @@ GitLabDropdown = (function() {
     var searchFields, selector, self;
     this.el = el1;
     this.options = options;
-    this.updateLabel = bind(this.updateLabel, this);
-    this.hidden = bind(this.hidden, this);
-    this.opened = bind(this.opened, this);
-    this.shouldPropagate = bind(this.shouldPropagate, this);
+    this.updateLabel = this.updateLabel.bind(this);
+    this.hidden = this.hidden.bind(this);
+    this.opened = this.opened.bind(this);
+    this.shouldPropagate = this.shouldPropagate.bind(this);
     self = this;
     selector = $(this.el).data("target");
     this.dropdown = selector != null ? $(selector) : $(this.el).parent();
@@ -627,8 +625,8 @@ GitLabDropdown = (function() {
   };
 
   GitLabDropdown.prototype.highlightTextMatches = function(text, term) {
-    var occurrences;
-    occurrences = fuzzaldrinPlus.match(text, term);
+    const occurrences = fuzzaldrinPlus.match(text, term);
+    const indexOf = [].indexOf;
     return text.split('').map(function(character, i) {
       if (indexOf.call(occurrences, i) !== -1) {
         return "<b>" + character + "</b>";
diff --git a/app/assets/javascripts/graphs/stat_graph_contributors_graph.js b/app/assets/javascripts/graphs/stat_graph_contributors_graph.js
index 521bc77db66..0deb27e522b 100644
--- a/app/assets/javascripts/graphs/stat_graph_contributors_graph.js
+++ b/app/assets/javascripts/graphs/stat_graph_contributors_graph.js
@@ -2,7 +2,6 @@
 
 import d3 from 'd3';
 
-const bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
 const extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };
 const hasProp = {}.hasOwnProperty;
 
@@ -95,7 +94,7 @@ export const ContributorsMasterGraph = (function(superClass) {
 
   function ContributorsMasterGraph(data1) {
     this.data = data1;
-    this.update_content = bind(this.update_content, this);
+    this.update_content = this.update_content.bind(this);
     this.width = $('.content').width() - 70;
     this.height = 200;
     this.x = null;
diff --git a/app/assets/javascripts/issuable_form.js b/app/assets/javascripts/issuable_form.js
index 687c2bb6110..544fc91876a 100644
--- a/app/assets/javascripts/issuable_form.js
+++ b/app/assets/javascripts/issuable_form.js
@@ -7,8 +7,6 @@
 /* global Pikaday */
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.IssuableForm = (function() {
     IssuableForm.prototype.issueMoveConfirmMsg = 'Are you sure you want to move this issue to another project?';
 
@@ -17,10 +15,10 @@
     function IssuableForm(form) {
       var $issuableDueDate, calendar;
       this.form = form;
-      this.toggleWip = bind(this.toggleWip, this);
-      this.renderWipExplanation = bind(this.renderWipExplanation, this);
-      this.resetAutosave = bind(this.resetAutosave, this);
-      this.handleSubmit = bind(this.handleSubmit, this);
+      this.toggleWip = this.toggleWip.bind(this);
+      this.renderWipExplanation = this.renderWipExplanation.bind(this);
+      this.resetAutosave = this.resetAutosave.bind(this);
+      this.handleSubmit = this.handleSubmit.bind(this);
       gl.GfmAutoComplete.setup();
       new UsersSelect();
       new ZenMode();
diff --git a/app/assets/javascripts/labels.js b/app/assets/javascripts/labels.js
index 17a3fc1b1e4..03dd61b4263 100644
--- a/app/assets/javascripts/labels.js
+++ b/app/assets/javascripts/labels.js
@@ -1,11 +1,9 @@
 /* eslint-disable func-names, space-before-function-paren, no-var, prefer-rest-params, wrap-iife, vars-on-top, no-unused-vars, max-len */
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.Labels = (function() {
     function Labels() {
-      this.setSuggestedColor = bind(this.setSuggestedColor, this);
-      this.updateColorPreview = bind(this.updateColorPreview, this);
+      this.setSuggestedColor = this.setSuggestedColor.bind(this);
+      this.updateColorPreview = this.updateColorPreview.bind(this);
       var form;
       form = $('.label-form');
       this.cleanBinding();
diff --git a/app/assets/javascripts/line_highlighter.js b/app/assets/javascripts/line_highlighter.js
index 3ac6dedf131..517f03d5aba 100644
--- a/app/assets/javascripts/line_highlighter.js
+++ b/app/assets/javascripts/line_highlighter.js
@@ -31,8 +31,6 @@ require('vendor/jquery.scrollTo');
 //   </div>
 //
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.LineHighlighter = (function() {
     // CSS class applied to highlighted lines
     LineHighlighter.prototype.highlightClass = 'hll';
@@ -47,9 +45,9 @@ require('vendor/jquery.scrollTo');
         // hash - String URL hash for dependency injection in tests
         hash = location.hash;
       }
-      this.setHash = bind(this.setHash, this);
-      this.highlightLine = bind(this.highlightLine, this);
-      this.clickHandler = bind(this.clickHandler, this);
+      this.setHash = this.setHash.bind(this);
+      this.highlightLine = this.highlightLine.bind(this);
+      this.clickHandler = this.clickHandler.bind(this);
       this.highlightHash = this.highlightHash.bind(this);
       this._hash = hash;
       this.bindEvents();
diff --git a/app/assets/javascripts/merge_request.js b/app/assets/javascripts/merge_request.js
index ed342b9990f..d1cdcadf87d 100644
--- a/app/assets/javascripts/merge_request.js
+++ b/app/assets/javascripts/merge_request.js
@@ -6,8 +6,6 @@ require('./task_list');
 require('./merge_request_tabs');
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.MergeRequest = (function() {
     function MergeRequest(opts) {
       // Initialize MergeRequest behavior
@@ -16,7 +14,7 @@ require('./merge_request_tabs');
       //   action - String, current controller action
       //
       this.opts = opts != null ? opts : {};
-      this.submitNoteForm = bind(this.submitNoteForm, this);
+      this.submitNoteForm = this.submitNoteForm.bind(this);
       this.$el = $('.merge-request');
       this.$('.show-all-commits').on('click', (function(_this) {
         return function() {
diff --git a/app/assets/javascripts/merge_request_widget.js b/app/assets/javascripts/merge_request_widget.js
index 6f6ae9bde92..3f976680b9d 100644
--- a/app/assets/javascripts/merge_request_widget.js
+++ b/app/assets/javascripts/merge_request_widget.js
@@ -7,8 +7,6 @@ import './smart_interval';
 import MiniPipelineGraph from './mini_pipeline_graph_dropdown';
 
 ((global) => {
-  var indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i += 1) { if (i in this && this[i] === item) return i; } return -1; };
-
   const DEPLOYMENT_TEMPLATE = `<div class="mr-widget-heading" id="<%- id %>">
        <div class="ci_widget ci-success">
          <%= ci_success_icon %>
@@ -258,7 +256,7 @@ import MiniPipelineGraph from './mini_pipeline_graph_dropdown';
       let stateClass = 'btn-danger';
       if (!hasCi) {
         stateClass = 'btn-create';
-      } else if (indexOf.call(allowed_states, state) !== -1) {
+      } else if (allowed_states.indexOf(state) !== -1) {
         switch (state) {
           case "failed":
           case "canceled":
diff --git a/app/assets/javascripts/namespace_select.js b/app/assets/javascripts/namespace_select.js
index 36bc1257cef..426d7f3288e 100644
--- a/app/assets/javascripts/namespace_select.js
+++ b/app/assets/javascripts/namespace_select.js
@@ -2,11 +2,9 @@
 /* global Api */
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   window.NamespaceSelect = (function() {
     function NamespaceSelect(opts) {
-      this.onSelectItem = bind(this.onSelectItem, this);
+      this.onSelectItem = this.onSelectItem.bind(this);
       var fieldName, showAny;
       this.dropdown = opts.dropdown;
       showAny = true;
diff --git a/app/assets/javascripts/new_branch_form.js b/app/assets/javascripts/new_branch_form.js
index 67046d52a65..9d614cdee3a 100644
--- a/app/assets/javascripts/new_branch_form.js
+++ b/app/assets/javascripts/new_branch_form.js
@@ -1,11 +1,8 @@
 /* eslint-disable func-names, space-before-function-paren, no-var, one-var, prefer-rest-params, max-len, vars-on-top, wrap-iife, consistent-return, comma-dangle, one-var-declaration-per-line, quotes, no-return-assign, prefer-arrow-callback, prefer-template, no-shadow, no-else-return, max-len, object-shorthand */
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; },
-    indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i += 1) { if (i in this && this[i] === item) return i; } return -1; };
-
   this.NewBranchForm = (function() {
     function NewBranchForm(form, availableRefs) {
-      this.validate = bind(this.validate, this);
+      this.validate = this.validate.bind(this);
       this.branchNameError = form.find('.js-branch-name-error');
       this.name = form.find('.js-branch-name');
       this.ref = form.find('#ref');
@@ -95,6 +92,8 @@
 
     NewBranchForm.prototype.validate = function() {
       var errorMessage, errors, formatter, unique, validator;
+      const indexOf = [].indexOf;
+
       this.branchNameError.empty();
       unique = function(values, value) {
         if (indexOf.call(values, value) === -1) {
diff --git a/app/assets/javascripts/new_commit_form.js b/app/assets/javascripts/new_commit_form.js
index ad36f08840d..658879607e2 100644
--- a/app/assets/javascripts/new_commit_form.js
+++ b/app/assets/javascripts/new_commit_form.js
@@ -1,12 +1,10 @@
 /* eslint-disable func-names, space-before-function-paren, no-var, prefer-rest-params, wrap-iife, no-return-assign, max-len */
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.NewCommitForm = (function() {
     function NewCommitForm(form, targetBranchName = 'target_branch') {
       this.form = form;
       this.targetBranchName = targetBranchName;
-      this.renderDestination = bind(this.renderDestination, this);
+      this.renderDestination = this.renderDestination.bind(this);
       this.targetBranchDropdown = form.find('button.js-target-branch');
       this.originalBranch = form.find('.js-original-branch');
       this.createMergeRequest = form.find('.js-create-merge-request');
diff --git a/app/assets/javascripts/notes.js b/app/assets/javascripts/notes.js
index 194c29f4710..f6fe6d9f0fd 100644
--- a/app/assets/javascripts/notes.js
+++ b/app/assets/javascripts/notes.js
@@ -22,8 +22,6 @@ const normalizeNewlines = function(str) {
 };
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.Notes = (function() {
     const MAX_VISIBLE_COMMIT_LIST_COUNT = 3;
     const REGEX_SLASH_COMMANDS = /\/\w+/g;
@@ -31,24 +29,24 @@ const normalizeNewlines = function(str) {
     Notes.interval = null;
 
     function Notes(notes_url, note_ids, last_fetched_at, view) {
-      this.updateTargetButtons = bind(this.updateTargetButtons, this);
-      this.updateComment = bind(this.updateComment, this);
-      this.visibilityChange = bind(this.visibilityChange, this);
-      this.cancelDiscussionForm = bind(this.cancelDiscussionForm, this);
-      this.addDiffNote = bind(this.addDiffNote, this);
-      this.setupDiscussionNoteForm = bind(this.setupDiscussionNoteForm, this);
-      this.replyToDiscussionNote = bind(this.replyToDiscussionNote, this);
-      this.removeNote = bind(this.removeNote, this);
-      this.cancelEdit = bind(this.cancelEdit, this);
-      this.updateNote = bind(this.updateNote, this);
-      this.addDiscussionNote = bind(this.addDiscussionNote, this);
-      this.addNoteError = bind(this.addNoteError, this);
-      this.addNote = bind(this.addNote, this);
-      this.resetMainTargetForm = bind(this.resetMainTargetForm, this);
-      this.refresh = bind(this.refresh, this);
-      this.keydownNoteText = bind(this.keydownNoteText, this);
-      this.toggleCommitList = bind(this.toggleCommitList, this);
-      this.postComment = bind(this.postComment, this);
+      this.updateTargetButtons = this.updateTargetButtons.bind(this);
+      this.updateComment = this.updateComment.bind(this);
+      this.visibilityChange = this.visibilityChange.bind(this);
+      this.cancelDiscussionForm = this.cancelDiscussionForm.bind(this);
+      this.addDiffNote = this.addDiffNote.bind(this);
+      this.setupDiscussionNoteForm = this.setupDiscussionNoteForm.bind(this);
+      this.replyToDiscussionNote = this.replyToDiscussionNote.bind(this);
+      this.removeNote = this.removeNote.bind(this);
+      this.cancelEdit = this.cancelEdit.bind(this);
+      this.updateNote = this.updateNote.bind(this);
+      this.addDiscussionNote = this.addDiscussionNote.bind(this);
+      this.addNoteError = this.addNoteError.bind(this);
+      this.addNote = this.addNote.bind(this);
+      this.resetMainTargetForm = this.resetMainTargetForm.bind(this);
+      this.refresh = this.refresh.bind(this);
+      this.keydownNoteText = this.keydownNoteText.bind(this);
+      this.toggleCommitList = this.toggleCommitList.bind(this);
+      this.postComment = this.postComment.bind(this);
 
       this.notes_url = notes_url;
       this.note_ids = note_ids;
diff --git a/app/assets/javascripts/notifications_form.js b/app/assets/javascripts/notifications_form.js
index 5005af90d48..2ab9c4fed2c 100644
--- a/app/assets/javascripts/notifications_form.js
+++ b/app/assets/javascripts/notifications_form.js
@@ -1,10 +1,8 @@
 /* eslint-disable func-names, space-before-function-paren, no-var, prefer-rest-params, wrap-iife, one-var, one-var-declaration-per-line, newline-per-chained-call, comma-dangle, consistent-return, prefer-arrow-callback, max-len */
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.NotificationsForm = (function() {
     function NotificationsForm() {
-      this.toggleCheckbox = bind(this.toggleCheckbox, this);
+      this.toggleCheckbox = this.toggleCheckbox.bind(this);
       this.removeEventListeners();
       this.initEventListeners();
     }
diff --git a/app/assets/javascripts/project_find_file.js b/app/assets/javascripts/project_find_file.js
index e01668eabef..11f9754780d 100644
--- a/app/assets/javascripts/project_find_file.js
+++ b/app/assets/javascripts/project_find_file.js
@@ -2,18 +2,16 @@
 /* global fuzzaldrinPlus */
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.ProjectFindFile = (function() {
     var highlighter;
 
     function ProjectFindFile(element1, options) {
       this.element = element1;
       this.options = options;
-      this.goToBlob = bind(this.goToBlob, this);
-      this.goToTree = bind(this.goToTree, this);
-      this.selectRowDown = bind(this.selectRowDown, this);
-      this.selectRowUp = bind(this.selectRowUp, this);
+      this.goToBlob = this.goToBlob.bind(this);
+      this.goToTree = this.goToTree.bind(this);
+      this.selectRowDown = this.selectRowDown.bind(this);
+      this.selectRowUp = this.selectRowUp.bind(this);
       this.filePaths = {};
       this.inputElement = this.element.find(".file-finder-input");
       // init event
diff --git a/app/assets/javascripts/project_new.js b/app/assets/javascripts/project_new.js
index e9927c1bf51..04b381fe0e0 100644
--- a/app/assets/javascripts/project_new.js
+++ b/app/assets/javascripts/project_new.js
@@ -1,11 +1,9 @@
 /* eslint-disable func-names, space-before-function-paren, no-var, prefer-rest-params, wrap-iife, no-unused-vars, one-var, no-underscore-dangle, prefer-template, no-else-return, prefer-arrow-callback, max-len */
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.ProjectNew = (function() {
     function ProjectNew() {
-      this.toggleSettings = bind(this.toggleSettings, this);
+      this.toggleSettings = this.toggleSettings.bind(this);
       this.$selects = $('.features select');
       this.$repoSelects = this.$selects.filter('.js-repo-select');
 
diff --git a/app/assets/javascripts/right_sidebar.js b/app/assets/javascripts/right_sidebar.js
index a9b3de281e1..b71c3097706 100644
--- a/app/assets/javascripts/right_sidebar.js
+++ b/app/assets/javascripts/right_sidebar.js
@@ -3,11 +3,9 @@
 import Cookies from 'js-cookie';
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.Sidebar = (function() {
     function Sidebar(currentUser) {
-      this.toggleTodo = bind(this.toggleTodo, this);
+      this.toggleTodo = this.toggleTodo.bind(this);
       this.sidebar = $('aside');
       this.removeListeners();
       this.addEventListeners();
diff --git a/app/assets/javascripts/shortcuts.js b/app/assets/javascripts/shortcuts.js
index 85659d7fa39..8ac71797c14 100644
--- a/app/assets/javascripts/shortcuts.js
+++ b/app/assets/javascripts/shortcuts.js
@@ -4,11 +4,9 @@
 import findAndFollowLink from './shortcuts_dashboard_navigation';
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.Shortcuts = (function() {
     function Shortcuts(skipResetBindings) {
-      this.onToggleHelp = bind(this.onToggleHelp, this);
+      this.onToggleHelp = this.onToggleHelp.bind(this);
       this.enabledHelp = [];
       if (!skipResetBindings) {
         Mousetrap.reset();
diff --git a/app/assets/javascripts/single_file_diff.js b/app/assets/javascripts/single_file_diff.js
index 294d087554e..bacb26734c9 100644
--- a/app/assets/javascripts/single_file_diff.js
+++ b/app/assets/javascripts/single_file_diff.js
@@ -1,8 +1,6 @@
 /* eslint-disable func-names, prefer-arrow-callback, space-before-function-paren, no-var, prefer-rest-params, wrap-iife, one-var, one-var-declaration-per-line, consistent-return, no-param-reassign, max-len */
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   window.SingleFileDiff = (function() {
     var COLLAPSED_HTML, ERROR_HTML, LOADING_HTML, WRAPPER;
 
@@ -16,7 +14,7 @@
 
     function SingleFileDiff(file) {
       this.file = file;
-      this.toggleDiff = bind(this.toggleDiff, this);
+      this.toggleDiff = this.toggleDiff.bind(this);
       this.content = $('.diff-content', this.file);
       this.$toggleIcon = $('.diff-toggle-caret', this.file);
       this.diffForPath = this.content.find('[data-diff-for-path]').data('diff-for-path');
diff --git a/app/assets/javascripts/u2f/authenticate.js b/app/assets/javascripts/u2f/authenticate.js
index 500b78fc5d8..cd5280948fd 100644
--- a/app/assets/javascripts/u2f/authenticate.js
+++ b/app/assets/javascripts/u2f/authenticate.js
@@ -10,18 +10,16 @@
 (function() {
   const global = window.gl || (window.gl = {});
 
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   global.U2FAuthenticate = (function() {
     function U2FAuthenticate(container, form, u2fParams, fallbackButton, fallbackUI) {
       this.container = container;
-      this.renderNotSupported = bind(this.renderNotSupported, this);
-      this.renderAuthenticated = bind(this.renderAuthenticated, this);
-      this.renderError = bind(this.renderError, this);
-      this.renderInProgress = bind(this.renderInProgress, this);
-      this.renderTemplate = bind(this.renderTemplate, this);
-      this.authenticate = bind(this.authenticate, this);
-      this.start = bind(this.start, this);
+      this.renderNotSupported = this.renderNotSupported.bind(this);
+      this.renderAuthenticated = this.renderAuthenticated.bind(this);
+      this.renderError = this.renderError.bind(this);
+      this.renderInProgress = this.renderInProgress.bind(this);
+      this.renderTemplate = this.renderTemplate.bind(this);
+      this.authenticate = this.authenticate.bind(this);
+      this.start = this.start.bind(this);
       this.appId = u2fParams.app_id;
       this.challenge = u2fParams.challenge;
       this.form = form;
diff --git a/app/assets/javascripts/u2f/error.js b/app/assets/javascripts/u2f/error.js
index fd1829efe18..3119b3480c3 100644
--- a/app/assets/javascripts/u2f/error.js
+++ b/app/assets/javascripts/u2f/error.js
@@ -2,12 +2,10 @@
 /* global u2f */
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.U2FError = (function() {
     function U2FError(errorCode, u2fFlowType) {
       this.errorCode = errorCode;
-      this.message = bind(this.message, this);
+      this.message = this.message.bind(this);
       this.httpsDisabled = window.location.protocol !== 'https:';
       this.u2fFlowType = u2fFlowType;
     }
diff --git a/app/assets/javascripts/u2f/register.js b/app/assets/javascripts/u2f/register.js
index 17631f2908d..1234d17b8fd 100644
--- a/app/assets/javascripts/u2f/register.js
+++ b/app/assets/javascripts/u2f/register.js
@@ -8,19 +8,17 @@
 // State Flow #1: setup -> in_progress -> registered -> POST to server
 // State Flow #2: setup -> in_progress -> error -> setup
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.U2FRegister = (function() {
     function U2FRegister(container, u2fParams) {
       this.container = container;
-      this.renderNotSupported = bind(this.renderNotSupported, this);
-      this.renderRegistered = bind(this.renderRegistered, this);
-      this.renderError = bind(this.renderError, this);
-      this.renderInProgress = bind(this.renderInProgress, this);
-      this.renderSetup = bind(this.renderSetup, this);
-      this.renderTemplate = bind(this.renderTemplate, this);
-      this.register = bind(this.register, this);
-      this.start = bind(this.start, this);
+      this.renderNotSupported = this.renderNotSupported.bind(this);
+      this.renderRegistered = this.renderRegistered.bind(this);
+      this.renderError = this.renderError.bind(this);
+      this.renderInProgress = this.renderInProgress.bind(this);
+      this.renderSetup = this.renderSetup.bind(this);
+      this.renderTemplate = this.renderTemplate.bind(this);
+      this.register = this.register.bind(this);
+      this.start = this.start.bind(this);
       this.appId = u2fParams.app_id;
       this.registerRequests = u2fParams.register_requests;
       this.signRequests = u2fParams.sign_requests;
diff --git a/app/assets/javascripts/users/calendar.js b/app/assets/javascripts/users/calendar.js
index 32ffa2f0ac0..b11f691e424 100644
--- a/app/assets/javascripts/users/calendar.js
+++ b/app/assets/javascripts/users/calendar.js
@@ -3,12 +3,10 @@
 import d3 from 'd3';
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; };
-
   this.Calendar = (function() {
     function Calendar(timestamps, calendar_activities_path) {
       this.calendar_activities_path = calendar_activities_path;
-      this.clickDay = bind(this.clickDay, this);
+      this.clickDay = this.clickDay.bind(this);
       this.currentSelectedDate = '';
       this.daySpace = 1;
       this.daySize = 15;
diff --git a/app/assets/javascripts/users_select.js b/app/assets/javascripts/users_select.js
index 38462782007..452578d5b98 100644
--- a/app/assets/javascripts/users_select.js
+++ b/app/assets/javascripts/users_select.js
@@ -6,14 +6,13 @@
 window.emitSidebarEvent = window.emitSidebarEvent || $.noop;
 
 (function() {
-  var bind = function(fn, me) { return function() { return fn.apply(me, arguments); }; },
-    slice = [].slice;
+  const slice = [].slice;
 
   this.UsersSelect = (function() {
     function UsersSelect(currentUser, els) {
       var $els;
-      this.users = bind(this.users, this);
-      this.user = bind(this.user, this);
+      this.users = this.users.bind(this);
+      this.user = this.user.bind(this);
       this.usersPath = "/autocomplete/users.json";
       this.userPath = "/autocomplete/users/:id.json";
       if (currentUser != null) {