diff --git a/src/components/groupedcards.js b/src/components/groupedcards.js
index 25dd78430..466264848 100644
--- a/src/components/groupedcards.js
+++ b/src/components/groupedcards.js
@@ -23,7 +23,8 @@ import ServerConnections from './ServerConnections';
         if (!actionableParent || actionableParent.classList.contains('cardContent')) {
             apiClient.getJSON(apiClient.getUrl('Users/' + userId + '/Items/Latest', options)).then(function (items) {
                 if (items.length === 1) {
-                    return appRouter.showItem(items[0]);
+                    appRouter.showItem(items[0]);
+                    return;
                 }
 
                 const url = 'details?id=' + itemId + '&serverId=' + serverId;
diff --git a/src/components/libraryoptionseditor/libraryoptionseditor.js b/src/components/libraryoptionseditor/libraryoptionseditor.js
index 1f246c8a6..597d74784 100644
--- a/src/components/libraryoptionseditor/libraryoptionseditor.js
+++ b/src/components/libraryoptionseditor/libraryoptionseditor.js
@@ -323,7 +323,8 @@ import template from './libraryoptionseditor.template.html';
     function onImageFetchersContainerClick(e) {
         const btnImageOptionsForType = dom.parentWithClass(e.target, 'btnImageOptionsForType');
         if (btnImageOptionsForType) {
-            return showImageOptionsForType(dom.parentWithClass(btnImageOptionsForType, 'imageFetcher').getAttribute('data-type'));
+            showImageOptionsForType(dom.parentWithClass(btnImageOptionsForType, 'imageFetcher').getAttribute('data-type'));
+            return;
         }
         onSortableContainerClick.call(this, e);
     }
diff --git a/src/components/tvproviders/schedulesdirect.js b/src/components/tvproviders/schedulesdirect.js
index df33008ac..e9770e287 100644
--- a/src/components/tvproviders/schedulesdirect.js
+++ b/src/components/tvproviders/schedulesdirect.js
@@ -122,9 +122,10 @@ export default function (page, providerId, options) {
         const selectedListingsId = $('#selectListing', page).val();
 
         if (!selectedListingsId) {
-            return Dashboard.alert({
+            Dashboard.alert({
                 message: globalize.translate('ErrorPleaseSelectLineup')
             });
+            return;
         }
 
         loading.show();
@@ -168,7 +169,8 @@ export default function (page, providerId, options) {
 
     function refreshListings(value) {
         if (!value) {
-            return $('#selectListing', page).html('');
+            $('#selectListing', page).html('');
+            return;
         }
 
         loading.show();
diff --git a/src/controllers/itemDetails/index.js b/src/controllers/itemDetails/index.js
index 48a3a57e6..a84fbc63d 100644
--- a/src/controllers/itemDetails/index.js
+++ b/src/controllers/itemDetails/index.js
@@ -140,7 +140,8 @@ function renderSeriesTimerSchedule(page, apiClient, seriesTimerId) {
 
 function renderTimerEditor(page, item, apiClient, user) {
     if (item.Type !== 'Recording' || !user.Policy.EnableLiveTvManagement || !item.TimerId || item.Status !== 'InProgress') {
-        return hideAll(page, 'btnCancelTimer');
+        hideAll(page, 'btnCancelTimer');
+        return;
     }
 
     hideAll(page, 'btnCancelTimer', true);
@@ -148,7 +149,8 @@ function renderTimerEditor(page, item, apiClient, user) {
 
 function renderSeriesTimerEditor(page, item, apiClient, user) {
     if (item.Type !== 'SeriesTimer') {
-        return hideAll(page, 'btnCancelSeriesTimer');
+        hideAll(page, 'btnCancelSeriesTimer');
+        return;
     }
 
     if (user.Policy.EnableLiveTvManagement) {
@@ -160,11 +162,13 @@ function renderSeriesTimerEditor(page, item, apiClient, user) {
 
         page.querySelector('.seriesTimerScheduleSection').classList.remove('hide');
         hideAll(page, 'btnCancelSeriesTimer', true);
-        return renderSeriesTimerSchedule(page, apiClient, item.Id);
+        renderSeriesTimerSchedule(page, apiClient, item.Id);
+        return;
     }
 
     page.querySelector('.seriesTimerScheduleSection').classList.add('hide');
-    return hideAll(page, 'btnCancelSeriesTimer');
+    hideAll(page, 'btnCancelSeriesTimer');
+    return;
 }
 
 function renderTrackSelections(page, instance, item, forceReload) {
@@ -807,7 +811,7 @@ function renderNextUp(page, item, user) {
 
     if (item.Type != 'Series') {
         section.classList.add('hide');
-        return undefined;
+        return;
     }
 
     ServerConnections.getApiClient(item.ServerId).getNextUpEpisodes({
@@ -1114,7 +1118,8 @@ function renderMoreFromSeason(view, item, apiClient) {
 
     if (section) {
         if (item.Type !== 'Episode' || !item.SeasonId || !item.SeriesId) {
-            return section.classList.add('hide');
+            section.classList.add('hide');
+            return;
         }
 
         const userId = apiClient.getCurrentUserId();
@@ -1124,7 +1129,8 @@ function renderMoreFromSeason(view, item, apiClient) {
             Fields: 'ItemCounts,PrimaryImageAspectRatio,BasicSyncInfo,CanDelete,MediaSourceCount'
         }).then(function (result) {
             if (result.Items.length < 2) {
-                return section.classList.add('hide');
+                section.classList.add('hide');
+                return;
             }
 
             section.classList.remove('hide');
@@ -1159,10 +1165,12 @@ function renderMoreFromArtist(view, item, apiClient) {
     if (section) {
         if (item.Type === 'MusicArtist') {
             if (!apiClient.isMinServerVersion('3.4.1.19')) {
-                return section.classList.add('hide');
+                section.classList.add('hide');
+                return;
             }
         } else if (item.Type !== 'MusicAlbum' || !item.AlbumArtists || !item.AlbumArtists.length) {
-            return section.classList.add('hide');
+            section.classList.add('hide');
+            return;
         }
 
         const query = {
@@ -1181,7 +1189,8 @@ function renderMoreFromArtist(view, item, apiClient) {
 
         apiClient.getItems(apiClient.getCurrentUserId(), query).then(function (result) {
             if (!result.Items.length) {
-                return section.classList.add('hide');
+                section.classList.add('hide');
+                return;
             }
 
             section.classList.remove('hide');
@@ -1215,7 +1224,8 @@ function renderSimilarItems(page, item, context) {
 
     if (similarCollapsible) {
         if (item.Type != 'Movie' && item.Type != 'Trailer' && item.Type != 'Series' && item.Type != 'Program' && item.Type != 'Recording' && item.Type != 'MusicAlbum' && item.Type != 'MusicArtist' && item.Type != 'Playlist') {
-            return similarCollapsible.classList.add('hide');
+            similarCollapsible.classList.add('hide');
+            return;
         }
 
         similarCollapsible.classList.remove('hide');
@@ -1232,7 +1242,8 @@ function renderSimilarItems(page, item, context) {
 
         apiClient.getSimilarItems(item.Id, options).then(function (result) {
             if (!result.Items.length) {
-                return similarCollapsible.classList.add('hide');
+                similarCollapsible.classList.add('hide');
+                return;
             }
 
             similarCollapsible.classList.remove('hide');
@@ -1820,7 +1831,7 @@ function renderCast(page, item) {
 
     if (!people.length) {
         page.querySelector('#castCollapsible').classList.add('hide');
-        return undefined;
+        return;
     }
 
     page.querySelector('#castCollapsible').classList.remove('hide');
@@ -1915,11 +1926,12 @@ export default function (view, params) {
 
         if (item.Type === 'Program') {
             const apiClient = ServerConnections.getApiClient(item.ServerId);
-            return apiClient.getLiveTvChannel(item.ChannelId, apiClient.getCurrentUserId()).then(function (channel) {
+            apiClient.getLiveTvChannel(item.ChannelId, apiClient.getCurrentUserId()).then(function (channel) {
                 playbackManager.play({
                     items: [channel]
                 });
             });
+            return;
         }
 
         playItem(item, item.UserData && mode === 'resume' ? item.UserData.PlaybackPositionTicks : 0);
diff --git a/src/controllers/list.js b/src/controllers/list.js
index f465d55b5..3a03a854d 100644
--- a/src/controllers/list.js
+++ b/src/controllers/list.js
@@ -721,7 +721,7 @@ class ItemsView {
                 return globalize.translate('Videos');
             }
 
-            return undefined;
+            return;
         }
 
         function play() {
diff --git a/src/controllers/playback/video/index.js b/src/controllers/playback/video/index.js
index 134d30f41..1cb2f4cff 100644
--- a/src/controllers/playback/video/index.js
+++ b/src/controllers/playback/video/index.js
@@ -54,14 +54,16 @@ import { appRouter } from '../../../components/appRouter';
                     recordingButtonManager = null;
                 }
 
-                return view.querySelector('.btnRecord').classList.add('hide');
+                view.querySelector('.btnRecord').classList.add('hide');
+                return;
             }
 
             ServerConnections.getApiClient(item.ServerId).getCurrentUser().then(function (user) {
                 if (user.Policy.EnableLiveTvManagement) {
                     import('../../../components/recordingcreator/recordingbutton').then(({default: RecordingButton}) => {
                         if (recordingButtonManager) {
-                            return recordingButtonManager.refreshItem(item);
+                            recordingButtonManager.refreshItem(item);
+                            return;
                         }
 
                         recordingButtonManager = new RecordingButton({
@@ -1449,7 +1451,8 @@ import { appRouter } from '../../../components/appRouter';
         /* eslint-disable-next-line compat/compat */
         dom.addEventListener(view, window.PointerEvent ? 'pointerdown' : 'click', function (e) {
             if (dom.parentWithClass(e.target, ['videoOsdBottom', 'upNextContainer'])) {
-                return showOsd();
+                showOsd();
+                return;
             }
 
             const pointerType = e.pointerType || (layoutManager.mobile ? 'touch' : 'mouse');
diff --git a/src/controllers/session/forgotPassword/index.js b/src/controllers/session/forgotPassword/index.js
index 9f02a62c1..a0d2b7192 100644
--- a/src/controllers/session/forgotPassword/index.js
+++ b/src/controllers/session/forgotPassword/index.js
@@ -5,17 +5,19 @@ import Dashboard from '../../../scripts/clientUtils';
 
     function processForgotPasswordResult(result) {
         if (result.Action == 'ContactAdmin') {
-            return Dashboard.alert({
+            Dashboard.alert({
                 message: globalize.translate('MessageContactAdminToResetPassword'),
                 title: globalize.translate('ButtonForgotPassword')
             });
+            return;
         }
 
         if (result.Action == 'InNetworkRequired') {
-            return Dashboard.alert({
+            Dashboard.alert({
                 message: globalize.translate('MessageForgotPasswordInNetworkRequired'),
                 title: globalize.translate('ButtonForgotPassword')
             });
+            return;
         }
 
         if (result.Action == 'PinCode') {
@@ -26,13 +28,14 @@ import Dashboard from '../../../scripts/clientUtils';
             msg += '<br/>';
             msg += result.PinFile;
             msg += '<br/>';
-            return Dashboard.alert({
+            Dashboard.alert({
                 message: msg,
                 title: globalize.translate('ButtonForgotPassword'),
                 callback: function () {
                     Dashboard.navigate('forgotpasswordpin.html');
                 }
             });
+            return;
         }
     }
 
diff --git a/src/controllers/session/resetPassword/index.js b/src/controllers/session/resetPassword/index.js
index 252798fd7..fea8e9ca6 100644
--- a/src/controllers/session/resetPassword/index.js
+++ b/src/controllers/session/resetPassword/index.js
@@ -9,13 +9,14 @@ import Dashboard from '../../../scripts/clientUtils';
             msg += '<br/>';
             msg += '<br/>';
             msg += result.UsersReset.join('<br/>');
-            return Dashboard.alert({
+            Dashboard.alert({
                 message: msg,
                 title: globalize.translate('HeaderPasswordReset'),
                 callback: function () {
                     window.location.href = 'index.html';
                 }
             });
+            return;
         }
 
         Dashboard.alert({
diff --git a/src/scripts/libraryMenu.js b/src/scripts/libraryMenu.js
index c3b2400ba..660390598 100644
--- a/src/scripts/libraryMenu.js
+++ b/src/scripts/libraryMenu.js
@@ -645,7 +645,8 @@ import Headroom from 'headroom.js';
         if (!user) {
             showBySelector('.libraryMenuDownloads', false);
             showBySelector('.lnkSyncToOtherDevices', false);
-            return showBySelector('.userMenuOptions', false);
+            showBySelector('.userMenuOptions', false);
+            return;
         }
 
         if (user.Policy.EnableContentDownloading) {
@@ -957,7 +958,8 @@ import Headroom from 'headroom.js';
 
     function setTitle (title) {
         if (title == null) {
-            return LibraryMenu.setDefaultTitle();
+            LibraryMenu.setDefaultTitle();
+            return;
         }
 
         if (title === '-') {