diff --git a/src/components/playback/playbackmanager.js b/src/components/playback/playbackmanager.js
index ed06e3eef3..8502b551af 100644
--- a/src/components/playback/playbackmanager.js
+++ b/src/components/playback/playbackmanager.js
@@ -8,7 +8,7 @@ import * as userSettings from 'userSettings';
 import globalize from 'globalize';
 import connectionManager from 'connectionManager';
 import loading from 'loading';
-import apphost from 'apphost';
+import appHost from 'apphost';
 import screenfull from 'screenfull';
 
 function enableLocalPlaylistManagement(player) {
@@ -322,7 +322,7 @@ function getAudioStreamUrl(item, transcodingProfile, directPlayContainers, maxBi
         PlaySessionId: startingPlaySession,
         StartTimeTicks: startPosition || 0,
         EnableRedirection: true,
-        EnableRemoteMedia: apphost.supports('remoteaudio')
+        EnableRemoteMedia: appHost.supports('remoteaudio')
     });
 }
 
@@ -606,7 +606,7 @@ function supportsDirectPlay(apiClient, item, mediaSource) {
     const isFolderRip = mediaSource.VideoType === 'BluRay' || mediaSource.VideoType === 'Dvd' || mediaSource.VideoType === 'HdDvd';
 
     if (mediaSource.SupportsDirectPlay || isFolderRip) {
-        if (mediaSource.IsRemote && !apphost.supports('remotevideo')) {
+        if (mediaSource.IsRemote && !appHost.supports('remotevideo')) {
             return Promise.resolve(false);
         }
 
@@ -3156,7 +3156,7 @@ class PlaybackManager {
             return streamInfo ? streamInfo.playbackStartTimeTicks : null;
         };
 
-        if (apphost.supports('remotecontrol')) {
+        if (appHost.supports('remotecontrol')) {
             import('serverNotifications').then(({ default: serverNotifications }) => {
                 events.on(serverNotifications, 'ServerShuttingDown', self.setDefaultPlayerActive.bind(self));
                 events.on(serverNotifications, 'ServerRestarting', self.setDefaultPlayerActive.bind(self));
@@ -3520,7 +3520,7 @@ class PlaybackManager {
                 'PlayTrailers'
             ];
 
-            if (appHost.default.supports('fullscreenchange')) {
+            if (appHost.supports('fullscreenchange')) {
                 list.push('ToggleFullscreen');
             }
 
diff --git a/src/controllers/livetvstatus.js b/src/controllers/livetvstatus.js
index f37760808a..7555b04b99 100644
--- a/src/controllers/livetvstatus.js
+++ b/src/controllers/livetvstatus.js
@@ -15,12 +15,10 @@ import 'emby-button';
 const enableFocusTransform = !browser.slow && !browser.edge;
 
 function getDeviceHtml(device) {
-    let padderClass;
+    const padderClass = 'cardPadder-backdrop';
+    let cssClass = 'card scalableCard backdropCard backdropCard-scalable';
+    const cardBoxCssClass = 'cardBox visualCardBox';
     let html = '';
-    let cssClass = 'card scalableCard';
-    let cardBoxCssClass = 'cardBox visualCardBox';
-    cssClass += ' backdropCard backdropCard-scalable';
-    padderClass = 'cardPadder-backdrop';
 
     // TODO move card creation code to Card component
 
diff --git a/src/plugins/bookPlayer/plugin.js b/src/plugins/bookPlayer/plugin.js
index afd7052e1d..d35e248893 100644
--- a/src/plugins/bookPlayer/plugin.js
+++ b/src/plugins/bookPlayer/plugin.js
@@ -123,8 +123,8 @@ export class BookPlayer {
 
     onTouchStart(e) {
         // TODO: depending on the event this can be the document or the rendition itself
-        let rendition = this._rendition || this;
-        let book = rendition.book;
+        const rendition = this._rendition || this;
+        const book = rendition.book;
 
         // check that the event is from the book or the document
         if (!book || this._loaded === false) return;
@@ -132,7 +132,8 @@ export class BookPlayer {
         // epubjs stores pages off the screen or something for preloading
         // get the modulus of the touch event to account for the increased width
         if (!e.touches || e.touches.length === 0) return;
-        let touch = e.touches[0].clientX % dom.getWindowSize().innerWidth;
+
+        const touch = e.touches[0].clientX % dom.getWindowSize().innerWidth;
         if (touch < dom.getWindowSize().innerWidth / 2) {
             book.package.metadata.direction === 'rtl' ? rendition.next() : rendition.prev();
         } else {