fix: modernify code (#2068)

* fix: modernify code

* standard fix

* fixes

src/renderer/main.js

@@ -104,9 +104,7 @@ function onState (err, _state) {
       const TorrentController = require('./controllers/torrent-controller')
       return new TorrentController(state)
     }),
-    torrentList: createGetter(() => {
-      return new TorrentListController(state)
-    }),
+    torrentList: createGetter(() => new TorrentListController(state)),
     update: createGetter(() => {
       const UpdateController = require('./controllers/update-controller')
       return new UpdateController(state)
@@ -155,11 +153,11 @@ function onState (err, _state) {
   // Add YouTube style hotkey shortcuts
   window.addEventListener('keydown', onKeydown)
 
-  const debouncedFullscreenToggle = debounce(function () {
+  const debouncedFullscreenToggle = debounce(() => {
     dispatch('toggleFullScreen')
   }, 1000, true)
 
-  document.addEventListener('wheel', function (event) {
+  document.addEventListener('wheel', event => {
     // ctrlKey detects pinch to zoom, http://crbug.com/289887
     if (event.ctrlKey) {
       event.preventDefault()
@@ -400,7 +398,7 @@ function setupIpc () {
 function backToList () {
   // Exit any modals and screens with a back button
   state.modal = null
-  state.location.backToFirst(function () {
+  state.location.backToFirst(() => {
     // If we were already on the torrent list, scroll to the top
     const contentTag = document.querySelector('.content')
     if (contentTag) contentTag.scrollTop = 0
@@ -590,7 +588,7 @@ function onWindowBoundsChanged (e, newBounds) {
 }
 
 function checkDownloadPath () {
-  fs.stat(state.saved.prefs.downloadPath, function (err, stat) {
+  fs.stat(state.saved.prefs.downloadPath, (err, stat) => {
     if (err) {
       state.downloadPathStatus = 'missing'
       return console.error(err)