fixed eslint error & integrated with prettier as well as formatted the whole codebase (#3450)

lib/main-window.js

@@ -54,12 +54,17 @@ const mainWindow = new BrowserWindow({
   },
   icon: path.resolve(__dirname, '../resources/app.png')
 })
-const url = path.resolve(__dirname, process.env.NODE_ENV === 'development' ? './main.development.html' : './main.production.html')
+const url = path.resolve(
+  __dirname,
+  process.env.NODE_ENV === 'development'
+    ? './main.development.html'
+    : './main.production.html'
+)
 
 mainWindow.loadURL('file://' + url)
 mainWindow.setMenuBarVisibility(false)
 
-mainWindow.webContents.on('new-window', function (e) {
+mainWindow.webContents.on('new-window', function(e) {
   e.preventDefault()
 })
 
@@ -74,10 +79,10 @@ mainWindow.webContents.sendInputEvent({
 })
 
 if (process.platform === 'darwin') {
-  mainWindow.on('close', function (e) {
+  mainWindow.on('close', function(e) {
     e.preventDefault()
     if (mainWindow.isFullScreen()) {
-      mainWindow.once('leave-full-screen', function () {
+      mainWindow.once('leave-full-screen', function() {
         mainWindow.hide()
       })
       mainWindow.setFullScreen(false)
@@ -86,7 +91,7 @@ if (process.platform === 'darwin') {
     }
   })
 
-  app.on('before-quit', function (e) {
+  app.on('before-quit', function(e) {
     mainWindow.removeAllListeners()
   })
 }
@@ -94,7 +99,7 @@ if (process.platform === 'darwin') {
 mainWindow.on('resize', _.throttle(storeWindowSize, 500))
 mainWindow.on('move', _.throttle(storeWindowSize, 500))
 
-function storeWindowSize () {
+function storeWindowSize() {
   try {
     config.set('windowsize', mainWindow.getBounds())
   } catch (e) {
@@ -103,7 +108,7 @@ function storeWindowSize () {
   }
 }
 
-app.on('activate', function () {
+app.on('activate', function() {
   if (mainWindow == null) return null
   mainWindow.show()
 })