diff --git a/browser/lib/context.js b/browser/lib/context.js
index 417712b8..6c82e6a2 100644
--- a/browser/lib/context.js
+++ b/browser/lib/context.js
@@ -2,7 +2,7 @@ const { remote } = require('electron')
 const { Menu, MenuItem } = remote
 
 function popup (templates) {
-  let menu = new Menu()
+  const menu = new Menu()
   templates.forEach((item) => {
     menu.append(new MenuItem(item))
   })
diff --git a/browser/main/NoteList/index.js b/browser/main/NoteList/index.js
index 8adaf1a0..24799641 100644
--- a/browser/main/NoteList/index.js
+++ b/browser/main/NoteList/index.js
@@ -169,9 +169,8 @@ class NoteList extends React.Component {
     if (this.notes == null || this.notes.length === 0) {
       return
     }
-    let { router } = this.context
-    let { location } = this.props
-    let { selectedNoteKeys, shiftKeyDown } = this.state
+    let { selectedNoteKeys } = this.state
+    const { shiftKeyDown } = this.state
 
     let targetIndex = this.getTargetIndex()
 
@@ -197,9 +196,8 @@ class NoteList extends React.Component {
     if (this.notes == null || this.notes.length === 0) {
       return
     }
-    let { router } = this.context
-    let { location } = this.props
-    let { selectedNoteKeys, shiftKeyDown } = this.state
+    let { selectedNoteKeys } = this.state
+    const { shiftKeyDown } = this.state
 
     let targetIndex = this.getTargetIndex()
     const isTargetLastNote = targetIndex === this.notes.length - 1
@@ -240,7 +238,6 @@ class NoteList extends React.Component {
   }
 
   handleNoteListKeyDown (e) {
-    const { shiftKeyDown } = this.state
     if (e.metaKey || e.ctrlKey) return true
 
     if (e.keyCode === 65 && !e.shiftKey) {
@@ -282,7 +279,7 @@ class NoteList extends React.Component {
   getNotes () {
     const { data, params, location } = this.props
 
-    if (location.pathname.match(/\/home/) || location.pathname.match(/\alltags/)) {
+    if (location.pathname.match(/\/home/) || location.pathname.match(/alltags/)) {
       const allNotes = data.noteMap.map((note) => note)
       this.contextNotes = allNotes
       return allNotes
@@ -353,9 +350,10 @@ class NoteList extends React.Component {
   }
 
   handleNoteClick (e, uniqueKey) {
-    let { router } = this.context
-    let { location } = this.props
-    let { shiftKeyDown, selectedNoteKeys } = this.state
+    const { router } = this.context
+    const { location } = this.props
+    let { selectedNoteKeys } = this.state
+    const { shiftKeyDown } = this.state
 
     if (shiftKeyDown && selectedNoteKeys.includes(uniqueKey)) {
       const newSelectedNoteKeys = selectedNoteKeys.filter((noteKey) => noteKey !== uniqueKey)
@@ -640,9 +638,10 @@ class NoteList extends React.Component {
   }
 
   render () {
-    let { location, notes, config, dispatch } = this.props
-    let { selectedNoteKeys } = this.state
-    let sortFunc = config.sortBy === 'CREATED_AT'
+    const { location, config } = this.props
+    let { notes } = this.props
+    const { selectedNoteKeys } = this.state
+    const sortFunc = config.sortBy === 'CREATED_AT'
       ? sortByCreatedAt
       : config.sortBy === 'ALPHABETICAL'
       ? sortByAlphabetical
@@ -687,7 +686,6 @@ class NoteList extends React.Component {
           config.sortBy === 'CREATED_AT'
             ? note.createdAt : note.updatedAt
         ).fromNow('D')
-        const key = `${note.storage}-${note.key}`
 
         if (isDefault) {
           return (
diff --git a/browser/main/SideNav/StorageItem.js b/browser/main/SideNav/StorageItem.js
index bbf87306..5d7e6005 100644
--- a/browser/main/SideNav/StorageItem.js
+++ b/browser/main/SideNav/StorageItem.js
@@ -8,12 +8,10 @@ import CreateFolderModal from 'browser/main/modals/CreateFolderModal'
 import RenameFolderModal from 'browser/main/modals/RenameFolderModal'
 import dataApi from 'browser/main/lib/dataApi'
 import StorageItemChild from 'browser/components/StorageItem'
-import eventEmitter from 'browser/main/lib/eventEmitter'
 import _ from 'lodash'
-import * as path from 'path'
 
 const { remote } = require('electron')
-const { Menu, MenuItem, dialog } = remote
+const { Menu, dialog } = remote
 
 class StorageItem extends React.Component {
   constructor (props) {
diff --git a/browser/main/modals/PreferencesModal/InfoTab.js b/browser/main/modals/PreferencesModal/InfoTab.js
index ac3afb0b..48f1ea01 100644
--- a/browser/main/modals/PreferencesModal/InfoTab.js
+++ b/browser/main/modals/PreferencesModal/InfoTab.js
@@ -31,7 +31,7 @@ class InfoTab extends React.Component {
   }
 
   handleSaveButtonClick (e) {
-    let newConfig = {
+    const newConfig = {
       amaEnabled: this.state.config.amaEnabled
     }
 
@@ -140,7 +140,7 @@ class InfoTab extends React.Component {
         <div styleName='policy'>Analytics</div>
         <div>Boostnote collects anonymous data for the sole purpose of improving the application, and strictly does not collect any personal information such the contents of your notes.</div>
         <div>You can see how it works on <a href='https://github.com/BoostIO/Boostnote' onClick={(e) => this.handleLinkClick(e)}>GitHub</a>.</div>
-        <br/>
+        <br />
         <div>You can choose to enable or disable this option.</div>
         <input onChange={(e) => this.handleConfigChange(e)}
           checked={this.state.config.amaEnabled}
@@ -149,7 +149,7 @@ class InfoTab extends React.Component {
         />
         Enable analytics to help improve Boostnote<br />
         <button styleName='policy-submit' onClick={(e) => this.handleSaveButtonClick(e)}>Save</button>
-        <br/>
+        <br />
         {this.infoMessage()}
       </div>
     )
diff --git a/browser/main/modals/PreferencesModal/StoragesTab.js b/browser/main/modals/PreferencesModal/StoragesTab.js
index 76e69f87..f66a617e 100644
--- a/browser/main/modals/PreferencesModal/StoragesTab.js
+++ b/browser/main/modals/PreferencesModal/StoragesTab.js
@@ -167,7 +167,7 @@ class StoragesTab extends React.Component {
                 <option value='FILESYSTEM'>File System</option>
               </select>
               <div styleName='addStorage-body-section-type-description'>
-                Setting up 3rd-party cloud storage integration: 
+                Setting up 3rd-party cloud storage integration:{' '}
                 <a href='https://github.com/BoostIO/Boostnote/wiki/Cloud-Syncing-and-Backup'
                   onClick={(e) => this.handleLinkClick(e)}
                 >Cloud-Syncing-and-Backup</a>
diff --git a/browser/main/modals/PreferencesModal/index.js b/browser/main/modals/PreferencesModal/index.js
index 228a08f4..574b5186 100644
--- a/browser/main/modals/PreferencesModal/index.js
+++ b/browser/main/modals/PreferencesModal/index.js
@@ -1,6 +1,5 @@
 import PropTypes from 'prop-types'
 import React from 'react'
-import ReactDOM from 'react-dom'
 import { connect } from 'react-redux'
 import HotkeyTab from './HotkeyTab'
 import UiTab from './UiTab'
@@ -11,6 +10,7 @@ import ModalEscButton from 'browser/components/ModalEscButton'
 import CSSModules from 'browser/lib/CSSModules'
 import styles from './PreferencesModal.styl'
 import RealtimeNotification from 'browser/components/RealtimeNotification'
+import _ from 'lodash'
 
 class Preferences extends React.Component {
   constructor (props) {
@@ -94,8 +94,8 @@ class Preferences extends React.Component {
   }
 
   getContentBoundingBox () {
-    const node = ReactDOM.findDOMNode(this.refs.content)
-    return node.getBoundingClientRect()
+    console.log(this.refs.content.getBoundingClientRect())
+    return this.refs.content.getBoundingClientRect()
   }
 
   haveToSaveNotif (type, message) {
diff --git a/browser/main/store.js b/browser/main/store.js
index 36e7850d..abd34889 100644
--- a/browser/main/store.js
+++ b/browser/main/store.js
@@ -355,11 +355,9 @@ function data (state = defaultDataMap(), action) {
       state.storageMap.set(action.storage.key, action.storage)
       return state
     case 'EXPORT_FOLDER':
-      {
-        state = Object.assign({}, state)
-        state.storageMap = new Map(state.storageMap)
-        state.storageMap.set(action.storage.key, action.storage)
-      }
+      state = Object.assign({}, state)
+      state.storageMap = new Map(state.storageMap)
+      state.storageMap.set(action.storage.key, action.storage)
       return state
     case 'DELETE_FOLDER':
       {