diff --git a/src/components/structures/AutoHideScrollbar.js b/src/components/structures/AutoHideScrollbar.js
index 66c3b0d6e1..507af2c5f0 100644
--- a/src/components/structures/AutoHideScrollbar.js
+++ b/src/components/structures/AutoHideScrollbar.js
@@ -19,20 +19,20 @@ import React from "react";
 // derived from code from github.com/noeldelgado/gemini-scrollbar
 // Copyright (c) Noel Delgado <pixelia.me@gmail.com> (pixelia.me)
 function getScrollbarWidth(alternativeOverflow) {
-    var e = document.createElement('div'), sw;
-    e.style.position = 'absolute';
-    e.style.top = '-9999px';
-    e.style.width = '100px';
-    e.style.height = '100px';
-    e.style.overflow = "scroll";
+    const div = document.createElement('div');
+    div.style.position = 'absolute';
+    div.style.top = '-9999px';
+    div.style.width = '100px';
+    div.style.height = '100px';
+    div.style.overflow = "scroll";
     if (alternativeOverflow) {
-        e.style.overflow = alternativeOverflow;
+        div.style.overflow = alternativeOverflow;
     }
-    e.style.msOverflowStyle = '-ms-autohiding-scrollbar';
-    document.body.appendChild(e);
-    sw = (e.offsetWidth - e.clientWidth);
-    document.body.removeChild(e);
-    return sw;
+    div.style.msOverflowStyle = '-ms-autohiding-scrollbar';
+    document.body.appendChild(div);
+    const scrollbarWidth = (div.offsetWidth - div.clientWidth);
+    document.body.removeChild(div);
+    return scrollbarWidth;
 }
 
 function install() {
@@ -60,11 +60,10 @@ const installBodyClassesIfNeeded = (function() {
             install();
             installed = true;
         }
-    }
+    };
 })();
 
 export default class AutoHideScrollbar extends React.Component {
-
     constructor(props) {
         super(props);
         this.onOverflow = this.onOverflow.bind(this);
diff --git a/src/components/structures/LeftPanel.js b/src/components/structures/LeftPanel.js
index cd4c81bd2c..247b12dc88 100644
--- a/src/components/structures/LeftPanel.js
+++ b/src/components/structures/LeftPanel.js
@@ -179,10 +179,9 @@ const LeftPanel = React.createClass({
         const RoomList = sdk.getComponent('rooms.RoomList');
         const TagPanel = sdk.getComponent('structures.TagPanel');
         const TopLeftMenuButton = sdk.getComponent('structures.TopLeftMenuButton');
-        const BottomLeftMenu = sdk.getComponent('structures.BottomLeftMenu');
         const CallPreview = sdk.getComponent('voip.CallPreview');
 
-        let topBox = <TopLeftMenuButton collapsed={ this.props.collapsed }/>;
+        const topBox = <TopLeftMenuButton collapsed={ this.props.collapsed } />;
 /*
         const SearchBox = sdk.getComponent('structures.SearchBox');
         const topBox = <SearchBox collapsed={ this.props.collapsed } onSearch={ this.onSearch } />;
diff --git a/src/components/structures/TopLeftMenuButton.js b/src/components/structures/TopLeftMenuButton.js
index 71ca382e92..00e669acdd 100644
--- a/src/components/structures/TopLeftMenuButton.js
+++ b/src/components/structures/TopLeftMenuButton.js
@@ -26,7 +26,6 @@ import Avatar from '../../Avatar';
 const AVATAR_SIZE = 28;
 
 export default class TopLeftMenuButton extends React.Component {
-
     static propTypes = {
         collapsed: PropTypes.bool.isRequired,
     };
diff --git a/src/components/views/context_menus/TopLeftMenu.js b/src/components/views/context_menus/TopLeftMenu.js
index ec3120cfea..76ac10399c 100644
--- a/src/components/views/context_menus/TopLeftMenu.js
+++ b/src/components/views/context_menus/TopLeftMenu.js
@@ -19,7 +19,6 @@ import dis from '../../../dispatcher';
 import { _t } from '../../../languageHandler';
 
 export class TopLeftMenu extends React.Component {
-
     constructor() {
         super();
         this.openSettings = this.openSettings.bind(this);
diff --git a/src/resizer/distributors.js b/src/resizer/distributors.js
index a81925a763..29e97e0bce 100644
--- a/src/resizer/distributors.js
+++ b/src/resizer/distributors.js
@@ -74,7 +74,6 @@ class CollapseDistributor extends FixedDistributor {
 }
 
 class PercentageDistributor {
-
     constructor(sizer, item, _config, items, container) {
         this.container = container;
         this.totalSize = sizer.getTotalSize();
diff --git a/src/resizer/room.js b/src/resizer/room.js
index a6ad0b5dc2..3d68d16f9b 100644
--- a/src/resizer/room.js
+++ b/src/resizer/room.js
@@ -34,7 +34,6 @@ class RoomSizer extends Sizer {
             item.style.maxHeight = `${Math.round(size)}px`;
         }
     }
-
 }
 
 class RoomDistributor extends FixedDistributor {