diff --git a/web/src/js/components/ContentView/UploadContentButton.jsx b/web/src/js/components/ContentView/UploadContentButton.jsx
index 6764e2341..de349af4b 100644
--- a/web/src/js/components/ContentView/UploadContentButton.jsx
+++ b/web/src/js/components/ContentView/UploadContentButton.jsx
@@ -6,9 +6,7 @@ UploadContentButton.propTypes = {
 }
 
 export default function UploadContentButton({ uploadContent }) {
-
-    let fileInput;
-
+    
     return (
         <FileChooser
             icon="fa-upload"
diff --git a/web/src/js/components/common/Dropdown.jsx b/web/src/js/components/common/Dropdown.jsx
index 9db131d43..cc95a6dcf 100644
--- a/web/src/js/components/common/Dropdown.jsx
+++ b/web/src/js/components/common/Dropdown.jsx
@@ -1,7 +1,7 @@
 import React, { Component, PropTypes } from 'react'
 import classnames from 'classnames'
 
-export function Divider () { return  <hr className="divider"/>}
+export const Divider = () => <hr className="divider"/>
 
 export default class Dropdown extends Component {
 
diff --git a/web/src/js/ducks/ui/flow.js b/web/src/js/ducks/ui/flow.js
index 22a8c22d7..e65c39a3f 100644
--- a/web/src/js/ducks/ui/flow.js
+++ b/web/src/js/ducks/ui/flow.js
@@ -152,6 +152,5 @@ export function setContent(content){
 }
 
 export function stopEdit(flow, modifiedFlow) {
-    let diff = getDiff(flow, modifiedFlow)
-    return flowsActions.update(flow, diff)
+    return flowsActions.update(flow, getDiff(flow, modifiedFlow))
 }
diff --git a/web/src/js/utils.js b/web/src/js/utils.js
index e44182d0d..e8470cec4 100644
--- a/web/src/js/utils.js
+++ b/web/src/js/utils.js
@@ -107,14 +107,15 @@ fetchApi.put = (url, json, options) => fetchApi(
         ...options
     }
 )
-
+// deep comparison of two json objects (dicts). arrays are handeled as a single value.
+// return: json object including only the changed keys value pairs.
 export function getDiff(obj1, obj2) {
     let result = {...obj2};
     for(let key in obj1) {
         if(_.isEqual(obj2[key], obj1[key]))
             result[key] = undefined
-        else if(!(Array.isArray(obj2[key]) && Array.isArray(obj1[key])) &&
-                typeof obj2[key] == 'object' && typeof obj1[key] == 'object')
+        else if(Object.prototype.toString.call(obj2[key]) === '[object Object]' &&
+                Object.prototype.toString.call(obj1[key]) === '[object Object]' )
             result[key] = getDiff(obj1[key], obj2[key])
     }
     return result