diff --git a/js/components/ascribe_detail/edition_container.js b/js/components/ascribe_detail/edition_container.js
index 15086434..2194123d 100644
--- a/js/components/ascribe_detail/edition_container.js
+++ b/js/components/ascribe_detail/edition_container.js
@@ -50,7 +50,7 @@ let EditionContainer = React.createClass({
     },
 
     render() {
-        if('title' in this.state.edition) {
+        if(this.state.edition && this.state.edition.title) {
             return (
                 <Edition
                     edition={this.state.edition}
diff --git a/js/components/ascribe_detail/piece_container.js b/js/components/ascribe_detail/piece_container.js
index 7297825d..5726fd16 100644
--- a/js/components/ascribe_detail/piece_container.js
+++ b/js/components/ascribe_detail/piece_container.js
@@ -206,7 +206,7 @@ let PieceContainer = React.createClass({
     },
 
     render() {
-        if('title' in this.state.piece) {
+        if(this.state.piece && this.state.piece.title) {
             return (
                 <Piece
                     piece={this.state.piece}
diff --git a/js/components/ascribe_forms/form.js b/js/components/ascribe_forms/form.js
index 115a8d8e..f54ab06d 100644
--- a/js/components/ascribe_forms/form.js
+++ b/js/components/ascribe_forms/form.js
@@ -70,7 +70,7 @@ let Form = React.createClass({
         }
 
         for(let ref in this.refs) {
-            if (typeof this.refs[ref].reset === 'function'){
+            if (this.refs[ref].reset && typeof this.refs[ref].reset === 'function'){
                 this.refs[ref].reset();
             }
         }
@@ -86,7 +86,7 @@ let Form = React.createClass({
         this.clearErrors();
 
         // selecting http method based on props
-        if(this[this.props.method]) {
+        if(this[this.props.method] && typeof this[this.props.method] === 'function') {
             window.setTimeout(() => this[this.props.method](), 100);
         } else {
             throw new Error('This HTTP method is not supported by form.js (' + this.props.method + ')');
@@ -109,11 +109,11 @@ let Form = React.createClass({
 
     getFormData() {
         let data = {};
-        for (let ref in this.refs){
+        for(let ref in this.refs){
             data[this.refs[ref].props.name] = this.refs[ref].state.value;
         }
 
-        if (this.props.getFormData){
+        if (this.props.getFormData && typeof this.props.getFormData === 'function'){
             data = mergeOptionsWithDuplicates(data, this.props.getFormData());
         }
 
@@ -125,11 +125,12 @@ let Form = React.createClass({
     },
 
     handleSuccess(response){
-        if ('handleSuccess' in this.props){
+        if(this.props.handleSuccess && typeof this.props.handleSuccess === 'function') {
             this.props.handleSuccess(response);
         }
-        for (var ref in this.refs){
-            if ('handleSuccess' in this.refs[ref]){
+
+        for(let ref in this.refs) {
+            if(this.refs[ref] && this.refs[ref].handleSuccess && typeof this.refs[ref].handleSuccess === 'function'){
                 this.refs[ref].handleSuccess();
             }
         }
@@ -141,7 +142,7 @@ let Form = React.createClass({
 
     handleError(err){
         if (err.json) {
-            for (var input in err.json.errors){
+            for (let input in err.json.errors){
                 if (this.refs && this.refs[input] && this.refs[input].state) {
                     this.refs[input].setErrors(err.json.errors[input]);
                 } else {
@@ -171,8 +172,8 @@ let Form = React.createClass({
     },
 
     clearErrors(){
-        for (var ref in this.refs){
-            if ('clearErrors' in this.refs[ref]){
+        for(let ref in this.refs){
+            if (this.refs[ref] && this.refs[ref].clearErrors && typeof this.refs[ref].clearErrors === 'function'){
                 this.refs[ref].clearErrors();
             }
         }
@@ -221,7 +222,7 @@ let Form = React.createClass({
     },
 
     renderChildren() {
-        return ReactAddons.Children.map(this.props.children, (child, i) => {
+        return ReactAddons.Children.map(this.props.children, (child) => {
             if (child) {
                 return ReactAddons.addons.cloneWithProps(child, {
                     handleChange: this.handleChangeChild,
diff --git a/js/components/ascribe_forms/property.js b/js/components/ascribe_forms/property.js
index de88e1a0..61c5c96e 100644
--- a/js/components/ascribe_forms/property.js
+++ b/js/components/ascribe_forms/property.js
@@ -29,8 +29,11 @@ let Property = React.createClass({
         handleChange: React.PropTypes.func,
         ignoreFocus: React.PropTypes.bool,
         className: React.PropTypes.string,
+
         onClick: React.PropTypes.func,
         onChange: React.PropTypes.func,
+        onBlur: React.PropTypes.func,
+
         children: React.PropTypes.oneOfType([
             React.PropTypes.arrayOf(React.PropTypes.element),
             React.PropTypes.element
@@ -109,7 +112,7 @@ let Property = React.createClass({
     handleChange(event) {
 
         this.props.handleChange(event);
-        if ('onChange' in this.props) {
+        if (this.props.onChange && typeof this.props.onChange === 'function') {
             this.props.onChange(event);
         }
 
@@ -125,7 +128,7 @@ let Property = React.createClass({
 
         // if onClick is defined from the outside,
         // just call it
-        if(this.props.onClick) {
+        if(this.props.onClick && typeof this.props.onClick === 'function') {
             this.props.onClick();
         }
 
@@ -140,7 +143,7 @@ let Property = React.createClass({
             isFocused: false
         });
 
-        if(this.props.onBlur) {
+        if(this.props.onBlur && typeof this.props.onBlur === 'function') {
             this.props.onBlur(event);
         }
     },
@@ -198,6 +201,7 @@ let Property = React.createClass({
     },
 
     render() {
+        let footer = null;
         let tooltip = <span/>;
         let style = this.props.style ? mergeOptions({}, this.props.style) : {};
 
@@ -207,7 +211,7 @@ let Property = React.createClass({
                     {this.props.tooltip}
                 </Tooltip>);
         }
-        let footer = null;
+        
         if(this.props.footer){
             footer = (
                 <div className="ascribe-property-footer">
diff --git a/js/components/ascribe_slides_container/slides_container.js b/js/components/ascribe_slides_container/slides_container.js
index 8b800377..c78478f1 100644
--- a/js/components/ascribe_slides_container/slides_container.js
+++ b/js/components/ascribe_slides_container/slides_container.js
@@ -4,13 +4,12 @@ import React from 'react';
 import Router from 'react-router';
 import ReactAddons from 'react/addons';
 
-import Col from 'react-bootstrap/lib/Col';
-
 import SlidesContainerBreadcrumbs from './slides_container_breadcrumbs';
 
 let State = Router.State;
 let Navigation = Router.Navigation;
 
+
 let SlidesContainer = React.createClass({
     propTypes: {
         children: React.PropTypes.arrayOf(React.PropTypes.element),
@@ -30,12 +29,15 @@ let SlidesContainer = React.createClass({
         let slideNum = -1;
         let startFrom = -1;
 
-        if(queryParams && 'slide_num' in queryParams) {
+        // We can actually need to check if slide_num is present as a key in queryParams.
+        // We do not really care about its value though...
+        if(queryParams && 'slide_num' in queryParams.slide_num) {
             slideNum = parseInt(queryParams.slide_num, 10);
         }
         // if slide_num is not set, this will be done in componentDidMount
 
         // the query param 'start_from' removes all slide children before the respective number
+        // Also, we use the 'in' keyword for the same reason as above in 'slide_num'
         if(queryParams && 'start_from' in queryParams) {
             startFrom = parseInt(queryParams.start_from, 10);
         }
@@ -51,6 +53,9 @@ let SlidesContainer = React.createClass({
     componentDidMount() {
         // check if slide_num was defined, and if not then default to 0
         let queryParams = this.getQuery();
+
+        // We use 'in' to check if the key is present in the user's browser url bar,
+        // we do not really care about its value at this point
         if(!('slide_num' in queryParams)) {
 
             // we're first requiring all the other possible queryParams and then set
diff --git a/js/components/whitelabel/prize/components/ascribe_detail/prize_piece_container.js b/js/components/whitelabel/prize/components/ascribe_detail/prize_piece_container.js
index 4b785fc2..822557db 100644
--- a/js/components/whitelabel/prize/components/ascribe_detail/prize_piece_container.js
+++ b/js/components/whitelabel/prize/components/ascribe_detail/prize_piece_container.js
@@ -90,14 +90,23 @@ let PieceContainer = React.createClass({
     },
 
     render() {
-        if('title' in this.state.piece) {
+        if(this.state.piece && this.state.piece.title) {
+            /*
+            
+                This really needs a refactor!
+
+                    - Tim
+
+             */
             // Only show the artist name if you are the participant or if you are a judge and the piece is shortlisted
             let artistName = ((this.state.currentUser.is_jury && !this.state.currentUser.is_judge) ||
                 (this.state.currentUser.is_judge && !this.state.piece.selected )) ?
                 <span className="glyphicon glyphicon-eye-close" aria-hidden="true"/> : this.state.piece.artist_name;
+            
             // Only show the artist email if you are a judge and the piece is shortlisted
             let artistEmail = (this.state.currentUser.is_judge && this.state.piece.selected ) ?
                 <DetailProperty label={getLangText('REGISTREE')} value={ this.state.piece.user_registered } /> : null;
+
             return (
                 <Piece
                     piece={this.state.piece}
diff --git a/js/components/whitelabel/wallet/components/cyland/ascribe_detail/cyland_piece_container.js b/js/components/whitelabel/wallet/components/cyland/ascribe_detail/cyland_piece_container.js
index 75ccab10..395cd86e 100644
--- a/js/components/whitelabel/wallet/components/cyland/ascribe_detail/cyland_piece_container.js
+++ b/js/components/whitelabel/wallet/components/cyland/ascribe_detail/cyland_piece_container.js
@@ -68,7 +68,7 @@ let CylandPieceContainer = React.createClass({
     },
 
     render() {
-        if('title' in this.state.piece) {
+        if(this.state.piece && this.state.piece.title) {
             return (
                 <Piece
                     piece={this.state.piece}
diff --git a/js/components/whitelabel/wallet/components/cyland/cyland_register_piece.js b/js/components/whitelabel/wallet/components/cyland/cyland_register_piece.js
index d1363a51..3768adab 100644
--- a/js/components/whitelabel/wallet/components/cyland/cyland_register_piece.js
+++ b/js/components/whitelabel/wallet/components/cyland/cyland_register_piece.js
@@ -72,6 +72,9 @@ let CylandRegisterPiece = React.createClass({
         // we may need to enter the process at step 1 or 2.
         // If this is the case, we'll need the piece number to complete submission.
         // It is encoded in the URL as a queryParam and we're checking for it here.
+        //
+        // We're using 'in' here as we want to know if 'piece_id' is present in the url,
+        // we don't care about the value.
         if(queryParams && 'piece_id' in queryParams) {
             PieceActions.fetchOne(queryParams.piece_id);
         }
diff --git a/js/components/whitelabel/wallet/components/ikonotv/ascribe_detail/ikonotv_piece_container.js b/js/components/whitelabel/wallet/components/ikonotv/ascribe_detail/ikonotv_piece_container.js
index 7f094a26..276cebad 100644
--- a/js/components/whitelabel/wallet/components/ikonotv/ascribe_detail/ikonotv_piece_container.js
+++ b/js/components/whitelabel/wallet/components/ikonotv/ascribe_detail/ikonotv_piece_container.js
@@ -133,7 +133,7 @@ let IkonotvPieceContainer = React.createClass({
     },
 
     render() {
-        if('title' in this.state.piece) {
+        if(this.state.piece && this.state.piece.title) {
             return (
                 <Piece
                     piece={this.state.piece}