diff --git a/frontend/src/Metamaps/DataModel/Metacode.js b/frontend/src/Metamaps/DataModel/Metacode.js
index a3d523fd..f9bd06cf 100644
--- a/frontend/src/Metamaps/DataModel/Metacode.js
+++ b/frontend/src/Metamaps/DataModel/Metacode.js
@@ -4,7 +4,7 @@ import outdent from 'outdent'
 
 const Metacode = Backbone.Model.extend({
   initialize: function () {
-    var image = new Image()
+    var image = new window.Image()
     image.crossOrigin = 'Anonymous'
     image.src = this.get('icon')
     this.set('image', image)
diff --git a/frontend/src/Metamaps/DataModel/Synapse.js b/frontend/src/Metamaps/DataModel/Synapse.js
index 2d8f4256..b9a3153b 100644
--- a/frontend/src/Metamaps/DataModel/Synapse.js
+++ b/frontend/src/Metamaps/DataModel/Synapse.js
@@ -11,7 +11,6 @@ import Realtime from '../Realtime'
 import SynapseCard from '../SynapseCard'
 import Visualize from '../Visualize'
 
-
 /*
  * Dependencies:
  *  - Metamaps.Mappings
@@ -46,8 +45,7 @@ const Synapse = Backbone.Model.extend({
 
       if (permBefore === 'private' && model.get('permission') !== 'private') {
         model.trigger('noLongerPrivate')
-      }
-      else if (permBefore !== 'private' && model.get('permission') === 'private') {
+      } else if (permBefore !== 'private' && model.get('permission') === 'private') {
         model.trigger('nowPrivate')
       }
     }
@@ -104,8 +102,8 @@ const Synapse = Backbone.Model.extend({
     return Metamaps.Topics.get(this.get('topic2_id'))
   },
   getDirection: function () {
-    var t1 = this.getTopic1(),
-      t2 = this.getTopic2()
+    var t1 = this.getTopic1()
+    var t2 = this.getTopic2()
 
     return t1 && t2 ? [
       t1.get('node').id,
@@ -130,7 +128,7 @@ const Synapse = Backbone.Model.extend({
       nodeTo: this.get('topic2_id'),
       data: {
         $synapses: [],
-        $synapseIDs: [synapseID],
+        $synapseIDs: [synapseID]
       }
     }
 
@@ -167,7 +165,7 @@ const Synapse = Backbone.Model.extend({
     var edge = this.get('edge')
 
     // update synapse card, if this synapse is the one open there
-    if (onPageWithSynapseCard && edge == SynapseCard.openSynapseCard) {
+    if (onPageWithSynapseCard && edge === SynapseCard.openSynapseCard) {
       SynapseCard.showCard(edge)
     }
   },
diff --git a/frontend/src/Metamaps/DataModel/Topic.js b/frontend/src/Metamaps/DataModel/Topic.js
index 33a9bd3f..3d27814e 100644
--- a/frontend/src/Metamaps/DataModel/Topic.js
+++ b/frontend/src/Metamaps/DataModel/Topic.js
@@ -46,8 +46,7 @@ const Topic = Backbone.Model.extend({
 
       if (permBefore === 'private' && model.get('permission') !== 'private') {
         model.trigger('noLongerPrivate')
-      }
-      else if (permBefore !== 'private' && model.get('permission') === 'private') {
+      } else if (permBefore !== 'private' && model.get('permission') === 'private') {
         model.trigger('nowPrivate')
       }
     }
@@ -87,8 +86,8 @@ const Topic = Backbone.Model.extend({
   authorizeToEdit: function (mapper) {
     if (mapper &&
       (this.get('user_id') === mapper.get('id') ||
-       this.get('calculated_permission') === 'commons' ||
-       this.get('collaborator_ids').includes(mapper.get('id')))) {
+      this.get('calculated_permission') === 'commons' ||
+      this.get('collaborator_ids').includes(mapper.get('id')))) {
       return true
     } else {
       return false
@@ -148,7 +147,7 @@ const Topic = Backbone.Model.extend({
     var onPageWithTopicCard = Active.Map || Active.Topic
     var node = this.get('node')
     // update topic card, if this topic is the one open there
-    if (onPageWithTopicCard && this == TopicCard.openTopicCard) {
+    if (onPageWithTopicCard && this === TopicCard.openTopicCard) {
       TopicCard.showCard(node)
     }
 
@@ -162,7 +161,7 @@ const Topic = Backbone.Model.extend({
     var onPageWithTopicCard = Active.Map || Active.Topic
     var node = this.get('node')
     // update topic card, if this topic is the one open there
-    if (onPageWithTopicCard && this == TopicCard.openTopicCard) {
+    if (onPageWithTopicCard && this === TopicCard.openTopicCard) {
       TopicCard.showCard(node)
     }
   },
diff --git a/frontend/src/Metamaps/DataModel/index.js b/frontend/src/Metamaps/DataModel/index.js
index 4ee6d10d..45da7156 100644
--- a/frontend/src/Metamaps/DataModel/index.js
+++ b/frontend/src/Metamaps/DataModel/index.js
@@ -49,7 +49,7 @@ const DataModel = {
   Mapping: Mapping,
   MappingCollection: MappingCollection,
 
-  init: function() {
+  init: function () {
     var self = DataModel
 
     Metamaps.Metacodes = Metamaps.Metacodes ? new self.MetacodeCollection(Metamaps.Metacodes) : new self.MetacodeCollection()
@@ -93,10 +93,6 @@ const DataModel = {
   }
 }
 
-export {
-  Map, MapCollection, Mapper, MapperCollection, Mapping, MappingCollection,
-  Message, MessageCollection, Metacode, MetacodeCollection,
-  Synapse, SynapseCollection, Topic, TopicCollection
-}
+export { Map, MapCollection, Mapper, MapperCollection, Mapping, MappingCollection, Message, MessageCollection, Metacode, MetacodeCollection, Synapse, SynapseCollection, Topic, TopicCollection }
 
 export default DataModel