diff --git a/modules/RTC/DataChannels.js b/modules/RTC/DataChannels.js
index a97efc03c..11ccdefbc 100644
--- a/modules/RTC/DataChannels.js
+++ b/modules/RTC/DataChannels.js
@@ -167,14 +167,13 @@ DataChannels.prototype.handleSelectedEndpointEvent = function (userResource) {
 
 DataChannels.prototype.handlePinnedEndpointEvent = function (userResource) {
     logger.log('pinned endpoint changed: ', userResource);
-    if (this._dataChannels && this._dataChannels.length != 0) {
+    if (this._dataChannels && this._dataChannels.length !== 0) {
         this._dataChannels.some(function (dataChannel) {
             if (dataChannel.readyState == 'open') {
                 dataChannel.send(JSON.stringify({
                     'colibriClass': 'PinnedEndpointChangedEvent',
                     'pinnedEndpoint':
-                        (!userResource || userResource == null)?
-                            null : userResource
+                        userResource ? userResource : null
                 }));
 
                 return true;
diff --git a/modules/RTC/RTCUtils.js b/modules/RTC/RTCUtils.js
index e6c6672ef..f47ff68e4 100644
--- a/modules/RTC/RTCUtils.js
+++ b/modules/RTC/RTCUtils.js
@@ -33,9 +33,10 @@ function getPreviousResolution(resolution) {
     var order = Resolutions[resolution].order;
     var res = null;
     var resName = null;
-    for(var i in Resolutions) {
-        var tmp = Resolutions[i];
-        if(res == null || (res.order < tmp.order && tmp.order < order)) {
+    var tmp, i;
+    for(i in Resolutions) {
+        tmp = Resolutions[i];
+        if (!res || (res.order < tmp.order && tmp.order < order)) {
             resName = i;
             res = tmp;
         }
@@ -678,7 +679,7 @@ var RTCUtils = {
                 error.name == "OverconstrainedError") &&
             (error.constraintName == "minWidth" || error.constraintName == "maxWidth" ||
                 error.constraintName == "minHeight" || error.constraintName == "maxHeight")
-            && resolution != null) {
+            && resolution) {
             self.getUserMediaWithConstraints(['audio', 'video'],
                 function (stream) {
                     var streams = self.successCallback(stream, resolution);
diff --git a/modules/connectionquality/connectionquality.js b/modules/connectionquality/connectionquality.js
index e1832a531..c1ddb14b8 100644
--- a/modules/connectionquality/connectionquality.js
+++ b/modules/connectionquality/connectionquality.js
@@ -108,7 +108,7 @@ var ConnectionQuality = {
     updateLocalStats: function (data) {
         stats = data;
         eventEmitter.emit(CQEvents.LOCALSTATS_UPDATED, 100 - stats.packetLoss.total, stats);
-        if (sendIntervalId == null) {
+        if (!sendIntervalId) {
             startSendingStats();
         }
     },
@@ -119,7 +119,7 @@ var ConnectionQuality = {
      * @param data the statistics
      */
     updateRemoteStats: function (jid, data) {
-        if (data == null || data.packetLoss_total == null) {
+        if (!data || !data.packetLoss_total) {
             eventEmitter.emit(CQEvents.REMOTESTATS_UPDATED, jid, null, null);
             return;
         }
diff --git a/modules/xmpp/JingleSessionPC.js b/modules/xmpp/JingleSessionPC.js
index 2c20d10d9..c5e18ae15 100644
--- a/modules/xmpp/JingleSessionPC.js
+++ b/modules/xmpp/JingleSessionPC.js
@@ -843,7 +843,7 @@ JingleSessionPC.prototype.addSource = function (elem, fromJid) {
                 return this.getAttribute('ssrc');
             }).get();
 
-            if (ssrcs.length != 0) {
+            if (ssrcs.length) {
                 lines += 'a=ssrc-group:' + semantics + ' ' + ssrcs.join(' ') + '\r\n';
             }
         });
@@ -922,7 +922,7 @@ JingleSessionPC.prototype.removeSource = function (elem, fromJid) {
                 return this.getAttribute('ssrc');
             }).get();
 
-            if (ssrcs.length != 0) {
+            if (ssrcs.length) {
                 lines += 'a=ssrc-group:' + semantics + ' ' + ssrcs.join(' ') + '\r\n';
             }
         });
@@ -1367,7 +1367,7 @@ JingleSessionPC.prototype.setLocalDescription = function () {
     var session = transform.parse(this.peerconnection.localDescription.sdp);
     session.media.forEach(function (media) {
 
-        if (media.ssrcs != null && media.ssrcs.length > 0) {
+        if (media.ssrcs && media.ssrcs.length > 0) {
             // TODO(gp) maybe exclude FID streams?
             media.ssrcs.forEach(function (ssrc) {
                 if (ssrc.attribute !== 'cname') {
diff --git a/modules/xmpp/SDP.js b/modules/xmpp/SDP.js
index da68346b1..e5e70f052 100644
--- a/modules/xmpp/SDP.js
+++ b/modules/xmpp/SDP.js
@@ -47,7 +47,7 @@ SDP.prototype.getMediaSsrcMap = function() {
         tmp.forEach(function(line){
             var semantics = line.substr(0, idx).substr(13);
             var ssrcs = line.substr(14 + semantics.length).split(' ');
-            if (ssrcs.length != 0) {
+            if (ssrcs.length) {
                 media.ssrcGroups.push({
                     semantics: semantics,
                     ssrcs: ssrcs
@@ -268,7 +268,7 @@ SDP.prototype.toJingle = function (elem, thecreator, ssrcs) {
                     idx = line.indexOf(' ');
                     var semantics = line.substr(0, idx).substr(13);
                     var ssrcs = line.substr(14 + semantics.length).split(' ');
-                    if (ssrcs.length != 0) {
+                    if (ssrcs.length) {
                         elem.c('ssrc-group', { semantics: semantics, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' });
                         ssrcs.forEach(function(ssrc) {
                             elem.c('source', { ssrc: ssrc })
@@ -599,7 +599,7 @@ SDP.prototype.jingle2media = function (content) {
             return this.getAttribute('ssrc');
         }).get();
 
-        if (ssrcs.length != 0) {
+        if (ssrcs.length) {
             media += 'a=ssrc-group:' + semantics + ' ' + ssrcs.join(' ') + '\r\n';
         }
     });
diff --git a/modules/xmpp/SDPDiffer.js b/modules/xmpp/SDPDiffer.js
index ff4341e39..38d52150a 100644
--- a/modules/xmpp/SDPDiffer.js
+++ b/modules/xmpp/SDPDiffer.js
@@ -143,7 +143,7 @@ SDPDiffer.prototype.toJingle = function(modify) {
 
         // generate source groups from lines
         media.ssrcGroups.forEach(function(ssrcGroup) {
-            if (ssrcGroup.ssrcs.length != 0) {
+            if (ssrcGroup.ssrcs.length) {
 
                 modify.c('ssrc-group', {
                     semantics: ssrcGroup.semantics,
diff --git a/modules/xmpp/TraceablePeerConnection.js b/modules/xmpp/TraceablePeerConnection.js
index 9b579d19f..171d1a975 100644
--- a/modules/xmpp/TraceablePeerConnection.js
+++ b/modules/xmpp/TraceablePeerConnection.js
@@ -182,7 +182,7 @@ var normalizePlanB = function(desc) {
                 for (i = 0; i<mLine.ssrcs.length; i++){
                     if (typeof mLine.ssrcs[i] === 'object'
                         && typeof mLine.ssrcs[i].id !== 'undefined'
-                        && $.inArray(mLine.ssrcs[i].id, firstSsrcs) == 0) {
+                        && !$.inArray(mLine.ssrcs[i].id, firstSsrcs)) {
                         newSsrcLines.push(mLine.ssrcs[i]);
                         delete mLine.ssrcs[i];
                     }