Added additional checks to channel sorting that sorts by display_name

web/react/components/navbar_dropdown.jsx

@@ -11,16 +11,24 @@ var AboutBuildModal = require('./about_build_modal.jsx');
 var Constants = require('../utils/constants.jsx');
 
 function getStateFromStores() {
-    let teams = [];
+    const teams = [];
-    let teamsObject = UserStore.getTeams();
+    const teamsObject = UserStore.getTeams();
-    for (let teamId in teamsObject) {
+    for (const teamId in teamsObject) {
         if (teamsObject.hasOwnProperty(teamId)) {
             teams.push(teamsObject[teamId]);
         }
     }
-    teams.sort(function sortByDisplayName(teamA, teamB) {
+    teams.sort((teamA, teamB) => {
-        let teamADisplayName = teamA.display_name.toLowerCase();
+        let teamADisplayName = '';
-        let teamBDisplayName = teamB.display_name.toLowerCase();
+        let teamBDisplayName = '';
+
+        if (teamA && teamA.display_name) {
+            teamADisplayName = teamA.display_name.toLowerCase();
+        }
+        if (teamB && teamB.display_name) {
+            teamBDisplayName = teamB.display_name.toLowerCase();
+        }
+
         if (teamADisplayName < teamBDisplayName) {
             return -1;
         } else if (teamADisplayName > teamBDisplayName) {

web/react/stores/channel_store.jsx

@@ -183,11 +183,21 @@ class ChannelStoreClass extends EventEmitter {
             channels.push(channel);
         }
 
-        channels.sort(function chanSort(a, b) {
+        channels.sort((a, b) => {
-            if (a.display_name.toLowerCase() < b.display_name.toLowerCase()) {
+            let channelADisplayName = '';
+            let channelBDisplayName = '';
+
+            if (a && a.display_name) {
+                channelADisplayName = a.display_name.toLowerCase();
+            }
+            if (b && b.display_name) {
+                channelBDisplayName = b.display_name.toLowerCase();
+            }
+
+            if (channelADisplayName < channelBDisplayName) {
                 return -1;
             }
-            if (a.display_name.toLowerCase() > b.display_name.toLowerCase()) {
+            if (channelADisplayName > channelBDisplayName) {
                 return 1;
             }
             return 0;