ES6 for JitsiTrackEvents

.jshintrc

     "asi": false, // true: Tolerate Automatic Semicolon Insertion (no semicolons)
     "browser": true, // Web Browser (window, document, etc)
     "curly": false, // true: Require {} for every new block or scope
+    "esversion": 6,
     "evil": true, // true: Tolerate use of `eval` and `new Function()`
     "expr": true, // true: Tolerate `ExpressionStatement` as Programs
     "indent": 4, // {int} Number of spaces to use for indentation

JitsiConference.js

 var JitsiParticipant = require("./JitsiParticipant");
 var Statistics = require("./modules/statistics/statistics");
 var JitsiDTMFManager = require('./modules/DTMF/JitsiDTMFManager');
-var JitsiTrackEvents = require("./JitsiTrackEvents");
+import * as JitsiTrackEvents from "./JitsiTrackEvents";
 var JitsiTrackErrors = require("./JitsiTrackErrors");
 var JitsiTrackError = require("./JitsiTrackError");
 var Settings = require("./modules/settings/Settings");

JitsiMeetJS.js

 var JitsiMediaDevicesEvents = require('./JitsiMediaDevicesEvents');
 var JitsiConnectionErrors = require("./JitsiConnectionErrors");
 var JitsiConferenceErrors = require("./JitsiConferenceErrors");
-var JitsiTrackEvents = require("./JitsiTrackEvents");
+import * as JitsiTrackEvents from "./JitsiTrackEvents";
 var JitsiTrackErrors = require("./JitsiTrackErrors");
 var JitsiTrackError = require("./JitsiTrackError");
 var JitsiRecorderErrors = require("./JitsiRecorderErrors");

JitsiTrackEvents.js

-var JitsiTrackEvents = {
-    /**
-     * A media track mute status was changed.
-     */
-    TRACK_MUTE_CHANGED: "track.trackMuteChanged",
-    /**
-     * Audio levels of a this track was changed.
-     */
-    TRACK_AUDIO_LEVEL_CHANGED: "track.audioLevelsChanged",
-    /**
-     * The media track was removed to the conference.
-     */
-    LOCAL_TRACK_STOPPED: "track.stopped",
-    /**
-     * The video type("camera" or "desktop") of the track was changed.
-     */
-    TRACK_VIDEOTYPE_CHANGED: "track.videoTypeChanged",
-    /**
-     * The audio output of the track was changed.
-     */
-    TRACK_AUDIO_OUTPUT_CHANGED: "track.audioOutputChanged",
-    /**
-     * Detects that no audio have been sent.
-     */
-    TRACK_AUDIO_NOT_WORKING: "track.audioNotWorking"
-};
-
-module.exports = JitsiTrackEvents;
+/**
+ * The media track was removed to the conference.
+ */
+export const LOCAL_TRACK_STOPPED = "track.stopped";
+/**
+ * Audio levels of a this track was changed.
+ */
+export const TRACK_AUDIO_LEVEL_CHANGED = "track.audioLevelsChanged";
+/**
+ * Detects that no audio have been sent.
+ */
+export const TRACK_AUDIO_NOT_WORKING = "track.audioNotWorking";
+/**
+ * The audio output of the track was changed.
+ */
+export const TRACK_AUDIO_OUTPUT_CHANGED = "track.audioOutputChanged";
+/**
+ * A media track mute status was changed.
+ */
+export const TRACK_MUTE_CHANGED = "track.trackMuteChanged";
+/**
+ * The video type("camera" or "desktop") of the track was changed.
+ */
+export const TRACK_VIDEOTYPE_CHANGED = "track.videoTypeChanged";

modules/RTC/JitsiLocalTrack.js

 var logger = require("jitsi-meet-logger").getLogger(__filename);
 var JitsiTrack = require("./JitsiTrack");
 var RTCBrowserType = require("./RTCBrowserType");
-var JitsiTrackEvents = require('../../JitsiTrackEvents');
+import * as JitsiTrackEvents from "../../JitsiTrackEvents";
 var JitsiTrackErrors = require("../../JitsiTrackErrors");
 var JitsiTrackError = require("../../JitsiTrackError");
 var RTCEvents = require("../../service/RTC/RTCEvents");

modules/RTC/JitsiRemoteTrack.js

 var JitsiTrack = require("./JitsiTrack");
-var JitsiTrackEvents = require("../../JitsiTrackEvents");
+import * as JitsiTrackEvents from "../../JitsiTrackEvents";
 var RTCBrowserType = require("./RTCBrowserType");
 var Statistics = require("../statistics/statistics");
 var AdapterJS = require("./adapter.screenshare");

modules/RTC/JitsiTrack.js

 var RTCBrowserType = require("./RTCBrowserType");
 var RTCEvents = require("../../service/RTC/RTCEvents");
 var RTCUtils = require("./RTCUtils");
-var JitsiTrackEvents = require("../../JitsiTrackEvents");
+import * as JitsiTrackEvents from "../../JitsiTrackEvents";
 var EventEmitter = require("events");
 var MediaType = require("../../service/RTC/MediaType");