diff --git a/packages/rocketchat-lib/client/lib/openRoom.coffee b/packages/rocketchat-lib/client/lib/openRoom.coffee
deleted file mode 100644
index af932dfc5aa..00000000000
--- a/packages/rocketchat-lib/client/lib/openRoom.coffee
+++ /dev/null
@@ -1,79 +0,0 @@
-currentTracker = undefined
-
-@openRoom = (type, name) ->
-	Session.set 'openedRoom', null
-
-	Meteor.defer ->
-		currentTracker = Tracker.autorun (c) ->
-			if RoomManager.open(type + name).ready() isnt true
-				BlazeLayout.render 'main', { modal: RocketChat.Layout.isEmbedded(), center: 'loading' }
-				return
-
-			user = Meteor.user()
-			unless user?.username
-				return
-
-			currentTracker = undefined
-			c.stop()
-
-			room = RocketChat.roomTypes.findRoom(type, name, user)
-			if not room?
-				if type is 'd'
-					Meteor.call 'createDirectMessage', name, (err) ->
-						if !err
-							RoomManager.close(type + name)
-							openRoom('d', name)
-						else
-							Session.set 'roomNotFound', {type: type, name: name}
-							BlazeLayout.render 'main', {center: 'roomNotFound'}
-							return
-				else
-					Meteor.call 'getRoomByTypeAndName', type, name, (err, record) ->
-						if err?
-							Session.set 'roomNotFound', {type: type, name: name}
-							BlazeLayout.render 'main', {center: 'roomNotFound'}
-						else
-							delete record.$loki
-							RocketChat.models.Rooms.upsert({ _id: record._id }, _.omit(record, '_id'))
-							RoomManager.close(type + name)
-							openRoom(type, name)
-
-				return
-
-			mainNode = document.querySelector('.main-content')
-			if mainNode?
-				for child in mainNode.children
-					mainNode.removeChild child if child?
-				roomDom = RoomManager.getDomOfRoom(type + name, room._id)
-				mainNode.appendChild roomDom
-				if roomDom.classList.contains('room-container')
-					roomDom.querySelector('.messages-box > .wrapper').scrollTop = roomDom.oldScrollTop
-
-			Session.set 'openedRoom', room._id
-
-			fireGlobalEvent 'room-opened', _.omit room, 'usernames'
-
-			Session.set 'editRoomTitle', false
-			RoomManager.updateMentionsMarksOfRoom type + name
-			Meteor.setTimeout ->
-				readMessage.readNow()
-			, 2000
-			# KonchatNotification.removeRoomNotification(params._id)
-
-			if Meteor.Device.isDesktop() and window.chatMessages?[room._id]?
-				setTimeout ->
-					$('.message-form .input-message').focus()
-				, 100
-
-			# update user's room subscription
-			sub = ChatSubscription.findOne({rid: room._id})
-			if sub?.open is false
-				Meteor.call 'openRoom', room._id, (err) ->
-					if err
-						return handleError(err)
-
-			if FlowRouter.getQueryParam('msg')
-				msg = { _id: FlowRouter.getQueryParam('msg'), rid: room._id }
-				RoomHistoryManager.getSurroundingMessages(msg);
-
-			RocketChat.callbacks.run 'enter-room', sub
diff --git a/packages/rocketchat-lib/client/lib/openRoom.js b/packages/rocketchat-lib/client/lib/openRoom.js
new file mode 100644
index 00000000000..7224887c27d
--- /dev/null
+++ b/packages/rocketchat-lib/client/lib/openRoom.js
@@ -0,0 +1,102 @@
+/* globals fireGlobalEvent readMessage*/
+const openRoom = function(type, name) {
+	Session.set('openedRoom', null);
+	Meteor.defer(function() {
+		Tracker.autorun(function(c) {
+			if (RoomManager.open(type + name).ready() !== true) {
+				return BlazeLayout.render('main', {
+					modal: RocketChat.Layout.isEmbedded(),
+					center: 'loading'
+				});
+			}
+			const user = Meteor.user();
+			if (!(user != null && user.username)) {
+				return;
+			}
+			c.stop();
+			const room = RocketChat.roomTypes.findRoom(type, name, user);
+			if (room == null) {
+				if (type === 'd') {
+					Meteor.call('createDirectMessage', name, function(err) {
+						if (!err) {
+							RoomManager.close(type + name);
+							return openRoom('d', name);
+						} else {
+							Session.set('roomNotFound', {
+								type,
+								name
+							});
+							BlazeLayout.render('main', {
+								center: 'roomNotFound'
+							});
+						}
+					});
+				} else {
+					Meteor.call('getRoomByTypeAndName', type, name, function(err, record) {
+						if (err != null) {
+							Session.set('roomNotFound', {
+								type,
+								name
+							});
+							return BlazeLayout.render('main', {
+								center: 'roomNotFound'
+							});
+						} else {
+							delete record.$loki;
+							RocketChat.models.Rooms.upsert({
+								_id: record._id
+							}, _.omit(record, '_id'));
+							RoomManager.close(type + name);
+							return openRoom(type, name);
+						}
+					});
+				}
+				return;
+			}
+			const mainNode = document.querySelector('.main-content');
+			if (mainNode != null) {
+				[...((mainNode && mainNode.children) || [])].forEach(child => {
+					mainNode.removeChild(child);
+				});
+				const roomDom = RoomManager.getDomOfRoom(type + name, room._id);
+				mainNode.appendChild(roomDom);
+				if (roomDom.classList.contains('room-container')) {
+					roomDom.querySelector('.messages-box > .wrapper').scrollTop = roomDom.oldScrollTop;
+				}
+			}
+			Session.set('openedRoom', room._id);
+			fireGlobalEvent('room-opened', _.omit(room, 'usernames'));
+			Session.set('editRoomTitle', false);
+			RoomManager.updateMentionsMarksOfRoom(type + name);
+
+			Meteor.setTimeout(() => {
+				readMessage.readNow();
+			}, 2000);
+
+			if (Meteor.Device.isDesktop() && window.chatMessages && window.chatMessages[room._id] != null) {
+				setTimeout(() => {
+					return $('.message-form .input-message').focus();
+				}, 100);
+			}
+			const sub = ChatSubscription.findOne({
+				rid: room._id
+			});
+			if (sub && sub.open === false) {
+				Meteor.call('openRoom', room._id, function(err) {
+					if (err) {
+						return handleError(err);
+					}
+				});
+			}
+			if (FlowRouter.getQueryParam('msg')) {
+				const msg = {
+					_id: FlowRouter.getQueryParam('msg'),
+					rid: room._id
+				};
+				RoomHistoryManager.getSurroundingMessages(msg);
+			}
+			return RocketChat.callbacks.run('enter-room', sub);
+		});
+	});
+};
+this.openRoom = openRoom;
diff --git a/packages/rocketchat-lib/client/lib/roomTypes.coffee b/packages/rocketchat-lib/client/lib/roomTypes.coffee
deleted file mode 100644
index 424636cd38a..00000000000
--- a/packages/rocketchat-lib/client/lib/roomTypes.coffee
+++ /dev/null
@@ -1,87 +0,0 @@
-RocketChat.roomTypes = new class roomTypesClient extends roomTypesCommon
-	checkCondition: (roomType) ->
-		return not roomType.condition? or roomType.condition()
-
-	getTypes: ->
-		orderedTypes = []
-
-		_.sortBy(@roomTypesOrder, 'order').forEach (type) =>
-			orderedTypes.push @roomTypes[type.identifier]
-
-		return orderedTypes
-
-	getIcon: (roomType) ->
-		return @roomTypes[roomType]?.icon
-
-	getRoomName: (roomType, roomData) ->
-		return @roomTypes[roomType]?.roomName roomData
-
-	getIdentifiers: (except) ->
-		except = [].concat except
-		list = _.reject @roomTypesOrder, (t) -> return except.indexOf(t.identifier) isnt -1
-		return _.map list, (t) -> return t.identifier
-
-	getUserStatus: (roomType, roomId) ->
-		return @roomTypes[roomType]?.getUserStatus?(roomId)
-
-	findRoom: (roomType, identifier, user) ->
-		return @roomTypes[roomType]?.findRoom identifier, user
-
-	canSendMessage: (roomId) ->
-		return ChatSubscription.find({ rid: roomId }).count() > 0
-
-	readOnly: (roomId, user) ->
-
-		fields = { ro: 1 }
-
-		# if a user has been specified then we want to see if that user has been muted in the room
-		if user
-			fields.muted = 1
-
-		room = ChatRoom.findOne({ _id: roomId }, fields : fields)
-
-		unless user
-			return room?.ro;
-
-		userOwner = RoomRoles.findOne({ rid: roomId, "u._id": user._id, roles: 'owner' }, { fields: { _id: 1 } })
-
-		return room?.ro is true and Array.isArray(room?.muted) and room?.muted.indexOf(user.username) != -1 and !userOwner
-
-	archived: (roomId) ->
-		fields = { archived: 1 }
-
-		room = ChatRoom.findOne({ _id: roomId }, fields : fields)
-
-		return room?.archived is true
-
-	verifyCanSendMessage: (roomId) ->
-		room = ChatRoom.findOne({ _id: roomId }, { fields: { t: 1 } })
-		return if not room?.t?
-
-		roomType = room.t
-
-		return @roomTypes[roomType]?.canSendMessage roomId if @roomTypes[roomType]?.canSendMessage?
-
-		return @canSendMessage roomId
-
-	verifyShowJoinLink: (roomId) ->
-		room = ChatRoom.findOne({ _id: roomId }, { fields: { t: 1 } })
-		return if not room?.t?
-
-		roomType = room.t
-
-		if not @roomTypes[roomType]?.showJoinLink?
-			return false
-
-		return @roomTypes[roomType].showJoinLink roomId
-
-	getNotSubscribedTpl: (roomId) ->
-		room = ChatRoom.findOne({ _id: roomId }, { fields: { t: 1 } })
-		return if not room?.t?
-
-		roomType = room.t
-
-		if not @roomTypes[roomType]?.notSubscribedTpl?
-			return false
-
-		return @roomTypes[roomType].notSubscribedTpl
diff --git a/packages/rocketchat-lib/client/lib/roomTypes.js b/packages/rocketchat-lib/client/lib/roomTypes.js
new file mode 100644
index 00000000000..dec8c462888
--- /dev/null
+++ b/packages/rocketchat-lib/client/lib/roomTypes.js
@@ -0,0 +1,124 @@
+import roomTypesCommon from '../../lib/roomTypesCommon';
+
+RocketChat.roomTypes = new class extends roomTypesCommon {
+	checkCondition(roomType) {
+		return (roomType.condition == null) || roomType.condition();
+	}
+	getTypes() {
+		return _.sortBy(this.roomTypesOrder, 'order').map((type) => this.roomTypes[type.identifier]);
+	}
+	getIcon(roomType) {
+		return this.roomTypes[roomType] && this.roomTypes[roomType].icon;
+	}
+	getRoomName(roomType, roomData) {
+		return this.roomTypes[roomType] && this.roomTypes[roomType].roomName && this.roomTypes[roomType].roomName(roomData);
+	}
+	getIdentifiers(e) {
+		const except = [].concat(e);
+		const list = _.reject(this.roomTypesOrder, (t) => except.indexOf(t.identifier) !== -1);
+		return _.map(list, (t) => t.identifier);
+	}
+	getUserStatus(roomType, roomId) {
+		this.roomTypes[roomType] && typeof this.roomTypes[roomType].getUserStatus === 'function' && this.roomTypes[roomType].getUserStatus(roomId);
+	}
+	findRoom(roomType, identifier, user) {
+		return this.roomTypes[roomType] && this.roomTypes[roomType].findRoom(identifier, user);
+	}
+	canSendMessage(roomId) {
+		return ChatSubscription.find({
+			rid: roomId
+		}).count() > 0;
+	}
+	readOnly(roomId, user) {
+		const fields = {
+			ro: 1
+		};
+		if (user) {
+			fields.muted = 1;
+		}
+		const room = ChatRoom.findOne({
+			_id: roomId
+		}, {
+			fields
+		});
+		if (!user) {
+			return room && room.ro;
+		}
+		/* globals RoomRoles */
+		const userOwner = RoomRoles.findOne({
+			rid: roomId,
+			'u._id': user._id,
+			roles: 'owner'
+		}, {
+			fields: {
+				_id: 1
+			}
+		});
+		return room && (room.ro === true && Array.isArray(room.muted) && room.muted.indexOf(user.username) !== -1 && !userOwner);
+	}
+	archived(roomId) {
+		const fields = {
+			archived: 1
+		};
+		const room = ChatRoom.findOne({
+			_id: roomId
+		}, {
+			fields
+		});
+		return room && room.archived === true;
+	}
+	verifyCanSendMessage(roomId) {
+		const room = ChatRoom.findOne({
+			_id: roomId
+		}, {
+			fields: {
+				t: 1
+			}
+		});
+
+		if (room && !room.t) {
+			return;
+		}
+
+		const roomType = room.t;
+		if (this.roomTypes[roomType] && this.roomTypes[roomType].canSendMessage) {
+			return this.roomTypes[roomType].canSendMessage(roomId);
+		}
+		return this.canSendMessage(roomId);
+	}
+	verifyShowJoinLink(roomId) {
+		const room = ChatRoom.findOne({
+			_id: roomId
+		}, {
+			fields: {
+				t: 1
+			}
+		});
+		if (room && !room.t) {
+			return;
+		}
+		const roomType = room.t;
+		if (this.roomTypes[roomType] && !this.roomTypes[roomType].showJoinLink) {
+			return false;
+		}
+		return this.roomTypes[roomType].showJoinLink(roomId);
+	}
+	getNotSubscribedTpl(roomId) {
+		const room = ChatRoom.findOne({
+			_id: roomId
+		}, {
+			fields: {
+				t: 1
+			}
+		});
+		if (room && !room.t) {
+			return;
+		}
+		const roomType = room.t;
+		if (this.roomTypes[roomType] && !this.roomTypes[roomType].notSubscribedTpl) {
+			return false;
+		}
+		return this.roomTypes[roomType].notSubscribedTpl;
+	}
+
+};
diff --git a/packages/rocketchat-lib/lib/callbacks.coffee b/packages/rocketchat-lib/lib/callbacks.coffee
deleted file mode 100644
index d0e3feb8ff3..00000000000
--- a/packages/rocketchat-lib/lib/callbacks.coffee
+++ /dev/null
@@ -1,129 +0,0 @@
-# https://github.com/TelescopeJS/Telescope/blob/master/packages/telescope-lib/lib/callbacks.js
-
-###
-# Callback hooks provide an easy way to add extra steps to common operations.
-# @namespace RocketChat.callbacks
-###
-RocketChat.callbacks = {}
-
-if Meteor.isServer
-	RocketChat.callbacks.showTime = true
-	RocketChat.callbacks.showTotalTime = true
-else
-	RocketChat.callbacks.showTime = false
-	RocketChat.callbacks.showTotalTime = false
-
-###
-# Callback priorities
-###
-RocketChat.callbacks.priority =
-	HIGH: -1000
-	MEDIUM: 0
-	LOW: 1000
-
-###
-# Add a callback function to a hook
-# @param {String} hook - The name of the hook
-# @param {Function} callback - The callback function
-###
-RocketChat.callbacks.add = (hook, callback, priority, id) ->
-	# if callback array doesn't exist yet, initialize it
-	priority ?= RocketChat.callbacks.priority.MEDIUM
-	unless _.isNumber priority
-		priority = RocketChat.callbacks.priority.MEDIUM
-	callback.priority = priority
-	callback.id = id or Random.id()
-	RocketChat.callbacks[hook] ?= []
-
-	if RocketChat.callbacks.showTime is true
-		err = new Error
-		callback.stack = err.stack
-
-		# if not id?
-		# 	console.log('Callback without id', callback.stack)
-
-	# Avoid adding the same callback twice
-	for cb in RocketChat.callbacks[hook]
-		if cb.id is callback.id
-			return
-
-	RocketChat.callbacks[hook].push callback
-	return
-
-###
-# Remove a callback from a hook
-# @param {string} hook - The name of the hook
-# @param {string} id - The callback's id
-###
-
-RocketChat.callbacks.remove = (hookName, id) ->
-	RocketChat.callbacks[hookName] = _.reject RocketChat.callbacks[hookName], (callback) ->
-		callback.id is id
-	return
-
-###
-# Successively run all of a hook's callbacks on an item
-# @param {String} hook - The name of the hook
-# @param {Object} item - The post, comment, modifier, etc. on which to run the callbacks
-# @param {Object} [constant] - An optional constant that will be passed along to each callback
-# @returns {Object} Returns the item after it's been through all the callbacks for this hook
-###
-
-RocketChat.callbacks.run = (hook, item, constant) ->
-	callbacks = RocketChat.callbacks[hook]
-	if !!callbacks?.length
-		if RocketChat.callbacks.showTotalTime is true
-			totalTime = 0
-
-		# if the hook exists, and contains callbacks to run
-		result = _.sortBy(callbacks, (callback) -> return callback.priority or RocketChat.callbacks.priority.MEDIUM).reduce (result, callback) ->
-			# console.log(callback.name);
-			if RocketChat.callbacks.showTime is true or RocketChat.callbacks.showTotalTime is true
-				time = Date.now()
-
-			callbackResult = callback result, constant
-
-			if RocketChat.callbacks.showTime is true or RocketChat.callbacks.showTotalTime is true
-				currentTime = Date.now() - time
-				totalTime += currentTime
-				if RocketChat.callbacks.showTime is true
-					if Meteor.isServer
-						RocketChat.statsTracker.timing('callbacks.time', currentTime, ["hook:#{hook}", "callback:#{callback.id}"]);
-					else
-						console.log String(currentTime), hook, callback.id, callback.stack?.split?('\n')[2]?.match(/\(.+\)/)?[0]
-
-			return if typeof callbackResult == 'undefined' then result else callbackResult
-		, item
-
-		if RocketChat.callbacks.showTotalTime is true
-			if Meteor.isServer
-				RocketChat.statsTracker.timing('callbacks.totalTime', totalTime, ["hook:#{hook}"]);
-			else
-				console.log hook+':', totalTime
-
-		return result
-	else
-		# else, just return the item unchanged
-		return item
-
-###
-# Successively run all of a hook's callbacks on an item, in async mode (only works on server)
-# @param {String} hook - The name of the hook
-# @param {Object} item - The post, comment, modifier, etc. on which to run the callbacks
-# @param {Object} [constant] - An optional constant that will be passed along to each callback
-###
-
-RocketChat.callbacks.runAsync = (hook, item, constant) ->
-	callbacks = RocketChat.callbacks[hook]
-	if Meteor.isServer and !!callbacks?.length
-		# use defer to avoid holding up client
-		Meteor.defer ->
-			# run all post submit server callbacks on post object successively
-			_.sortBy(callbacks, (callback) -> return callback.priority or RocketChat.callbacks.priority.MEDIUM).forEach (callback) ->
-				# console.log(callback.name);
-				callback item, constant
-				return
-			return
-	else
-		return item
-	return
diff --git a/packages/rocketchat-lib/lib/callbacks.js b/packages/rocketchat-lib/lib/callbacks.js
new file mode 100644
index 00000000000..511523f1e40
--- /dev/null
+++ b/packages/rocketchat-lib/lib/callbacks.js
@@ -0,0 +1,131 @@
+/*
+* Callback hooks provide an easy way to add extra steps to common operations.
+* @namespace RocketChat.callbacks
+*/
+
+RocketChat.callbacks = {};
+
+if (Meteor.isServer) {
+	RocketChat.callbacks.showTime = true;
+	RocketChat.callbacks.showTotalTime = true;
+} else {
+	RocketChat.callbacks.showTime = false;
+	RocketChat.callbacks.showTotalTime = false;
+}
+
+
+/*
+* Callback priorities
+*/
+
+RocketChat.callbacks.priority = {
+	HIGH: -1000,
+	MEDIUM: 0,
+	LOW: 1000
+};
+
+
+/*
+* Add a callback function to a hook
+* @param {String} hook - The name of the hook
+* @param {Function} callback - The callback function
+*/
+
+RocketChat.callbacks.add = function(hook, callback, priority, id) {
+	if (priority == null) {
+		priority = RocketChat.callbacks.priority.MEDIUM;
+	}
+	if (!_.isNumber(priority)) {
+		priority = RocketChat.callbacks.priority.MEDIUM;
+	}
+	callback.priority = priority;
+	callback.id = id || Random.id();
+	RocketChat.callbacks[hook] = RocketChat.callbacks[hook] || [];
+	if (RocketChat.callbacks.showTime === true) {
+		const err = new Error;
+		callback.stack = err.stack;
+	}
+	if (RocketChat.callbacks[hook].find((cb) => cb.id === callback.id)) {
+		return;
+	}
+	RocketChat.callbacks[hook].push(callback);
+};
+
+
+/*
+* Remove a callback from a hook
+* @param {string} hook - The name of the hook
+* @param {string} id - The callback's id
+*/
+
+RocketChat.callbacks.remove = function(hookName, id) {
+	RocketChat.callbacks[hookName] = _.reject(RocketChat.callbacks[hookName], (callback) => callback.id === id);
+};
+
+
+/*
+* Successively run all of a hook's callbacks on an item
+* @param {String} hook - The name of the hook
+* @param {Object} item - The post, comment, modifier, etc. on which to run the callbacks
+* @param {Object} [constant] - An optional constant that will be passed along to each callback
+* @returns {Object} Returns the item after it's been through all the callbacks for this hook
+*/
+
+RocketChat.callbacks.run = function(hook, item, constant) {
+	const callbacks = RocketChat.callbacks[hook];
+	if (!callbacks && callbacks.length) {
+		let totalTime = 0;
+		const result = _.sortBy(callbacks, function(callback) {
+			return callback.priority || RocketChat.callbacks.priority.MEDIUM;
+		}).reduce(function(result, callback) {
+			let time = 0;
+			if (RocketChat.callbacks.showTime === true || RocketChat.callbacks.showTotalTime === true) {
+				time = Date.now();
+			}
+			const callbackResult = callback(result, constant);
+			if (RocketChat.callbacks.showTime === true || RocketChat.callbacks.showTotalTime === true) {
+				const currentTime = Date.now() - time;
+				totalTime += currentTime;
+				if (RocketChat.callbacks.showTime === true) {
+					if (Meteor.isServer) {
+						RocketChat.statsTracker.timing('callbacks.time', currentTime, [`hook:${ hook }`, `callback:${ callback.id }`]);
+					} else {
+						let stack = callback.stack && typeof callback.stack.split === 'function' && callback.stack.split('\n');
+						stack = stack && stack[2] && (stack[2].match(/\(.+\)/)||[])[0];
+						console.log(String(currentTime), hook, callback.id, stack);
+					}
+				}
+			}
+			return (typeof callbackResult === 'undefined') ? result : callbackResult;
+		}, item);
+		if (RocketChat.callbacks.showTotalTime === true) {
+			if (Meteor.isServer) {
+				RocketChat.statsTracker.timing('callbacks.totalTime', totalTime, [`hook:${ hook }`]);
+			} else {
+				console.log(`${ hook }:`, totalTime);
+			}
+		}
+		return result;
+	} else {
+		return item;
+	}
+};
+
+
+/*
+* Successively run all of a hook's callbacks on an item, in async mode (only works on server)
+* @param {String} hook - The name of the hook
+* @param {Object} item - The post, comment, modifier, etc. on which to run the callbacks
+* @param {Object} [constant] - An optional constant that will be passed along to each callback
+*/
+
+RocketChat.callbacks.runAsync = function(hook, item, constant) {
+	const callbacks = RocketChat.callbacks[hook];
+	if (Meteor.isServer && callbacks && callbacks.length) {
+		Meteor.defer(function() {
+			_.sortBy(callbacks, (callback) => callback.priority || RocketChat.callbacks.priority.MEDIUM).forEach((callback) => callback(item, constant));
+		});
+	} else {
+		return item;
+	}
+};
diff --git a/packages/rocketchat-lib/lib/promises.coffee b/packages/rocketchat-lib/lib/promises.coffee
deleted file mode 100644
index a23ab907b73..00000000000
--- a/packages/rocketchat-lib/lib/promises.coffee
+++ /dev/null
@@ -1,93 +0,0 @@
-# https://github.com/TelescopeJS/Telescope/blob/master/packages/telescope-lib/lib/callbacks.js
-
-###
-# Callback hooks provide an easy way to add extra steps to common operations.
-# @namespace RocketChat.promises
-###
-RocketChat.promises = {}
-
-###
-# Callback priorities
-###
-RocketChat.promises.priority =
-	HIGH: -1000
-	MEDIUM: 0
-	LOW: 1000
-
-###
-# Add a callback function to a hook
-# @param {String} hook - The name of the hook
-# @param {Function} callback - The callback function
-###
-
-RocketChat.promises.add = (hook, callback, priority, id) ->
-	# if callback array doesn't exist yet, initialize it
-	priority ?= RocketChat.promises.priority.MEDIUM
-	unless _.isNumber priority
-		priority = RocketChat.promises.priority.MEDIUM
-	callback.priority = priority
-	callback.id = id or Random.id()
-	RocketChat.promises[hook] ?= []
-
-	# Avoid adding the same callback twice
-	for cb in RocketChat.promises[hook]
-		if cb.id is callback.id
-			return
-
-	RocketChat.promises[hook].push callback
-	return
-
-###
-# Remove a callback from a hook
-# @param {string} hook - The name of the hook
-# @param {string} id - The callback's id
-###
-
-RocketChat.promises.remove = (hookName, id) ->
-	RocketChat.promises[hookName] = _.reject RocketChat.promises[hookName], (callback) ->
-		callback.id is id
-	return
-
-###
-# Successively run all of a hook's callbacks on an item
-# @param {String} hook - The name of the hook
-# @param {Object} item - The post, comment, modifier, etc. on which to run the callbacks
-# @param {Object} [constant] - An optional constant that will be passed along to each callback
-# @returns {Object} Returns the item after it's been through all the callbacks for this hook
-###
-
-RocketChat.promises.run = (hook, item, constant) ->
-	callbacks = RocketChat.promises[hook]
-	if !!callbacks?.length
-		# if the hook exists, and contains callbacks to run
-		callbacks = _.sortBy(callbacks, (callback) -> return callback.priority or RocketChat.promises.priority.MEDIUM)
-		return callbacks.reduce (previousPromise, callback) ->
-			return new Promise (resolve, reject) ->
-				previousPromise.then (result) ->
-					callback(result, constant).then(resolve, reject)
-		, Promise.resolve(item)
-	else
-		# else, just return the item unchanged
-		return Promise.resolve(item)
-
-###
-# Successively run all of a hook's callbacks on an item, in async mode (only works on server)
-# @param {String} hook - The name of the hook
-# @param {Object} item - The post, comment, modifier, etc. on which to run the callbacks
-# @param {Object} [constant] - An optional constant that will be passed along to each callback
-###
-
-RocketChat.promises.runAsync = (hook, item, constant) ->
-	callbacks = RocketChat.promises[hook]
-	if Meteor.isServer and !!callbacks?.length
-		# use defer to avoid holding up client
-		Meteor.defer ->
-			# run all post submit server callbacks on post object successively
-			_.sortBy(callbacks, (callback) -> return callback.priority or RocketChat.promises.priority.MEDIUM).forEach (callback) ->
-				# console.log(callback.name);
-				callback item, constant
-				return
-			return
-	else
-		return item
-	return
diff --git a/packages/rocketchat-lib/lib/promises.js b/packages/rocketchat-lib/lib/promises.js
new file mode 100644
index 00000000000..1e040f172bc
--- /dev/null
+++ b/packages/rocketchat-lib/lib/promises.js
@@ -0,0 +1,89 @@
+
+/*
+* Callback hooks provide an easy way to add extra steps to common operations.
+* @namespace RocketChat.promises
+*/
+
+RocketChat.promises = {};
+
+
+/*
+* Callback priorities
+*/
+
+RocketChat.promises.priority = {
+	HIGH: -1000,
+	MEDIUM: 0,
+	LOW: 1000
+};
+
+
+/*
+* Add a callback function to a hook
+* @param {String} hook - The name of the hook
+* @param {Function} callback - The callback function
+*/
+
+RocketChat.promises.add = function(hook, callback, p = RocketChat.promises.priority.MEDIUM, id) {
+	const priority = !_.isNumber(p) ? RocketChat.promises.priority.MEDIUM : p;
+	callback.priority = priority;
+	callback.id = id || Random.id();
+	RocketChat.promises[hook] = RocketChat.promises[hook] || [];
+	if (RocketChat.promises[hook].find(cb => cb.id === callback.id)) {
+		return;
+	}
+	RocketChat.promises[hook].push(callback);
+};
+
+
+/*
+* Remove a callback from a hook
+* @param {string} hook - The name of the hook
+* @param {string} id - The callback's id
+*/
+
+RocketChat.promises.remove = function(hookName, id) {
+	RocketChat.promises[hookName] = _.reject(RocketChat.promises[hookName], (callback) => callback.id === id);
+};
+
+
+/*
+* Successively run all of a hook's callbacks on an item
+* @param {String} hook - The name of the hook
+* @param {Object} item - The post, comment, modifier, etc. on which to run the callbacks
+* @param {Object} [constant] - An optional constant that will be passed along to each callback
+* @returns {Object} Returns the item after it's been through all the callbacks for this hook
+*/
+
+RocketChat.promises.run = function(hook, item, constant) {
+	let callbacks = RocketChat.promises[hook];
+	if (callbacks == null || callbacks.length === 0) {
+		return Promise.resolve(item);
+	}
+	callbacks = _.sortBy(callbacks, (callback) => callback.priority || RocketChat.promises.priority.MEDIUM);
+	return callbacks.reduce(function(previousPromise, callback) {
+		return new Promise(function(resolve, reject) {
+			return previousPromise.then((result) => callback(result, constant).then(resolve, reject));
+		});
+	}, Promise.resolve(item));
+};
+
+
+/*
+* Successively run all of a hook's callbacks on an item, in async mode (only works on server)
+* @param {String} hook - The name of the hook
+* @param {Object} item - The post, comment, modifier, etc. on which to run the callbacks
+* @param {Object} [constant] - An optional constant that will be passed along to each callback
+*/
+
+RocketChat.promises.runAsync = function(hook, item, constant) {
+	const callbacks = RocketChat.promises[hook];
+	if (!Meteor.isServer || callbacks == null || callbacks.length === 0) {
+		return item;
+	}
+	Meteor.defer(() => {
+		_.sortBy(callbacks, (callback) => callback.priority || RocketChat.promises.priority.MEDIUM).forEach(function(callback) {
+			callback(item, constant);
+		});
+	});
+};
diff --git a/packages/rocketchat-lib/lib/roomTypesCommon.coffee b/packages/rocketchat-lib/lib/roomTypesCommon.coffee
deleted file mode 100644
index a351dc25892..00000000000
--- a/packages/rocketchat-lib/lib/roomTypesCommon.coffee
+++ /dev/null
@@ -1,75 +0,0 @@
-class @roomTypesCommon
-	roomTypes: {}
-	roomTypesOrder: []
-	mainOrder: 1
-
-	### Adds a room type to app
-	@param identifier An identifier to the room type. If a real room, MUST BE the same of `db.rocketchat_room.t` field, if not, can be null
-	@param order Order number of the type
-	@param config
-		template: template name to render on sideNav
-		icon: icon class
-		route:
-			name: route name
-			action: route action function
-	###
-	add: (identifier, order, config) ->
-		unless identifier?
-			identifier = Random.id()
-
-		if @roomTypes[identifier]?
-			return false
-
-		if not order?
-			order = @mainOrder + 10
-			@mainOrder += 10
-
-		# @TODO validate config options
-		@roomTypesOrder.push
-			identifier: identifier
-			order: order
-		@roomTypes[identifier] = config
-
-		if config.route?.path? and config.route?.name? and config.route?.action?
-			routeConfig =
-				name: config.route.name
-				action: config.route.action
-
-			if Meteor.isClient
-				routeConfig.triggersExit = [ roomExit ]
-
-			FlowRouter.route config.route.path, routeConfig
-
-	hasCustomLink: (roomType) ->
-		return @roomTypes[roomType]?.route?.link?
-
-	###
-	@param roomType: room type (e.g.: c (for channels), d (for direct channels))
-	@param subData: the user's subscription data
-	###
-	getRouteLink: (roomType, subData) ->
-		unless @roomTypes[roomType]?
-			return false
-
-		routeData = {}
-
-		if @roomTypes[roomType]?.route?.link?
-			routeData = @roomTypes[roomType].route.link(subData)
-		else if subData?.name?
-			routeData = { name: subData.name }
-
-		return FlowRouter.path @roomTypes[roomType].route.name, routeData
-
-	openRouteLink: (roomType, subData, queryParams) ->
-		unless @roomTypes[roomType]?
-			return false
-
-		routeData = {}
-
-		if @roomTypes[roomType]?.route?.link?
-			routeData = @roomTypes[roomType].route.link(subData)
-		else if subData?.name?
-			routeData = { name: subData.name }
-
-		return FlowRouter.go @roomTypes[roomType].route.name, routeData, queryParams
-
diff --git a/packages/rocketchat-lib/lib/roomTypesCommon.js b/packages/rocketchat-lib/lib/roomTypesCommon.js
new file mode 100644
index 00000000000..d7275875d8e
--- /dev/null
+++ b/packages/rocketchat-lib/lib/roomTypesCommon.js
@@ -0,0 +1,83 @@
+/* globals roomExit*/
+this.roomTypesCommon = class {
+	constructor() {
+		this.roomTypes = {};
+		this.roomTypesOrder = [];
+		this.mainOrder = 1;
+	}
+
+	/* Adds a room type to app
+	@param identifier An identifier to the room type. If a real room, MUST BE the same of `db.rocketchat_room.t` field, if not, can be null
+	@param order Order number of the type
+	@param config
+	template: template name to render on sideNav
+	icon: icon class
+	route:
+	name: route name
+	action: route action function
+	*/
+
+	add(identifier = Random.id(), order, config) {
+		if (this.roomTypes[identifier] != null) {
+			return false;
+		}
+		if (order == null) {
+			order = this.mainOrder + 10;
+			this.mainOrder += 10;
+		}
+		this.roomTypesOrder.push({
+			identifier,
+			order
+		});
+		this.roomTypes[identifier] = config;
+		if (config.route && config.route.path && config.route.name && config.route.action) {
+			const routeConfig = {
+				name: config.route.name,
+				action: config.route.action
+			};
+			if (Meteor.isClient) {
+				routeConfig.triggersExit = [roomExit];
+			}
+			return FlowRouter.route(config.route.path, routeConfig);
+		}
+	}
+
+	hasCustomLink(roomType) {
+		return this.roomTypes[roomType] && this.roomTypes[roomType].route && this.roomTypes[roomType].route.link != null;
+	}
+
+	/*
+	@param roomType: room type (e.g.: c (for channels), d (for direct channels))
+	@param subData: the user's subscription data
+	*/
+
+	getRouteLink(roomType, subData) {
+		if (this.roomTypes[roomType] == null) {
+			return false;
+		}
+		let routeData = {};
+		if (this.roomTypes[roomType] && this.roomTypes[roomType].route && this.roomTypes[roomType].route.link) {
+			routeData = this.roomTypes[roomType].route.link(subData);
+		} else if (subData && subData.name) {
+			routeData = {
+				name: subData.name
+			};
+		}
+		return FlowRouter.path(this.roomTypes[roomType].route.name, routeData);
+	}
+
+	openRouteLink(roomType, subData, queryParams) {
+		if (this.roomTypes[roomType] == null) {
+			return false;
+		}
+		let routeData = {};
+		if (this.roomTypes[roomType] && this.roomTypes[roomType].route && this.roomTypes[roomType].route.link) {
+			routeData = this.roomTypes[roomType].route.link(subData);
+		} else if (subData && subData.name) {
+			routeData = {
+				name: subData.name
+			};
+		}
+		return FlowRouter.go(this.roomTypes[roomType].route.name, routeData, queryParams);
+	}
+};
diff --git a/packages/rocketchat-lib/lib/settings.coffee b/packages/rocketchat-lib/lib/settings.coffee
deleted file mode 100644
index cdc221064b3..00000000000
--- a/packages/rocketchat-lib/lib/settings.coffee
+++ /dev/null
@@ -1,83 +0,0 @@
-###
-# RocketChat.settings holds all packages settings
-# @namespace RocketChat.settings
-###
-RocketChat.settings =
-	callbacks: {}
-	regexCallbacks: {}
-	ts: new Date
-
-	get: (_id, callback) ->
-		if callback?
-			RocketChat.settings.onload _id, callback
-			if _id is '*' and Meteor.settings?
-				for key, value of Meteor.settings
-					callback key, value
-				return
-
-			if _.isRegExp(_id)
-				for key, value of Meteor.settings when _id.test(key)
-					callback key, value
-				return
-
-			if Meteor.settings?[_id]?
-				callback _id, Meteor.settings?[_id]
-		else
-			if _.isRegExp(_id)
-				items = []
-				for key, value of Meteor.settings when _id.test(key)
-					items.push
-						key: key
-						value: value
-				return items
-
-			return Meteor.settings?[_id]
-
-	set: (_id, value, callback) ->
-		Meteor.call 'saveSetting', _id, value, callback
-
-	batchSet: (settings, callback) ->
-
-		# async -> sync
-		# http://daemon.co.za/2012/04/simple-async-with-only-underscore/
-
-		save = (setting) ->
-			return (callback) ->
-				Meteor.call 'saveSetting', setting._id, setting.value, setting.editor, callback
-
-		actions = _.map settings, (setting) -> save(setting)
-		_(actions).reduceRight(_.wrap, (err, success) -> return callback err, success)()
-
-	load: (key, value, initialLoad) ->
-		if RocketChat.settings.callbacks[key]?
-			for callback in RocketChat.settings.callbacks[key]
-				callback key, value, initialLoad
-
-		if RocketChat.settings.callbacks['*']?
-			for callback in RocketChat.settings.callbacks['*']
-				callback key, value, initialLoad
-
-		for cbKey, cbValue of RocketChat.settings.regexCallbacks
-			if cbValue.regex.test(key)
-				callback(key, value, initialLoad) for callback in cbValue.callbacks
-
-
-	onload: (key, callback) ->
-		# if key is '*'
-		# 	for key, value in Meteor.settings
-		# 		callback key, value, false
-		# else if Meteor.settings?[_id]?
-		# 	callback key, Meteor.settings[_id], false
-
-		keys = [].concat key
-
-		for k in keys
-			if _.isRegExp k
-				RocketChat.settings.regexCallbacks[k.source] ?= {
-					regex: k
-					callbacks: []
-				}
-				RocketChat.settings.regexCallbacks[k.source].callbacks.push callback
-			else
-				RocketChat.settings.callbacks[k] ?= []
-				RocketChat.settings.callbacks[k].push callback
diff --git a/packages/rocketchat-lib/lib/settings.js b/packages/rocketchat-lib/lib/settings.js
new file mode 100644
index 00000000000..2e5bb09eba0
--- /dev/null
+++ b/packages/rocketchat-lib/lib/settings.js
@@ -0,0 +1,102 @@
+
+/*
+* RocketChat.settings holds all packages settings
+* @namespace RocketChat.settings
+*/
+RocketChat.settings = {
+	callbacks: {},
+	regexCallbacks: {},
+	ts: new Date,
+	get(_id, callback) {
+		if (callback != null) {
+			RocketChat.settings.onload(_id, callback);
+			if (!Meteor.settings) {
+				return;
+			}
+			if (_id === '*') {
+				return Object.keys(Meteor.settings).forEach(key => {
+					const value = Meteor.settings[key];
+					callback(key, value);
+				});
+			}
+			if (_.isRegExp(_id) && Meteor.settings) {
+				return Object.keys(Meteor.settings).forEach(key => {
+					if (!_id.test(key)) {
+						return;
+					}
+					const value = Meteor.settings[key];
+					callback(key, value);
+				});
+			}
+			return Meteor.settings[_id] && callback(_id, Meteor.settings[_id]);
+		} else {
+			if (!Meteor.settings) {
+				return;
+			}
+			if (_.isRegExp(_id)) {
+				return Object.keys(Meteor.settings).reduce((items, key) => {
+					const value = Meteor.settings[key];
+					if (_id.test(key)) {
+						items.push({
+							key,
+							value
+						});
+					}
+					return items;
+				}, []);
+			}
+			return Meteor.settings && Meteor.settings[_id];
+		}
+	},
+	set(_id, value, callback) {
+		return Meteor.call('saveSetting', _id, value, callback);
+	},
+	batchSet(settings, callback) {
+		// async -> sync
+		// http://daemon.co.za/2012/04/simple-async-with-only-underscore/
+		const save = function(setting) {
+			return function(callback) {
+				return Meteor.call('saveSetting', setting._id, setting.value, setting.editor, callback);
+			};
+		};
+		const actions = _.map(settings, (setting) => save(setting));
+		return _(actions).reduceRight(_.wrap, (err, success) => callback(err, success))();
+	},
+	load(key, value, initialLoad) {
+		Object.keys({
+			'*': 1,
+			[key]: 1
+		}).forEach(key => {
+			if (RocketChat.settings.callbacks[key]) {
+				RocketChat.settings.callbacks[key].forEach(callback => callback(key, value, initialLoad));
+			}
+		});
+		Object.keys(RocketChat.settings.regexCallbacks).forEach(cbKey => {
+			const cbValue = RocketChat.settings.regexCallbacks[cbKey];
+			if (!cbValue.regex.test(key)) {
+				return;
+			}
+			cbValue.callbacks.forEach(callback => callback(key, value, initialLoad));
+		});
+	},
+	onload(key, callback) {
+		// if key is '*'
+		// 	for key, value in Meteor.settings
+		// 		callback key, value, false
+		// else if Meteor.settings?[_id]?
+		// 	callback key, Meteor.settings[_id], false
+		const keys = [].concat(key);
+		keys.forEach(k => {
+			if (_.isRegExp(k)) {
+				RocketChat.settings.regexCallbacks[name = k.source] = RocketChat.settings.regexCallbacks[name = k.source] || {
+					regex: k,
+					callbacks: []
+				};
+				RocketChat.settings.regexCallbacks[k.source].callbacks.push(callback);
+			} else {
+				RocketChat.settings.callbacks[k] = RocketChat.settings.callbacks[k] || [];
+				RocketChat.settings.callbacks[k].push(callback);
+			}
+		});
+	}
+};
diff --git a/packages/rocketchat-lib/package.js b/packages/rocketchat-lib/package.js
index 8aea1663f7b..c7b8e96eab9 100644
--- a/packages/rocketchat-lib/package.js
+++ b/packages/rocketchat-lib/package.js
@@ -52,13 +52,13 @@ Package.onUse(function(api) {
 
 	// COMMON LIB
 	api.addFiles('lib/getURL.js');
-	api.addFiles('lib/settings.coffee');
+	api.addFiles('lib/settings.js');
 	api.addFiles('lib/configLogger.js');
-	api.addFiles('lib/callbacks.coffee');
+	api.addFiles('lib/callbacks.js');
 	api.addFiles('lib/fileUploadRestrictions.js');
 	api.addFiles('lib/placeholders.js');
-	api.addFiles('lib/promises.coffee');
-	api.addFiles('lib/roomTypesCommon.coffee');
+	api.addFiles('lib/promises.js');
+	api.addFiles('lib/roomTypesCommon.js');
 	api.addFiles('lib/slashCommand.js');
 	api.addFiles('lib/Message.js');
 	api.addFiles('lib/MessageTypes.js');
@@ -178,10 +178,10 @@ Package.onUse(function(api) {
 	api.addFiles('client/lib/TabBar.js', 'client');
 	api.addFiles('client/lib/RocketChatTabBar.js', 'client');
 	api.addFiles('client/lib/cachedCollection.js', 'client');
-	api.addFiles('client/lib/openRoom.coffee', 'client');
+	api.addFiles('client/lib/openRoom.js', 'client');
 	api.addFiles('client/lib/roomExit.js', 'client');
 	api.addFiles('client/lib/settings.js', 'client');
-	api.addFiles('client/lib/roomTypes.coffee', 'client');
+	api.addFiles('client/lib/roomTypes.js', 'client');
 	api.addFiles('client/lib/userRoles.js', 'client');
 	api.addFiles('client/lib/Layout.js', 'client');