Flow, coding style

react/features/app/middleware.js

+// @flow
+
 import { SET_ROOM } from '../base/conference';
 import {
     CONNECTION_ESTABLISHED,

react/features/base/connection/actions.native.js

-/* @flow */
+// @flow
 
 import _ from 'lodash';
 import type { Dispatch } from 'redux';
         const state = getState();
         const { conference, joining } = state['features/base/conference'];
 
-        // The conference we are joining or have already joined.
+        // The conference we have already joined or are joining.
         const conference_ = conference || joining;
 
         // Promise which completes when the conference has been left and the
         // Disconnect the connection.
         const { connecting, connection } = state['features/base/connection'];
 
-        // The connection we are connecting or have already connected.
+        // The connection we have already connected or are connecting.
         const connection_ = connection || connecting;
 
         if (connection_) {

react/features/base/jwt/middleware.js

     const result = next(action);
 
     const { locationURL } = getState()['features/base/connection'];
-    let jwt;
 
-    if (locationURL) {
-        jwt = parseJWTFromURLParams(locationURL);
-    }
-    dispatch(setJWT(jwt));
+    dispatch(
+        setJWT(locationURL ? parseJWTFromURLParams(locationURL) : undefined));
 
     return result;
 }