backend.js
function Dispatcher(req, res, next) {
            _classCallCheck(this, Dispatcher);

            this.req = req;
            this.res = res;
            this.next = next;
         }
function Dispatcher(req, res, next) {
            _classCallCheck(this, Dispatcher);

            this.req = req;
            this.res = res;
            this.next = next;
         }
function Dispatcher ( req , res , next ) { _classCallCheck ( this , Dispatcher ) ; this . req = req ; this . res = res ; this . next = next ; }
constructor - description

@param  {type} req  description
@param  {type} res  description
@param  {type} next description
@return {type}      description
constructor - description