The RAD Server (formerly EMS) platform is evolving to be a better backend for JavaScript applications, including of course those built with Ext JS. In the 10.2.2 release we improved support for returning JSON data based on the result of database queries, as covered inhttp://blog.marcocantu.com/blog/2017-december-dataset-mapping-json.html. In RAD Studio 10.2.3, we have added to RAD Server the…