In most samples DHTMLX Widgets are loaded through NPM that provides limited (GPL) version of components. For production you should use the PRO version.

There are also samples where DHTMLX Widgets are loaded from CDN. cdn.dhtmlx.com serves limited (GPL) version of components. For production use your own CDN / file server.

To run the app in the development mode, run npm start in the project directory. Open http://localhost:3000 to view it in the browser.