ReactJS will be great for the web, but React Native not much effective for creating the views and constructing the screen layouts. Whereas NativeScript UI definition follows XML syntax which is so easy to follow and it allows ES5, TypeScript for the logic of the application.
React Native uses Virtual DOM to update ReactJS User Interface. It calculates the modifications in the background thread and keeps the User Interface thread as same like before if no changes made. This process makes very responsive UI. But, If the component makes a lot of calls to the native realm, then the app will be slow.
NativeScript Runs JavaScript on the User Interface thread which provides 100% high performance of native platform APIs through JavaScript. Regards,
John, React JS Trainer@ courseing.com/learn/reactjs-online-training