React Native apps are made up of 3 main elements:
You may have heard of a very important concept in React applications, the Virtual DOM. Virtual DOM is a virtual representation of, as its name implies, how components should be displayed in the interface, and how rendering will be performed.
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In web browsers, the virtual DOM is represented through the Document Object Model with HTML elements. The advantage of the virtual DOM being an intermediate layer between the code and the final representation of our application allows us to change the specified representation based on the description of the virtual DOM. Think of the virtual DOM as a textual specification of what the application should look like, say there will be a text input here, a red button there, etc. This specification should then be moved to the platform components where it will be visible. In the case of a web page, this means HTML elements.
For ReactNative development, a connector is implemented that takes a description of the virtual DOM and, based on it, calls the native APIs of the platform, be it iOS or Android, and represents the DOM, taking advantage of the specified native APIs. This means that, for example, when you call a View element in React Native, the connector will see how to cast it to Android and how to cast it to some native iOS API.
If you’re looking for a framework to build a native app, then React Native is the one for you. The main thing is to familiarize yourself in detail with all its features and key characteristics.