React Native. What happens to the JavaScript layer after being built into production?

Question

React

After building the application, what happens to the JS layer? Does it remain or is it being replaced with native code?

Answer 1

JS code remains - it is launched by a separate thread without blocking the main one (UI rendering). Well, then you communicate with native components through JSX - everything is very similar to working with the DOM (after all, with the exception of refs, react encapsulates working with the DOM tree)