React Native

Advanced Topics

Code splitting, lazy loading, multi-threading, worklets, custom native views

22 питань зі співбесід·
Senior
1

What is the main advantage of code splitting in a React Native application?

Відповідь

Code splitting reduces the initial bundle size by loading only the code needed at startup. Other modules are loaded on demand, which significantly improves application launch time. This is particularly beneficial for large applications with many features.

2

How to implement lazy loading of a component with React.lazy in React Native?

Відповідь

React.lazy allows dynamically loading a component by wrapping it with a function that returns a dynamic import. The component must then be wrapped in a Suspense with a fallback to handle the loading state. This approach defers loading heavy components until they are actually needed.

3

What is a worklet in the context of React Native Reanimated?

Відповідь

A worklet is a JavaScript function executed on the native UI thread rather than the main JavaScript thread. This enables smooth 60fps animations because animation calculations are not blocked by other JavaScript operations. Worklets are identified by the 'worklet' directive at the beginning of the function.

4

In React Native, on which main threads does the application run?

5

What is the difference between useSharedValue and useState for animations with Reanimated?

+19 питань зі співбесід

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