Question 1

What is a native module in React Native?

Accepted Answer

A native module is a piece of code written in native language (Objective-C/Swift for iOS, Java/Kotlin for Android) that exposes functionalities to JavaScript code. This allows accessing native APIs not directly available in React Native, such as biometric sensors or Bluetooth.

Question 2

What is the role of the bridge in React Native's traditional architecture?

Accepted Answer

The bridge is the communication mechanism between the JavaScript thread and native threads in the traditional architecture. It serializes data to JSON to transfer it asynchronously between both environments. This asynchronous communication can create latency for frequent operations.

Question 3

How to expose a native method to JavaScript on iOS with the old architecture?

Accepted Answer

On iOS with the old architecture, you need to create a class that inherits from NSObject and implements the RCTBridgeModule protocol. The RCT_EXPORT_MODULE() macro registers the module, and RCT_EXPORT_METHOD() exposes each method to JavaScript. These macros generate the necessary bridging code.

Native Modules & Bridge

What is a native module in React Native?

Câu trả lời

What is the role of the bridge in React Native's traditional architecture?

Câu trả lời

How to expose a native method to JavaScript on iOS with the old architecture?

Câu trả lời

Which annotation to use to expose a native method on Android with the old architecture?

What is JSI (JavaScript Interface) in React Native's new architecture?

Các chủ đề phỏng vấn React Native khác

JavaScript Essentials

React Fundamentals

React Native Basics

React Hooks

TypeScript for React & React Native

React Native Components & API

React Native Styling & Layout

React Native Navigation

React Native State Management

React Native Networking & API

Data Persistence

Forms & Validation

React Native Animations

Platform-Specific Code

Permissions & Device APIs

Push Notifications

React Native Testing

React Native Debugging

Build & Deployment

Expo vs React Native Bare

Performance Optimization

Memory Management

Architecture Patterns

React Native New Architecture

Security Best Practices

Offline-First Architecture

React Native CI/CD

Monorepo & Code Sharing

Advanced Topics

App Lifecycle & Background Execution

Authentication & Session Management

Monitoring & Crash Reporting

Nắm vững React Native cho lần phỏng vấn tiếp theo