React Fundamentals
JSX, components, props, state, events, conditional rendering, lists & keys
1What is JSX in React?
What is JSX in React?
Antwort
JSX is a syntactic extension of JavaScript that allows writing HTML-like code directly within JavaScript. It gets transpiled into React.createElement() function calls by tools like Babel. JSX makes the code more readable and facilitates UI creation by combining logic and rendering in the same file.
2How to include a JavaScript expression in JSX?
How to include a JavaScript expression in JSX?
Antwort
JavaScript expressions are included in JSX by wrapping them in single curly braces. For example, to display a variable name, write {name}. This syntax allows injecting dynamic values, calling functions, or evaluating expressions directly in the component rendering.
3What is the main difference between a functional component and a class component in React?
What is the main difference between a functional component and a class component in React?
Antwort
A functional component is a simple JavaScript function that returns JSX, while a class component extends React.Component and uses a render() method. Since the introduction of Hooks in React 16.8, functional components can handle state and side effects, making class components less necessary in modern projects.
What is a prop in React?
What is state in React and how does it differ from props?
+17 Interview-Fragen
Weitere React Native-Interviewthemen
JavaScript Essentials
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
Native Modules & Bridge
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
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