⚛️ React Native Versions & TypeScript

? Quick Overview

React Native evolves rapidly, introducing new features, performance improvements, and tooling updates. Modern React Native projects commonly use TypeScript for type safety, better tooling, and scalable codebases. Understanding versioning and TypeScript integration is essential for professional apps.

? Key Concepts

• React Native versioning strategy
• CLI vs Expo version differences
• TypeScript support in React Native
• Type definitions for components and APIs
• Backward compatibility considerations

? Syntax / Theory

React Native follows semantic versioning (major.minor.patch). Newer versions often include:

• New architecture updates
• Improved Hermes engine support
• Better TypeScript type definitions

TypeScript adds static typing on top of JavaScript using .ts and .tsx files.

? Code Example(s)

// React Native component written in TypeScript
import React from "react";
import { View, Text, StyleSheet } from "react-native";

type Props = {
  title: string;
};

const Header: React.FC<Props> = ({ title }) => {
  return (
    <View style={styles.container}>
      <Text style={styles.text}>{title}</Text>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    padding: 16
  },
  text: {
    fontSize: 20,
    fontWeight: "bold"
  }
});

export default Header;

? Live Output / Explanation

? Interactive Example: Type Simulator

Below is a simulation of how TypeScript validates props in React Native. Try entering invalid values (like adding "px" to a number field) to see how TypeScript catches errors before you run the app.

interface Props {
  padding: number;
  label: string;
}

? Use Cases

• Large-scale React Native applications
• Team-based development
• Long-term maintainable mobile apps
• Enterprise-grade projects