Updated 3 December 2024
In this blog, we will explore the key differences between JSX vs TSX in React Native and understand when to use each.
“JSX vs TSX in React Native” are syntax extensions used to build UI components in React Native. JSX uses JavaScript, while TSX integrates TypeScript, adding type safety and enhancing code reliability.
JSX is a JavaScript syntax extension that enables HTML-like code within JavaScript, enhancing UI readability. It’s fundamental in React and React Native to combine UI with logic.
TSX is like JSX but allows for TypeScript’s type-checking in React Native. This provides better error detection and ensures type-safe code for building robust, scalable mobile components.
JSX: Does not enforce any type of checking. It’s purely JavaScript, so you won’t get compile-time errors if you pass incorrect data types.
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import React from 'react'; import { Text, View } from 'react-native'; const Greeting = ({ name }) => { return <Text>Hello, {name}!</Text>; }; export default function App() { return ( <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}> <Greeting name={123} /> {/* No type-checking, "123" allowed even if it’s not a string */} </View> ); } |
At runtime, this code shows an error.
This React Native code accepts any value for the name
prop in Greeting
, allowing non-strings like 123
without compile-time errors, potentially causing runtime issues.
TSX: Enforces type safety, requiring you to define the type of each prop. This helps catch errors during compile time.
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import React from 'react'; import { Text, View } from 'react-native'; type GreetingProps = { name: string; }; const Greeting: React.FC<GreetingProps> = ({ name }) => { return <Text>Hello, {name}!</Text>; }; export default function App() { return ( <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}> <Greeting name="John" /> {/* Only accepts strings as defined by GreetingProps */} </View> ); } |
This code shows an error at compile time.
Language Type
JSX: Written in JavaScript, allowing flexibility in data types without type restrictions. It enables quick development but without the safety of enforced types.
TSX: Written in TypeScript, with strict type-checking that enforces the use of specified data types. This improves code reliability and prevents incorrect data types.
JSX: Without type-checking, large projects can become difficult to maintain as they grow, especially when tracking prop types and component structures.
TSX: Type annotations make the codebase easier to maintain, as they provide clear expectations for data types, improving readability and making refactoring simpler.
JSX is best for simple JavaScript projects in React Native, while TSX provides type safety for complex apps. Choose based on your project’s needs and desired code reliability.
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