What is a TSX file?

TSX file is commonly associated with TypeScript files that contain React code. TypeScript is a superset of JavaScript that adds static typing to the language, and React is a JavaScript library for building user interfaces. When working with React and TypeScript together, developers often use the “.tsx” extension for their files to indicate that they contain both TypeScript and JSX (React’s syntax extension for JavaScript).

TSX File Example

TypeScript allows you to define types for your variables, function parameters and more. You’ll often see TypeScript code in a “.tsx” file specifying the types of props, state and other variables used in React components.

// Example: TypeScript code in a React component
interface MyComponentProps {
  name: string;
  age: number;
}

const MyComponent: React.FC<MyComponentProps> = ({ name, age }) => {
  // Component logic here
  return <div>{name} is {age} years old.</div>;
};

JSX (React Syntax Extension)

JSX is a syntax extension for JavaScript recommended by React. It looks similar to XML/HTML and is used to describe what the UI should look like.

// Example: JSX in a React component
const MyComponent: React.FC<MyComponentProps> = ({ name, age }) => {
  return <div>{name} is {age} years old.</div>;
};

The “.tsx” file will typically contain the definition of a React component using functional components or class components.

// Example: React component definition in a ".tsx" file
const MyComponent: React.FC = () => {
  return <div>Hello, React!</div>;
};

You’ll often see import statements at the beginning of the file, bringing in necessary dependencies and modules.

// Example: Import statements in a ".tsx" file
import React from 'react';

How to open a TSX file?

TSX files are plain text files so you can open them in any text editor e.g. Notepad. However, these are coding files and meant to be opened by IDE e.g. Visual Studio Code.