Why use jsx file extension. tsx: This file extension is used for TypeScript files. This difference primarily revolves around the presence of JSX, a syntax extension that allows you to write HTML-like code within your JavaScript. But a directory named components will include components anyway. js when creating a new app with create-next-app? In this article, we will discuss why jsx is not allowed in files with the . js or . Oct 13, 2020 · JSX, or JavaScript XML, is a syntax extension for JavaScript that allows you to write HTML-like code in your JavaScript files. It was initially created by Facebook for use with the React library. Writing Markup with JSX JSX is a syntax extension for JavaScript that lets you write HTML-like markup inside a JavaScript file. Aug 12, 2025 · The . jsx is reserved for React components that contain JSX syntax. Sep 12, 2017 · Typically, you would use . JSX allows us to write HTML elements in JavaScript and place them in the DOM without any createElement() and/or appendChild() methods. jsx file extension, except it supports TypeScript features. If if it's pure JavaScript file, then you should use the . One such format is the JSX file extension, which has multiple uses and corresponding programs for opening and using such files. Jun 18, 2025 · JSX, which stands for JavaScript XML, is an XML-like extension to JavaScript language syntax. It resembles HTML, making it more Jan 22, 2024 · To use the . g. 3) . js file extension. JSX allows us to write HTML in React. This article will focus on the features of the JSX realm, its applications Mar 14, 2024 · Why don't we use the . The preserve mode will keep the JSX as part of the output to be further consumed by another transform step (e. While you don’t have to use JSX when writing React (or use React in order to try JSX), there’s no denying it is an important part of the React ecosystem, so let’s dive in and see what’s going on under the hood. tsx extension. This documentation explores why JSX is an integral part of React, covering its benefits, integration with JavaScript, performance optimization, and comparison with other templating languages. It allows writing code that look similar html, and that similarity makes it feel pretty natural in the context of a front end UI library. JSX is a syntax extension for JavaScript that lets you write HTML-like markup inside a JavaScript file. tsx extension What is jsx? jsx is a syntax extension for JavaScript that allows you to write HTML-like code inside of JavaScript. tsx adds static typing and type checking. jsx file extension. Feb 12, 2025 · Press enter or click to view image in full size JSX (JavaScript XML) is a powerful syntax extension for JavaScript that allows developers to write HTML-like code within their React applications . Although JSX looks like regular HTML, it’s actually a syntax extension for JavaScript. Open JSX File In the world of computers and programming, file formats play a significant role in determining the usability and compatibility of a file across various platforms and applications. JSX makes it easier to write and add HTML in React. In this comprehensive guide, we‘ll cover everything you […] Aug 31, 2023 · JSX is an extension to javascript syntax. jsx. tsx file extensions is crucial. Babel). I realize there are no hard rules, but I thought you are supposed to use the jsx extension when the file actually has jsx in it (most React apps have jsx components, no?). js extension. Jan 7, 2019 · JSX makes it so we can pass around tree structures composed of HTML or React elements as if they were standard JavaScript values. Oct 11, 2024 · It’s a syntax extension that allows you to write HTML-like code inside your JavaScript files. It allows you to write React components using both JSX syntax and TypeScript features. jsx file extensions helps keep the codebase organized. Why Use JSX? JSX stands for JavaScript XML. tsx? TypeScript’s type system Why jsx is not allowed in files with the . Jan 28, 2024 · JSX, or JavaScript XML, is a syntax extension for JavaScript that allows you to write HTML-like code within your JavaScript files. Additionally the output will have a . Reasons why React uses JSX: Readability and Expressiveness: JSX provides a more concise and readable syntax for defining React elements in comparison to using plain JavaScript. At first glance, it may seem odd or unnecessary. Jul 29, 2022 · Instead of making a breaking change and requiring all projects to migrate to the new syntax, the TypeScript team chose instead to add a new file extension: . With JSX, you can write HTML-like code directly in your JavaScript files. This made using JSX entirely opt-in as well as aligned with the similar . tsx. Technically, both can work for your React components because JSX is compiled into standard JavaScript. We will cover the following topics: What is jsx? What is . While it looks similar to HTML, there are some key differences. createElement, does not need to go through a JSX transformation before use, and the output will have a . jsx files for defining React components that contain JSX syntax. This broad rule makes total sense to me so I'm wondering why almost no one follows it. ts and . If it is a service class or utility file with pure JS function, then . This allows you to write HTML-like markup directly in your JavaScript code, making it easier to describe the structure and appearance of your components. Let's delve into when to employ each extension and why maintaining this separation contributes to a cleaner In a React project, you’ll often see files with the extension . It allows developers to write HTML-like markup directly inside their JavaScript code. It’s used with React to describe what the UI should look like. This makes it easier to build user interfaces in React. Instead of using traditional JavaScript functions to create UI elements, you can write code that looks similar to HTML. JSX is very commonly used with React, though technically you could do react without JSX (it would be combersome, so i don't recommend it), and the JSX syntax can be used with other libraries than react (this isn't Jul 23, 2025 · React uses JSX (JavaScript XML) as a syntax extension for JavaScript. JSX is a syntax extension that looks similar to XML or HTML but is designed to work seamlessly with JavaScript. It is a syntax extension for JavaScript. Aug 13, 2025 · JSX stands for JavaScript XML, and it is a special syntax used in React to simplify building user interfaces. Jan 12, 2025 · JSX is a syntax extension for JavaScript that allows you to write HTML-like code in your React components. It may be clearer to put the JSX-Extension on files that include JSX (Pages, Components) and use JS otherwise. jsx extension file in your project you will need JavaScript transcompilers like Babel for compiling JSX into React. This makes it easier to write code that Jun 27, 2024 · TSX is a file extension that signifies a TypeScript file containing JSX code. The . js should be fine. Oct 1, 2025 · Learn all about JSX (JavaScript XML), a syntax extension for JavaScript that allows developers to write HTML-like code inside a JavaScript file. tsx file extension works just like . It's purely for convention. JSX converts HTML tags into react elements. js extension is typically used for general JavaScript files, such as utility functions and configuration settings, while . But once you start using JSX, you‘ll quickly realize why it has become an integral part of working with React. jsx file extension used by non-TypeScript React projects. js and . jsx file name extension instead of . Instead of separating your markup and logic, JSX allows you to combine them, which simplifies Jun 4, 2023 · If the file contains JSX code, it should probably be labeled as such. Sep 9, 2025 · JSX stands for JavaScript XML. You are allowed to mix the two. Example: Oct 5, 2024 · Introduction In the realm of React development with TypeScript, understanding the distinction between . The react mode will emit React. JSX allows you to write HTML-like code directly inside JavaScript, enabling you to create UI components more efficiently. Example: Aug 31, 2023 · JSX is an extension to javascript syntax. Although there are other ways to write components, most React developers prefer the conciseness of JSX, and most codebases use it. Both allow JSX syntax, but . Jul 23, 2025 · In React, the use of . drl 2vx4tv isukm ydxba prxbp 1x2mawz htyg m1p av 3ak8sc