React is a JavaScript library for building user interfaces. React is used to build single-page applications. React allows us to create reusable UI components. Our "Show React" tool makes it easy to demonstrate React. It shows both the code and the result.

If you use a build tool or a framework, consult its documentation to learn how to add a CSS file to your project. Displaying data JSX lets you put markup into JavaScript. Curly braces let you “escape back” into JavaScript so that you can embed some variable from your code and display it to the user. For example, this will display user.name:

React is a popular JavaScript library developed by Facebook for building user interfaces. The Visual Studio Code editor supports React.js IntelliSense and code navigation out of the box. …

Apr 8, 2025 · Reactis a JavaScript Library known for front-end development (or user interface). It is popular due to its component-based architecture, Single Page Applications (SPAs), and Virtual DOM for building web applications that are fast, efficient, and scalable.

Start by including three scripts, the first two let us write React code in our JavaScripts, and the third, Babel, allows us to write JSX syntax and ES6 in older browsers.

6 days ago · React utilizes features of modern JavaScript for many of its patterns. Its biggest departure from JavaScript comes with the use of JSX syntax. JSX extends JavaScript's syntax so that HTML-like code can live alongside it. For example: This heading constant is known as a JSX expression. React can use it to render that <h1> tag in our app.

React lets you combine your markup, CSS, and JavaScript into custom “components”, reusable UI elements for your app. The table of contents code you saw above could be turned into a <TableOfContents /> component you could render on every page.

Nov 20, 2019 · React (also known as React.js) is one of the most popular JavaScript front end development libraries. Here is a collection of React syntax and usage that you can use as a handy guide or reference.

Rsbuild includes built-in support for React features like fast refresh, JSX, TypeScript, and styling. See Rsbuild’s React guide to get started. If you’re starting from scratch with React Native you’ll need to use Metro, the JavaScript bundler for React Native.

Oct 10, 2024 · This article contains a wide collection of React JS examples. These examples are categorized based on the topics, including components, props, hooks, and advanced topics in React. Many of these program examples contain multiple approaches to solve the …