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.

In React, there is no special syntax for writing conditions. Instead, you’ll use the same techniques as you use when writing regular JavaScript code. For example, you can use an if statement to conditionally include JSX:

It is called JSX, and it is a syntax extension to JavaScript. We recommend using it with React to describe what the UI should look like. JSX may remind you of a template language, but it comes with the full power of JavaScript. JSX produces React “elements”. We will explore rendering them to the DOM in the next section.

JSX allows us to write HTML elements in JavaScript and place them in the DOM without any createElement() and/or appendChild() methods. JSX converts HTML tags into react elements.

JSX is a syntax extension for JavaScript that lets you write HTML-like markup inside a JavaScript file. Although there are other ways to write components, most React developers prefer the conciseness of JSX, and most codebases use it.

React is a JavaScript library for building user interfaces. This guide targets React v15 to v16. ···. Use this.props to access properties passed to the component. ···. Use states (this.state) to manage dynamic data. state = { username: undefined }; ...

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:

In React, you can conditionally render JSX using JavaScript syntax like if statements, &&, and ? : operators. Let’s say you have a PackingList component rendering several Item s, which can be marked as packed or not: Notice that some of the Item components have their isPacked prop set to true instead of false.

Fundamentally, JSX just provides syntactic sugar for the React.createElement(component, props, ...children) function. The JSX code: Click Me. </MyButton> compiles into: MyButton, {color: 'blue', shadowSize: 2}, 'Click Me' ) You can also use the self-closing form of the tag if there are no children. So: compiles into:

JSX provides a syntax extension for JavaScript that allows you to write HTML-like code directly within JavaScript. JSX offers expressive syntax that simplifies the process of building user interfaces in React applications by combining the strength of …