Now, here’s where the special nature of React comes in. Besides normal HTML, CSS, and JavaScript, the bulk of your React code will be written in JSX.

React components are created through JavaScript variables that use a createClass method to render HTML that presents data supplied in the form of properties ("props") or state, depending on whether ...

The newly supported JSX transform, which is featured in the React 17 JavaScript UI library, both improves the JSX transform API and allows automatic importing of the JSX runtime library.