[Intro]

[Background Music: Upbeat and friendly tone]

Instructor:

"Hi there, and welcome back! In this video, we’ll dive deeper into one of the most important parts of React: JSX.

By the end of this lesson, you’ll understand:

• What JSX is and how it works under the hood.
• How to embed JavaScript expressions in JSX to make your UI dynamic.
• Key rules of JSX, like wrapping elements in a parent tag and using className instead of class.
• How to return multiple elements using React fragments.

This session will unlock the full potential of JSX, so let’s get started!"

1. What is JSX, and How Does It Work?

Instructor:

"JSX, or JavaScript XML, is a syntax extension for JavaScript. It allows you to write HTML-like code directly in your JavaScript files.

Why Use JSX?

Before JSX, creating elements in React looked like this:

const element = React.createElement('h1', null, 'Hello, world!');

With JSX, the same element can be written as:

const element = <h1>Hello, world!</h1>;

This simplicity is why JSX is the default choice for defining React components.