What is JSX and how does string interpolation work in it?

What is JSX and how does string interpolation work in it?

JSX is a syntax extension for JavaScript that looks similar to XML. It allows you to write HTML-like code within JavaScript. String interpolation in JSX is done using curly braces, allowing you to embed JavaScript expressions directly within your JSX.

Can you give me an example of string interpolation in JSX?

Sure! Here's a simple example:

const name = 'John';
const greeting = <h1>Hello, {name}!</h1>;

In this case, {name} will be replaced with 'John' when rendered.

Are there any limitations to string interpolation in JSX?

Yes, you can only use valid JavaScript expressions within the curly braces. You can't use statements or complex expressions that don't evaluate to a value.

How does JSX get compiled to JavaScript?

JSX is compiled by tools like Babel into regular JavaScript function calls. For example, the JSX <h1>Hello, {name}!</h1> gets transformed into React.createElement('h1', null, 'Hello, ', name).