JSX (JavaScript XML) is a syntax extension for JavaScript that allows you to write HTML-like code in your JavaScript files. It is commonly used in React to define the structure and content of components.
Here’s an example of a JSX element:
const element = <h1>Hello, world!</h1>;
In this example, we’re defining a variable called element that contains a JSX element. The element looks like HTML, with a <h1> tag and some text inside it. However, it’s actually JavaScript code that is being transformed into function calls by a transpiler like Babel.
Here’s another example that shows how to use JSX to define a React component:
import React from 'react';
function Greeting(props) {
return <h1>Hello, {props.name}!</h1>;
}
export default Greeting;
In this example, we’re defining a component called Greeting that takes a name prop and uses it to render a personalized greeting. The JSX code in the return statement looks like HTML, but it’s actually JavaScript code that is being transformed into function calls by the transpiler.
Overall, JSX provides a powerful way to define the structure and content of React components in a familiar and easy-to-use syntax. It allows you to write code that looks like HTML, but that is actually JavaScript, which can be executed and updated in real-time by the React runtime.
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