Maison  >  Article  >  interface Web  >  JSX (JavaScript XML)

JSX (JavaScript XML)

Mary-Kate Olsen
Mary-Kate Olsenoriginal
2024-09-27 22:44:03267parcourir

JSX (JavaScript XML)

JSX (JavaScript XML) is a syntax extension for JavaScript commonly used with React to describe what the user interface should look like. It looks similar to HTML but works within JavaScript. JSX allows you to write HTML elements directly in JavaScript and place them in the DOM. It makes React components easier to write and understand by visually resembling HTML.
Example of JSX:

function Welcome(props) {
  return <h1>Hello, {props.name}!</h1>;
}

const element = <Welcome name="John" />;

In this example:

  • Welcome is a functional component that takes props as an argument.
  • The element is a JSX expression that passes the name "John" to the Welcome component.

JSX is then compiled into regular JavaScript calls to React.createElement() during the build process. Here's how JSX might be compiled:

React.createElement(Welcome, { name: "John" });

It simplifies the creation of React components and boosts readability, allowing developers to work with UI layouts more intuitively.

Ce qui précède est le contenu détaillé de. pour plus d'informations, suivez d'autres articles connexes sur le site Web de PHP en chinois!

Déclaration:
Le contenu de cet article est volontairement contribué par les internautes et les droits d'auteur appartiennent à l'auteur original. Ce site n'assume aucune responsabilité légale correspondante. Si vous trouvez un contenu suspecté de plagiat ou de contrefaçon, veuillez contacter admin@php.cn