@babel/preset-react

What is @babel/preset-react?

The @babel/preset-react npm package is a Babel preset that can be used to transform JSX into standard JavaScript. It is commonly used in React applications to allow developers to write JSX, which is a syntax extension for JavaScript that looks similar to HTML. This preset includes the necessary Babel plugins to parse and transform JSX syntax.

What are @babel/preset-react's main functionalities?

Transform JSX

Converts JSX syntax into createElement calls which are understood by React.

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

Support for React Fragments

Allows the use of React Fragments to group a list of children without adding extra nodes to the DOM.

const element = <><div>Item 1</div><div>Item 2</div></>;

Support for JSX Spread Attributes

Enables the spreading of attributes in JSX elements from an object.

const props = { firstName: 'John', lastName: 'Doe' }; const element = <div {...props} />;

Support for JSX Expression Containers

Allows embedding expressions in JSX by wrapping them in curly braces.

const name = 'world'; const element = <div>Hello, {name}!</div>;

Other packages similar to @babel/preset-react

babel-preset-react-app

This package is similar to @babel/preset-react but is specifically tailored for Create React App projects. It includes additional Babel plugins and configurations suitable for the React scripts bundled with Create React App.

babel-preset-react-hmre

This preset is designed for hot module replacement in React applications during development. It is not a direct alternative to @babel/preset-react but offers additional functionality for a specific development workflow.

README

@babel/preset-react

Babel preset for all React plugins.

See our website @babel/preset-react for more information or the issues associated with this package.

Install

Using npm:

npm install --save-dev @babel/preset-react

or using yarn:

yarn add @babel/preset-react --dev

Changelog

v7.25.9 (2024-10-22)

:bug: Bug Fix

• babel-parser, babel-template, babel-types
  • #16905 fix: Keep type annotations in syntacticPlaceholders mode (@liuxingbaoyu)
• babel-helper-compilation-targets, babel-preset-env
  • #16907 fix: support BROWSERSLIST{,_CONFIG} env (@JLHwung)
• Other
  • #16884 Analyze ClassAccessorProperty to prevent the no-undef rule (@victorenator)

:house: Internal

• babel-helper-transform-fixture-test-runner
  • #16914 remove test options flaky (@JLHwung)

:running_woman: Performance

• babel-parser, babel-types
  • #16918 perf: Make VISITOR_KEYS etc. faster to access (@liuxingbaoyu)