@babel/preset-typescript

What is @babel/preset-typescript?

The @babel/preset-typescript package is a Babel preset for TypeScript, which allows Babel to parse and transform TypeScript code into JavaScript. This enables developers to use TypeScript's static typing features while leveraging Babel's ability to compile modern JavaScript to be compatible with older browsers or environments.

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

TypeScript Compilation

Compiles TypeScript code to JavaScript by stripping out type annotations and handling TypeScript-specific syntax.

const x: number = 10;

Support for TypeScript Features

Supports various TypeScript features like enums, interfaces, and namespaces, converting them to equivalent JavaScript code.

enum Color { Red, Green, Blue }; let c: Color = Color.Green;

Integration with Babel Toolchain

Easily integrates with the Babel toolchain, allowing TypeScript files to be included in Babel's build process alongside other JavaScript files.

module.exports = { presets: ['@babel/preset-typescript'] };

Other packages similar to @babel/preset-typescript

ts-loader

ts-loader is a TypeScript loader for webpack. It compiles TypeScript to JavaScript before bundling. It differs from @babel/preset-typescript in that it is specifically designed for use with webpack and uses the TypeScript compiler (tsc) directly rather than Babel.

awesome-typescript-loader

Similar to ts-loader, awesome-typescript-loader is another loader for webpack that compiles TypeScript to JavaScript. It offers features like Babel integration and type checking in a separate process. It is an alternative to ts-loader and provides similar functionality to @babel/preset-typescript but with a focus on webpack integration.

typescript

The official TypeScript npm package provides the TypeScript compiler (tsc) which can be used to compile TypeScript files directly without Babel. It is more comprehensive in terms of TypeScript feature support compared to @babel/preset-typescript, which is focused on integrating TypeScript with Babel's ecosystem.

README

@babel/preset-typescript

Babel preset for TypeScript.

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

Install

Using npm:

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

or using yarn:

yarn add @babel/preset-typescript --dev

Changelog

v7.25.7 (2024-10-02)

:bug: Bug Fix

• babel-helper-validator-identifier
  • #16825 fix: update identifier to unicode 16 (@JLHwung)
• babel-traverse
  • #16814 fix: issue with node path keys updated on unrelated paths (@DylanPiercey)
• babel-plugin-transform-classes
  • #16797 Use an inclusion rather than exclusion list for super() check (@nicolo-ribaudo)
• babel-generator
  • #16788 Fix printing of TS infer in compact mode (@nicolo-ribaudo)
  • #16785 Print TS type annotations for destructuring in assignment pattern (@nicolo-ribaudo)
  • #16778 Respect [no LineTerminator here] after nodes (@nicolo-ribaudo)

:nail_care: Polish

• babel-types
  • #16852 Add deprecated JSDOC for fields (@liuxingbaoyu)

:house: Internal

• babel-core
  • #16820 Allow sync loading of ESM when --experimental-require-module (@nicolo-ribaudo)
• babel-helper-compilation-targets, babel-helper-plugin-utils, babel-preset-env
  • #16858 Add browserslist config to external dependency (@JLHwung)
• babel-plugin-proposal-destructuring-private, babel-plugin-syntax-decimal, babel-plugin-syntax-import-reflection, babel-standalone
  • #16809 Archive syntax-import-reflection and syntax-decimal (@nicolo-ribaudo)
• babel-generator
  • #16779 Simplify logic for [no LineTerminator here] before nodes (@nicolo-ribaudo)

:running_woman: Performance

• babel-plugin-transform-typescript
  • #16875 perf: Avoid extra cloning of namespaces (@liuxingbaoyu)
• babel-types
  • #16842 perf: Improve @babel/types builders (@liuxingbaoyu)
  • #16828 Only access BABEL_TYPES_8_BREAKING at startup (@nicolo-ribaudo)