@babel/plugin-syntax-typescript

What is @babel/plugin-syntax-typescript?

The @babel/plugin-syntax-typescript package is a plugin for Babel that allows Babel to parse TypeScript syntax. This means it enables Babel to understand TypeScript code, but it does not perform type checking or compilation to JavaScript. It's primarily used in projects that want to take advantage of Babel's transformations and plugins while writing their code in TypeScript.

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

Parsing TypeScript Syntax

This feature allows Babel to parse TypeScript code, including imports, exports, interfaces, and type annotations, without performing type checking. It's useful for projects that use Babel for code transformation and want to write their source code in TypeScript.

import { foo } from 'bar';
interface MyInterface {
  myProperty: string;
}
const myVar: MyInterface = { myProperty: 'Hello' };

Other packages similar to @babel/plugin-syntax-typescript

typescript

The TypeScript package is the official compiler for TypeScript. Unlike @babel/plugin-syntax-typescript, it performs both parsing and compilation of TypeScript code into JavaScript, including type checking. It's a more comprehensive solution for projects that are exclusively using TypeScript.

@typescript-eslint/parser

This package is an ESLint parser that allows ESLint to lint TypeScript code. It's similar to @babel/plugin-syntax-typescript in that it enables understanding of TypeScript syntax, but it's specifically focused on linting rather than transforming code.

ts-node

ts-node is a TypeScript execution engine and REPL for Node.js. It allows you to directly run TypeScript files in Node.js without pre-compiling them. This is different from @babel/plugin-syntax-typescript, which only parses TypeScript syntax for Babel transformations and does not include an execution environment.

README

@babel/plugin-syntax-typescript

Allow parsing of TypeScript syntax

See our website @babel/plugin-syntax-typescript for more information.

Install

Using npm:

npm install --save-dev @babel/plugin-syntax-typescript

or using yarn:

yarn add @babel/plugin-syntax-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)