@babel/compat-data

What is @babel/compat-data?

The @babel/compat-data package provides data about the environment features that Babel can target. It includes information about browser and JavaScript engine versions that support various ECMAScript features. This data is used by Babel to determine which transformations and polyfills are necessary for a given target environment.

What are @babel/compat-data's main functionalities?

Environment Data Retrieval

Retrieve compatibility data for the last two versions of browsers. This is used in Babel's preset-env to determine which transformations/polyfills are needed.

"last 2 versions"

Specific Feature Data

Get data about a specific ECMAScript feature, such as arrow functions, to see which environments support it natively.

"es6.arrow-functions"

Other packages similar to @babel/compat-data

core-js-compat

Provides compatibility data for core-js, a library that includes polyfills for ECMAScript features. It is similar to @babel/compat-data but focuses on the features polyfilled by core-js.

caniuse-lite

A lighter version of caniuse-db, containing browser support tables for front-end technologies. It is similar to @babel/compat-data in that it provides compatibility data, but it is more general and not specific to Babel's needs.

browserslist

A tool for sharing target browsers and Node.js versions between different front-end tools. It is similar to @babel/compat-data in that it helps determine which environments to target, but it does not provide specific feature support data.

README

@babel/compat-data

The compat-data to determine required Babel plugins

See our website @babel/compat-data for more information.

Install

Using npm:

npm install --save @babel/compat-data

or using yarn:

yarn add @babel/compat-data

Changelog

v7.28.0 (2025-07-02)

:rocket: New Feature

• babel-node
  • #17147 Support top level await in node repl (@liuxingbaoyu)
• babel-types
  • #17258 feat(matchesPattern): support super/private/meta (@JLHwung)
• babel-compat-data, babel-preset-env
  • #17355 Add explicit resource management to preset-env (@JLHwung)
• babel-core, babel-parser
  • #17390 Support sourceType: "commonjs" (@JLHwung)
• babel-generator, babel-parser
  • #17346 Materialize explicitResourceManagement parser plugin (@JLHwung)
• babel-plugin-proposal-destructuring-private, babel-plugin-proposal-do-expressions, babel-plugin-transform-object-rest-spread, babel-traverse, babel-types
  • #17391 LVal coverage updates (Part 2) (@JLHwung)
• babel-parser, babel-traverse, babel-types
  • #17378 Accept bigints in t.bigIntLiteral factory (@JLHwung)
• babel-generator, babel-plugin-proposal-destructuring-private, babel-plugin-proposal-discard-binding, babel-plugin-transform-destructuring, babel-plugin-transform-explicit-resource-management, babel-plugin-transform-react-display-name, babel-types
  • #17277 Transform discard binding (@JLHwung)
• babel-generator, babel-parser, babel-plugin-proposal-destructuring-private, babel-plugin-transform-block-scoping, babel-plugin-transform-object-rest-spread, babel-plugin-transform-typescript, babel-traverse, babel-types
  • #17163 Parse discard binding (@JLHwung)

:bug: Bug Fix

• babel-helper-globals, babel-plugin-transform-classes, babel-traverse
  • #17297 Create babel-helper-globals (@JLHwung)
• babel-types
  • #17009 feature: TSTypeOperator: keyof (#16799) (@coderaiser)

:house: Internal

• babel-compat-data, babel-plugin-proposal-decorators, babel-plugin-transform-async-generator-functions, babel-plugin-transform-json-modules, babel-plugin-transform-regenerator, babel-plugin-transform-runtime, babel-preset-env, babel-runtime-corejs3
  • #17403 Update babel-polyfill packages (@nicolo-ribaudo)