# @babel/plugin-transform-private-property-in-object

> This plugin transforms checks for a private property in an object

Latest version **8.0.5** (published 2026-09-10) · MIT license · 0 weekly downloads

## Install

```sh
npm install @babel/plugin-transform-private-property-in-object
pnpm add @babel/plugin-transform-private-property-in-object
yarn add @babel/plugin-transform-private-property-in-object
bun add @babel/plugin-transform-private-property-in-object
```

## Health

**Score 70/100 (B)** — status: active.

Positive: esm support; no vulnerabilities; has provenance; recently updated; high maintenance score; popular repo.

Warnings: low downloads; no types.

## Facts

| | |
|---|---|
| Version | 8.0.5 |
| Published | 2026-09-10 |
| First published | 2023-05-26 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | ESM + CommonJS |
| Node | ^22.18.0 \|\| >=24.11.0 |
| Dependencies | 3 |
| Unpacked size | 18.9 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 43992 |
| Author | The Babel Team (https://babel.dev/team) |
| Maintainers | hzoo, existentialism, nicolo-ribaudo, jlhwung |
| Keywords | babel-plugin |

## Links

- npm: https://www.npmjs.com/package/@babel/plugin-transform-private-property-in-object
- Repository: https://github.com/babel/babel
- Homepage: https://babel.dev/docs/en/next/babel-plugin-transform-private-property-in-object
- npm.io page: https://npm.io/package/@babel/plugin-transform-private-property-in-object

## Dependencies (3)

- [@babel/helper-plugin-utils](https://npm.io/package/@babel/helper-plugin-utils.md) ^8.0.1
- [@babel/helper-annotate-as-pure](https://npm.io/package/@babel/helper-annotate-as-pure.md) ^8.0.0
- [@babel/helper-create-class-features-plugin](https://npm.io/package/@babel/helper-create-class-features-plugin.md) ^8.0.5

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## Recent versions

- 8.0.5 (latest) — 2026-09-10
- 8.0.0-rc.6 (next) — 2026-05-25
- 8.0.1 — 2026-06-17
- 8.0.0 — 2026-06-16
- 7.29.7 — 2026-05-25
- 8.0.0-rc.5 — 2026-05-12
- 8.0.0-rc.4 — 2026-04-29
- 8.0.0-rc.3 — 2026-03-16
- 8.0.0-rc.2 — 2026-02-15
- 8.0.0-rc.1 — 2026-01-31
- 7.28.6 — 2026-01-12
- 8.0.0-beta.4 — 2026-01-12
- 8.0.0-beta.3 — 2025-10-23
- 8.0.0-beta.2 — 2025-09-05
- 8.0.0-beta.1 — 2025-07-02
- … 33 more at https://npm.io/package/@babel/plugin-transform-private-property-in-object/versions

## README

<p align="center">
  <a href="https://babeljs.io/">
    <img alt="babel" src="https://raw.githubusercontent.com/babel/logo/master/babel.png" width="546">
  </a>
</p>

<p align="center">
  The compiler for writing next generation JavaScript.
</p>

<p align="center">
    <a href="https://npmx.dev/package/@babel/core"><img alt="npm Downloads" src="https://img.shields.io/npm/dm/@babel/core.svg?maxAge=43200&label=npm%20downloads&logo=babel&logoSize=auto"></a>
</p>
<p align="center">
  <a href="https://github.com/babel/babel/actions/workflows/ci.yml"><img alt="GitHub CI Status" src="https://github.com/babel/babel/actions/workflows/ci.yml/badge.svg?branch=main"></a>
  <a href="https://codecov.io/github/babel/babel"><img alt="Coverage Status" src="https://img.shields.io/codecov/c/github/babel/babel/main.svg?maxAge=43200&logo=codecov"></a>
  <a href="https://pkg.pr.new/~/babel/babel"><img alt="pkg.pr.new" src="https://img.shields.io/badge/PR_previews-pkg.pr.new-10a5e9"></a>
</p>
<p align="center">
  <a href="https://slack.babeljs.io/"><img alt="Slack Status" src="https://img.shields.io/badge/chat-on_slack-brightgreen?style=flat&logo=slack&logoColor=white"></a>
</p>

<h2 align="center">Supporting Babel</h2>

<p align="center">
  <a href="#backers"><img alt="Backers on Open Collective" src="https://opencollective.com/babel/backers/badge.svg" /></a>
  <a href="#sponsors"><img alt="Sponsors on Open Collective" src="https://opencollective.com/babel/sponsors/badge.svg" /></a>
  <a href="https://medium.com/friendship-dot-js/i-peeked-into-my-node-modules-directory-and-you-wont-believe-what-happened-next-b89f63d21558"><img alt="Business Strategy Status" src="https://img.shields.io/badge/business%20model-flavortown-green.svg"></a>
</p>

Babel (pronounced ["babble"](https://soundcloud.com/sebmck/how-to-pronounce-babel))  is a community-driven project used by many companies and projects, and is maintained by a group of [volunteers](https://babeljs.io/team). If you'd like to help support the future of the project, please consider:

- Giving developer time on the project. (Message us on [Twitter](https://twitter.com/babeljs) or [Slack](https://slack.babeljs.io/) for guidance!)
- Giving funds by becoming a sponsor on [Open Collective](https://opencollective.com/babel) or [GitHub](https://github.com/sponsors/babel/) (which goes to our Open Collective account)!

## Sponsors

Our top sponsors are shown below! [[Become a sponsor](https://opencollective.com/babel#sponsor)]

<a href="https://opencollective.com/babel/sponsor/0/website" target="_blank"><img src="https://opencollective.com/babel/sponsor/0/avatar.svg"></a>
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## Intro

Babel is a tool that helps you write code in the latest version of JavaScript. When your supported environments don't support certain features natively, Babel will help you compile those features down to a supported version.

**In**

```js
// ES2020 nullish coalescing
function greet(input) {
  return input ?? "Hello world";
}
```

**Out**

```js
function greet(input) {
  return input != null ? input : "Hello world";
}
```

Try it out at our [REPL](https://babel.dev/repl#?browsers=defaults&loose=true&code_lz=GYVwdgxgLglg9mABAcwE4FN1QBQzABxCgEpEBvAKEUQyhFST0KkQH5XEAiACXQBs-cRAHc4qPgBNOAbgoBfIA&shippedProposals=true&sourceType=script&lineWrap=true&presets=env%2Cenv&prettier=true&forceAllTransforms=true).

## FAQ

### Who maintains Babel?

Mostly a handful of volunteers, funded by you! Please check out our [team page](https://babeljs.io/team)!

### Is there a Babel song?

I'm so glad you asked: [Hallelujah —— In Praise of Babel](SONG.md) by [@angus-c](https://github.com/angus-c), [audio version](https://youtu.be/40abpedBKK8) by [@swyx](https://twitter.com/@swyx). Tweet us your recordings!

### Looking for support?

For questions and support please [join or open a GitHub Discussion](https://github.com/babel/babel/discussions), join our [Slack Community](https://slack.babeljs.io/) (you can [sign up here](https://slack.babeljs.io/) for an invite), ask a question on [Stack Overflow](https://stackoverflow.com/questions/tagged/babeljs), or ping us on [Bluesky](https://bsky.app/profile/babel.dev).

### Where are the docs?

Check out our website: [babeljs.io](https://babeljs.io/), and report issues/features at [babel/website](https://github.com/babel/website/issues).

### Want to report a bug or request a feature?

Please read through our [CONTRIBUTING.md](CONTRIBUTING.md) and fill out the issue template at [babel/issues](https://github.com/babel/babel/issues)!

### Want to contribute to Babel?

Check out:

- Our [#development](https://babeljs.slack.com/messages/development) Slack channel and say hi! ([sign-up](https://slack.babeljs.io))
- Issues with the [good first issue](https://github.com/babel/babel/labels/good%20first%20issue) and [help wanted](https://github.com/babel/babel/labels/help%20wanted) label. We suggest also looking at the [closed ones](https://github.com/babel/babel/issues?utf8=%E2%9C%93&q=is%3Aclosed+label%3A%22good+first+issue%22) to get a sense of the kinds of issues you can tackle.

Some resources:

- Our [CONTRIBUTING.md](CONTRIBUTING.md) to get started with setting up the repo.
- Our discussions/notes/roadmap: [babel/notes](https://github.com/babel/notes)
- Our progress on TC39 proposals: [babel/proposals](https://github.com/babel/proposals)
- Our blog which contains release posts and explanations: [/blog](https://babeljs.io/blog)
- Our videos page with talks about open source and Babel: [/videos](https://babeljs.io/videos)
- Our [podcast](https://podcast.babeljs.io)

### How is the repo structured?

The Babel repo is managed as a [monorepo](doc/design/monorepo.md) that is composed of many [npm packages](packages/README.md).

## License

[MIT](LICENSE)

---
_Source: https://npm.io/package/@babel/plugin-transform-private-property-in-object · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._