# jest-leak-detector

> Module for verifying whether an object has been garbage collected or not.

Latest version **30.5.1** (published 2026-09-01) · MIT license · 0 weekly downloads

## Install

```sh
npm install jest-leak-detector
pnpm add jest-leak-detector
yarn add jest-leak-detector
bun add jest-leak-detector
```

## Health

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

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

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 30.5.1 |
| Published | 2026-09-01 |
| First published | 2017-11-11 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Node | ^18.14.0 \|\| ^20.0.0 \|\| ^22.0.0 \|\| >=24.0.0 |
| Dependencies | 2 |
| Unpacked size | 6.8 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 45457 |
| Maintainers | aaronabramov, simenb, rickhanlonii, openjs-operations, cpojer |

## Links

- npm: https://www.npmjs.com/package/jest-leak-detector
- Repository: https://github.com/jestjs/jest
- Homepage: https://github.com/jestjs/jest#readme
- Issues: https://github.com/jestjs/jest/issues
- npm.io page: https://npm.io/package/jest-leak-detector

## Dependencies (2)

- [pretty-format](https://npm.io/package/pretty-format.md) 30.5.1
- [@jest/get-type](https://npm.io/package/@jest/get-type.md) 30.5.0

## Recent versions

- 30.5.1 (latest) — 2026-09-01
- 30.0.0-rc.1 (next) — 2025-06-09
- 30.5.0 — 2026-08-28
- 30.4.1 — 2026-05-08
- 30.4.0 — 2026-05-07
- 30.3.0 — 2026-03-10
- 30.2.0 — 2025-09-28
- 30.1.0 — 2025-08-27
- 30.0.5 — 2025-07-22
- 30.0.2 — 2025-06-19
- 30.0.1 — 2025-06-18
- 30.0.0 — 2025-06-10
- 30.0.0-beta.8 — 2025-06-04
- 30.0.0-beta.7 — 2025-06-04
- 30.0.0-beta.6 — 2025-06-03
- … 169 more at https://npm.io/package/jest-leak-detector/versions

## README

# jest-leak-detector

Module for verifying whether an object has been garbage collected or not.

Internally creates a weak reference to the object, and forces garbage collection to happen. If the reference is gone, it meant no one else was pointing to the object.

## Example

```javascript
(async function () {
  let reference = {};
  let isLeaking;

  const detector = new LeakDetector(reference, {
    shouldGenerateV8HeapSnapshot: true,
  });

  // Reference is held in memory.
  isLeaking = await detector.isLeaking();
  console.log(isLeaking); // true

  // We destroy the only reference to the object.
  reference = null;

  // Reference is gone.
  isLeaking = await detector.isLeaking();
  console.log(isLeaking); // false
})();
```

---
_Source: https://npm.io/package/jest-leak-detector · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._