# @stryker-mutator/util

> Contains utilities for Stryker, the mutation testing framework for JavaScript and friends

Latest version **10.0.0** (published 2026-08-14) · Apache-2.0 license · 0 weekly downloads

## Install

```sh
npm install @stryker-mutator/util
pnpm add @stryker-mutator/util
yarn add @stryker-mutator/util
bun add @stryker-mutator/util
```

## Health

**Score 65/100 (B)** — status: active.

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

Warnings: low downloads; no types.

## Facts

| | |
|---|---|
| Version | 10.0.0 |
| Published | 2026-08-14 |
| First published | 2018-10-15 |
| Weekly downloads | 0 |
| License | Apache-2.0 |
| TypeScript types | none |
| Module format | ESM |
| Dependencies | 0 |
| Unpacked size | 63 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 3172 |
| Author | Nico Jansen |
| Maintainers | nicojs, simondel, strykermutator-npa |
| Keywords | stryker, utils |

## Links

- npm: https://www.npmjs.com/package/@stryker-mutator/util
- Repository: https://github.com/stryker-mutator/stryker-js
- Homepage: https://github.com/stryker-mutator/stryker-js/tree/master/packages/util#readme
- Issues: https://github.com/stryker-mutator/stryker-js/issues
- npm.io page: https://npm.io/package/@stryker-mutator/util

## Recent versions

- 10.0.0 (latest) — 2026-08-14
- 6.4.0-beta.3 (next) — 2023-01-17
- 9.6.1 — 2026-04-10
- 9.6.0 — 2026-02-27
- 9.5.1 — 2026-02-02
- 9.5.0 — 2026-01-30
- 9.4.0 — 2025-11-23
- 9.3.0 — 2025-10-28
- 9.2.0 — 2025-10-04
- 9.1.1 — 2025-08-30
- 9.1.0 — 2025-08-30
- 9.0.1 — 2025-05-14
- 9.0.0 — 2025-05-13
- 8.7.1 — 2024-12-11
- 8.7.0 — 2024-12-06
- … 101 more at https://npm.io/package/@stryker-mutator/util/versions

## README

[![Mutation testing badge](https://img.shields.io/endpoint?style=flat&url=https%3A%2F%2Fbadge-api.stryker-mutator.io%2Fgithub.com%2Fstryker-mutator%2Fstryker-js%2Fmaster%3Fmodule%3Dutil)](https://dashboard.stryker-mutator.io/reports/github.com/stryker-mutator/stryker-js/master?module=util)
[![Build Status](https://github.com/stryker-mutator/stryker-js/workflows/CI/badge.svg)](https://github.com/stryker-mutator/stryker-js/actions?query=workflow%3ACI+branch%3Amaster)
[![NPM](https://img.shields.io/npm/dm/@stryker-mutator/util.svg)](https://www.npmjs.com/package/@stryker-mutator/util)
[![Node version](https://img.shields.io/node/v/@stryker-mutator/util.svg)](https://img.shields.io/node/v/@stryker-mutator/util.svg)
[![Slack Chat](https://img.shields.io/badge/slack-chat-brightgreen.svg?logo=slack)](https://join.slack.com/t/stryker-mutator/shared_invite/enQtOTUyMTYyNTg1NDQ0LTU4ODNmZDlmN2I3MmEyMTVhYjZlYmJkOThlNTY3NTM1M2QxYmM5YTM3ODQxYmJjY2YyYzllM2RkMmM1NjNjZjM)

![Stryker](https://github.com/stryker-mutator/stryker-js/raw/master/stryker-80x80.png)

# StrykerJS Util

Utility functions for StrykerJS plugins and/or core packages.

Note: this is not designed to be for use outside of the StrykerJS ecosystem and thus does **NOT follow strict semver**. Use at your own risk.

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_Source: https://npm.io/package/@stryker-mutator/util · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._