# string-match-left-right

> Match substrings on the left or right of a given index, ignoring whitespace

Latest version **9.2.5** (published 2026-09-09) · MIT license · 0 weekly downloads

## Install

```sh
npm install string-match-left-right
pnpm add string-match-left-right
yarn add string-match-left-right
bun add string-match-left-right
```

## Health

**Score 75/100 (B)** — status: active.

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

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 9.2.5 |
| Published | 2026-09-09 |
| First published | 2017-10-28 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM |
| Node | >=18.20.8 |
| Dependencies | 2 |
| Unpacked size | 44.8 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 214 |
| Author | Roy Revelt |
| Maintainers | royston |
| Keywords | left, march, match, no-parsing, right, string, traverse, utility |

## Links

- npm: https://www.npmjs.com/package/string-match-left-right
- Repository: https://github.com/codsen/codsen
- Homepage: https://codsen.com/os/string-match-left-right
- Issues: https://github.com/codsen/codsen/issues
- npm.io page: https://npm.io/package/string-match-left-right

## Dependencies (2)

- [codsen-utils](https://npm.io/package/codsen-utils.md) ^1.10.2
- [arrayiffy-if-string](https://npm.io/package/arrayiffy-if-string.md) ^5.2.3

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## Recent versions

- 9.2.5 (latest) — 2026-09-09
- 9.2.4 — 2026-09-06
- 9.2.3 — 2026-09-01
- 9.2.2 — 2026-08-23
- 9.2.1 — 2026-08-19
- 9.2.0 — 2026-08-19
- 9.1.3 — 2026-01-15
- 9.1.0 — 2025-10-15
- 9.0.34 — 2025-10-12
- 9.0.33 — 2025-10-08
- 9.0.32 — 2025-10-07
- 9.0.23 — 2025-07-21
- 9.0.22 — 2025-03-02
- 9.0.19 — 2024-03-30
- 9.0.18 — 2024-01-31
- … 180 more at https://npm.io/package/string-match-left-right/versions

## README

<h1 align="center">string-match-left-right</h1>

<p align="center">Match substrings on the left or right of a given index, ignoring whitespace</p>

<p align="center">
  <a href="https://codsen.com/os/string-match-left-right" rel="nofollow noreferrer noopener">
    <img src="https://img.shields.io/badge/-codsen-blue?style=flat-square" alt="page on codsen.com">
  </a>
  <a href="https://www.npmjs.com/package/string-match-left-right" rel="nofollow noreferrer noopener">
    <img src="https://img.shields.io/badge/-npm-blue?style=flat-square" alt="page on npm">
  </a>
  <a href="https://github.com/codsen/codsen/tree/main/packages/string-match-left-right" rel="nofollow noreferrer noopener">
    <img src="https://img.shields.io/badge/-github-blue?style=flat-square" alt="page on github">
  </a>
  <a href="https://npmcharts.com/compare/string-match-left-right?interval=30" rel="nofollow noreferrer noopener" target="_blank">
    <img src="https://img.shields.io/npm/dm/string-match-left-right.svg?style=flat-square" alt="Downloads per month">
  </a>
  <a href="https://codsen.com/os/string-match-left-right/changelog" rel="nofollow noreferrer noopener">
    <img src="https://img.shields.io/badge/changelog-here-brightgreen?style=flat-square" alt="changelog">
  </a>
  <img src="https://img.shields.io/badge/licence-MIT-brightgreen.svg?style=flat-square" alt="MIT Licence">
</p>

**No 3rd party dependencies.** All dependencies, checked recursively, are Codsen packages.

## Install

This package is [pure ESM](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c). If you're not ready yet, install an older version of this program, 7.1.0 (`npm i string-match-left-right@7.1.0`).

```bash
npm i string-match-left-right
```

## Quick Take

```js
import { strict as assert } from "node:assert";

import { matchRight } from "string-match-left-right";

assert.equal(matchRight("abcdefghi", 3, ["ef", "zz"]), "ef");
```


## Documentation

Please [visit codsen.com](https://codsen.com/os/string-match-left-right/) for a full description of the API. For **Changelog**, see [raw md on GitHub](https://github.com/codsen/codsen/blob/main/packages/string-match-left-right/CHANGELOG.md) or [the website](https://codsen.com/os/string-match-left-right/changelog).

## Contributing

To report bugs or request features or assistance, [raise an issue](https://github.com/codsen/codsen/issues/new/choose) on GitHub.

## Licence

MIT License

Copyright © 2010-2026 Roy Revelt and other contributors

<p align="center"><img src="https://codsen.com/images/png-codsen-ok.png" width="98" alt="ok" align="center"> <img src="https://codsen.com/images/png-codsen-1.png" width="148" alt="codsen" align="center"> <img src="https://codsen.com/images/png-codsen-star-small.png" width="32" alt="star" align="center"></p>

---
_Source: https://npm.io/package/string-match-left-right · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._