# unicode-match-property-value-ecmascript

> Match a Unicode property or property alias to its canonical property name per the algorithm used for RegExp Unicode property escapes in ECMAScript.

Latest version **2.2.1** (published 2025-09-09) · MIT license · 0 weekly downloads

## Install

```sh
npm install unicode-match-property-value-ecmascript
pnpm add unicode-match-property-value-ecmascript
yarn add unicode-match-property-value-ecmascript
bun add unicode-match-property-value-ecmascript
```

## Health

**Score 25/100 (F)** — status: maintenance-mode.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: stale; low maintenance score.

## Facts

| | |
|---|---|
| Version | 2.2.1 |
| Published | 2025-09-09 |
| First published | 2017-04-15 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Node | >=4 |
| Dependencies | 0 |
| Unpacked size | 26.1 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 8 |
| Author | Mathias Bynens |
| Maintainers | mathias, google-wombot |
| Keywords | unicode, unicode property values, unicode property value aliases |

## Links

- npm: https://www.npmjs.com/package/unicode-match-property-value-ecmascript
- Repository: https://github.com/mathiasbynens/unicode-match-property-value-ecmascript
- Issues: https://github.com/mathiasbynens/unicode-match-property-value-ecmascript/issues
- npm.io page: https://npm.io/package/unicode-match-property-value-ecmascript

## Recent versions

- 2.2.1 (latest) — 2025-09-09
- 2.2.0 — 2024-09-12
- 2.1.0 — 2022-11-14
- 2.0.0 — 2021-09-14
- 1.2.0 — 2020-03-11
- 1.1.0 — 2019-03-05
- 1.0.2 — 2018-06-07
- 1.0.1 — 2017-06-20
- 1.0.0 — 2017-04-15

## README

# unicode-match-property-value-ecmascript [![unicode-match-property-value-ecmascript on npm](https://img.shields.io/npm/v/unicode-match-property-value-ecmascript)](https://www.npmjs.com/package/unicode-match-property-value-ecmascript)

_unicode-match-property-value-ecmascript_ matches a given Unicode property value or [property value alias](https://github.com/mathiasbynens/unicode-property-value-aliases) to its canonical property value without applying [loose matching](https://github.com/mathiasbynens/unicode-loose-match), per the algorithm used for [RegExp Unicode property escapes in ECMAScript](https://github.com/tc39/proposal-regexp-unicode-property-escapes). Consider it a strict alternative to loose matching.

## Installation

To use _unicode-match-property-value-ecmascript_ programmatically, install it as a dependency via [npm](https://www.npmjs.com/):

```bash
$ npm install unicode-match-property-value-ecmascript
```

Then, `require` it:

```js
const matchPropertyValue = require('unicode-match-property-value-ecmascript');
```

## API

This module exports a single function named `matchPropertyValue`.

### `matchPropertyValue(property, value)`

This function takes a string `property` that is a canonical/unaliased Unicode property name, and a string `value`. It attemps to  match `value` to a canonical Unicode property value for the given property. If there’s a match, it returns the canonical property value. Otherwise, it throws an exception.

```js
// Find the canonical property value:
matchPropertyValue('Script_Extensions', 'Aghb')
// → 'Caucasian_Albanian'

matchPropertyValue('Script_Extensions', 'Caucasian_Albanian')
// → 'Caucasian_Albanian'

matchPropertyValue('script_extensions', 'Caucasian_Albanian') // Note: incorrect casing.
// → throws

matchPropertyValue('Script_Extensions', 'caucasian_albanian') // Note: incorrect casing.
// → throws
```

## For maintainers

### How to publish a new release

1. On the `main` branch, bump the version number in `package.json`:

    ```sh
    npm version patch -m 'Release v%s'
    ```

    Instead of `patch`, use `minor` or `major` [as needed](https://semver.org/).

    Note that this produces a Git commit + tag.

1. Push the release commit and tag:

    ```sh
    git push && git push --tags
    ```

    Our CI then automatically publishes the new release to npm.

## Author

| [![twitter/mathias](https://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") |
|---|
| [Mathias Bynens](https://mathiasbynens.be/) |

## License

_unicode-match-property-value-ecmascript_ is available under the [MIT](https://mths.be/mit) license.

---
_Source: https://npm.io/package/unicode-match-property-value-ecmascript · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._