string-character-is-astral-surrogate/README.md

Tells, is given character a part of astral character, specifically, a high and low surrogate

<h1 align="center">string-character-is-astral-surrogate</h1>

<p align="center">Tells, is given character a part of astral character, specifically, a high and low surrogate</p>

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## 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, 1.13.0 (`npm i string-character-is-astral-surrogate@1.13.0`).

```bash
npm i string-character-is-astral-surrogate
```

## Quick Take

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

import {
  isHighSurrogate,
  isLowSurrogate,
} from "string-character-is-astral-surrogate";

// 🧢 = \uD83E\uDDE2

assert.equal(isHighSurrogate("\uD83E"), true);
// the first character, high surrogate of the cap is indeed a high surrogate

assert.equal(isHighSurrogate("\uDDE2"), false);
// the second character, low surrogate of the cap is NOT a high surrogate

assert.equal(isLowSurrogate("\uD83E"), false);
// the first character, high surrogate of the cap is NOT a low surrogate
// it's a high surrogate

assert.equal(isLowSurrogate("\uDDE2"), true);
// the second character, low surrogate of the cap is indeed a low surrogate
```

## Documentation

Please [visit codsen.com](https://codsen.com/os/string-character-is-astral-surrogate/) for a full description of the API.

## 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 © 2010-2025 Roy Revelt and other contributors.

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