string-extract-class-names/README.md

Extracts CSS class/id names from a string

<h1 align="center">string-extract-class-names</h1>

<p align="center">Extracts CSS class/id names from a string</p>

<p align="center">
  <a href="https://codsen.com/os/string-extract-class-names" 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-extract-class-names" 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-extract-class-names" 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-extract-class-names?interval=30" rel="nofollow noreferrer noopener" target="_blank">
    <img src="https://img.shields.io/npm/dm/string-extract-class-names.svg?style=flat-square" alt="Downloads per month">
  </a>
  <a href="https://codsen.com/os/string-extract-class-names/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>

## 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, 6.1.0 (`npm i string-extract-class-names@6.1.0`).

```bash
npm i string-extract-class-names
```

## Quick Take

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

import { extract } from "string-extract-class-names";

// extracts classes and/or id's
const str = "div#brambles.nushes#croodles";
const { res, ranges } = extract(str);
assert.deepEqual(res, ["#brambles", ".nushes", "#croodles"]);
assert.deepEqual(ranges, [
  [3, 12],
  [12, 19],
  [19, 28],
]);

// `res` can be produced by slicing `ranges`:
assert.deepEqual(
  res,
  ranges.map(([from, to]) => str.slice(from, to)),
);
```

## Documentation

Please [visit codsen.com](https://codsen.com/os/string-extract-class-names/) 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.

<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>