# postcss-attribute-case-insensitive

> Enable support for case insensitive attribute matching in selectors

Latest version **8.0.0** (published 2026-01-14) · MIT license · 0 weekly downloads

## Install

```sh
npm install postcss-attribute-case-insensitive
pnpm add postcss-attribute-case-insensitive
yarn add postcss-attribute-case-insensitive
bun add postcss-attribute-case-insensitive
```

## Health

**Score 55/100 (C)** — status: stable.

Positive: esm support; no vulnerabilities; high maintenance score.

Warnings: low downloads; no types.

## Facts

| | |
|---|---|
| Version | 8.0.0 |
| Published | 2026-01-14 |
| First published | 2016-08-10 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | ESM |
| Node | >=20.19.0 |
| Dependencies | 1 |
| Unpacked size | 8.3 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 1053 |
| Maintainers | jonathantneal, alaguna, romainmenke, semigradsky |
| Keywords | attribute, css, CSS4, insensitive, postcss, postcss-plugin, sensitive |

## Links

- npm: https://www.npmjs.com/package/postcss-attribute-case-insensitive
- Repository: https://github.com/csstools/postcss-plugins
- Homepage: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-attribute-case-insensitive#readme
- Issues: https://github.com/csstools/postcss-plugins/issues
- Funding: https://github.com/sponsors/csstools
- npm.io page: https://npm.io/package/postcss-attribute-case-insensitive

## Dependencies (1)

- [postcss-selector-parser](https://npm.io/package/postcss-selector-parser.md) ^7.1.1

## Alternatives

- [style-dictionary](https://npm.io/package/style-dictionary.md) — 2.0M weekly downloads
- [postcss-merge-idents](https://npm.io/package/postcss-merge-idents.md) — 1.7M weekly downloads
- [@fontsource/noto-sans](https://npm.io/package/@fontsource/noto-sans.md) — 93.0K weekly downloads
- [uglifycss](https://npm.io/package/uglifycss.md) — 71.6K weekly downloads
- [mat4-interpolate](https://npm.io/package/mat4-interpolate.md) — 23.3K weekly downloads

## Recent versions

- 8.0.0 (latest) — 2026-01-14
- 7.0.1 — 2024-10-23
- 7.0.0 — 2024-08-03
- 6.0.3 — 2024-02-19
- 6.0.2 — 2023-02-06
- 6.0.1 — 2023-01-28
- 6.0.0 — 2023-01-24
- 5.0.2 — 2022-07-08
- 5.0.1 — 2022-06-03
- 5.0.0 — 2020-09-15
- 4.0.2 — 2020-01-23
- 4.0.1 — 2019-01-10
- 4.0.0 — 2018-09-18
- 3.0.1 — 2018-06-26
- 3.0.0 — 2018-05-08
- … 3 more at https://npm.io/package/postcss-attribute-case-insensitive/versions

## README

# PostCSS Attribute Case Insensitive [<img src="https://postcss.github.io/postcss/logo.svg" alt="PostCSS Logo" width="90" height="90" align="right">][PostCSS]

`npm install postcss-attribute-case-insensitive --save-dev`

[PostCSS Attribute Case Insensitive] enables support for [Case Insensitive Attribute] matching in selectors.

```css
[frame=hsides i] {
	border-style: solid none;
}

/* becomes */

[frame=hsides],[frame=Hsides],[frame=hSides],[frame=HSides],[frame=hsIdes],[frame=HsIdes],[frame=hSIdes],[frame=HSIdes],[frame=hsiDes],[frame=HsiDes],[frame=hSiDes],[frame=HSiDes],[frame=hsIDes],[frame=HsIDes],[frame=hSIDes],[frame=HSIDes],[frame=hsidEs],[frame=HsidEs],[frame=hSidEs],[frame=HSidEs],[frame=hsIdEs],[frame=HsIdEs],[frame=hSIdEs],[frame=HSIdEs],[frame=hsiDEs],[frame=HsiDEs],[frame=hSiDEs],[frame=HSiDEs],[frame=hsIDEs],[frame=HsIDEs],[frame=hSIDEs],[frame=HSIDEs],[frame=hsideS],[frame=HsideS],[frame=hSideS],[frame=HSideS],[frame=hsIdeS],[frame=HsIdeS],[frame=hSIdeS],[frame=HSIdeS],[frame=hsiDeS],[frame=HsiDeS],[frame=hSiDeS],[frame=HSiDeS],[frame=hsIDeS],[frame=HsIDeS],[frame=hSIDeS],[frame=HSIDeS],[frame=hsidES],[frame=HsidES],[frame=hSidES],[frame=HSidES],[frame=hsIdES],[frame=HsIdES],[frame=hSIdES],[frame=HSIdES],[frame=hsiDES],[frame=HsiDES],[frame=hSiDES],[frame=HSiDES],[frame=hsIDES],[frame=HsIDES],[frame=hSIDES],[frame=HSIDES] {
	border-style: solid none;
}
```

## Usage

Add [PostCSS Attribute Case Insensitive] to your project:

```bash
npm install postcss postcss-attribute-case-insensitive --save-dev
```

Use it as a [PostCSS] plugin:

```js
const postcss = require('postcss');
const postcssAttributeCaseInsensitive = require('postcss-attribute-case-insensitive');

postcss([
	postcssAttributeCaseInsensitive(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);
```



## Options

### preserve

The `preserve` option determines whether the original notation
is preserved. By default, it is not preserved.

```js
postcssAttributeCaseInsensitive({ preserve: true })
```

```css
[frame=hsides i] {
	border-style: solid none;
}

/* becomes */

[frame=hsides],[frame=Hsides],[frame=hSides],[frame=HSides],[frame=hsIdes],[frame=HsIdes],[frame=hSIdes],[frame=HSIdes],[frame=hsiDes],[frame=HsiDes],[frame=hSiDes],[frame=HSiDes],[frame=hsIDes],[frame=HsIDes],[frame=hSIDes],[frame=HSIDes],[frame=hsidEs],[frame=HsidEs],[frame=hSidEs],[frame=HSidEs],[frame=hsIdEs],[frame=HsIdEs],[frame=hSIdEs],[frame=HSIdEs],[frame=hsiDEs],[frame=HsiDEs],[frame=hSiDEs],[frame=HSiDEs],[frame=hsIDEs],[frame=HsIDEs],[frame=hSIDEs],[frame=HSIDEs],[frame=hsideS],[frame=HsideS],[frame=hSideS],[frame=HSideS],[frame=hsIdeS],[frame=HsIdeS],[frame=hSIdeS],[frame=HSIdeS],[frame=hsiDeS],[frame=HsiDeS],[frame=hSiDeS],[frame=HSiDeS],[frame=hsIDeS],[frame=HsIDeS],[frame=hSIDeS],[frame=HSIDeS],[frame=hsidES],[frame=HsidES],[frame=hSidES],[frame=HSidES],[frame=hsIdES],[frame=HsIdES],[frame=hSIdES],[frame=HSIdES],[frame=hsiDES],[frame=HsiDES],[frame=hSiDES],[frame=HSiDES],[frame=hsIDES],[frame=HsIDES],[frame=hSIDES],[frame=HSIDES] {
	border-style: solid none;
}
[frame=hsides i] {
	border-style: solid none;
}
```

[cli-url]: https://github.com/csstools/postcss-plugins/actions/workflows/test.yml?query=workflow/test
[css-url]: https://cssdb.org/#case-insensitive-attributes
[discord]: https://discord.gg/bUadyRwkJS
[npm-url]: https://www.npmjs.com/package/postcss-attribute-case-insensitive

[PostCSS]: https://github.com/postcss/postcss
[PostCSS Attribute Case Insensitive]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-attribute-case-insensitive
[Case Insensitive Attribute]: https://www.w3.org/TR/selectors4/#attribute-case

---
_Source: https://npm.io/package/postcss-attribute-case-insensitive · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._