# @csstools/postcss-unset-value

> Use the unset keyword in CSS.

Latest version **5.0.0** (published 2026-01-14) · MIT-0 license · 0 weekly downloads

## Install

```sh
npm install @csstools/postcss-unset-value
pnpm add @csstools/postcss-unset-value
yarn add @csstools/postcss-unset-value
bun add @csstools/postcss-unset-value
```

## Health

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

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

Warnings: low downloads; no types.

## Facts

| | |
|---|---|
| Version | 5.0.0 |
| Published | 2026-01-14 |
| First published | 2022-02-21 |
| Weekly downloads | 0 |
| License | MIT-0 |
| TypeScript types | none |
| Module format | ESM |
| Node | >=20.19.0 |
| Dependencies | 0 |
| Unpacked size | 12.7 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 1053 |
| Maintainers | jonathantneal, alaguna, romainmenke |
| Keywords | inherit, initial, postcss-plugin, unset |

## Links

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

## Recent versions

- 5.0.0 (latest) — 2026-01-14
- 4.0.0 — 2024-08-03
- 3.0.1 — 2023-12-15
- 3.0.0 — 2023-07-03
- 2.0.1 — 2023-01-28
- 2.0.0 — 2023-01-24
- 1.0.2 — 2022-07-08
- 1.0.1 — 2022-05-11
- 1.0.0 — 2022-02-21

## README

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


[<img alt="npm version" src="https://img.shields.io/npm/v/@csstools/postcss-unset-value.svg" height="20">][npm-url]
[<img alt="Build Status" src="https://github.com/csstools/postcss-plugins/actions/workflows/test.yml/badge.svg?branch=main" height="20">][cli-url]
[<img alt="Discord" src="https://shields.io/badge/Discord-5865F2?logo=discord&logoColor=white">][discord]
<br><br>
[<img alt="Baseline Status" src="https://cssdb.org/images/badges-baseline/unset-value.svg" height="20">][css-url]
[<img alt="CSS Standard Status" src="https://cssdb.org/images/badges/unset-value.svg" height="20">][css-url]

[PostCSS Unset Value] lets you use the unset keyword, following the [CSS Cascading and Inheritance] specification.

```css
.color {
	color: unset;
}

.border-color {
	border-color: unset;
}

.margin {
	margin: unset;
}


/* becomes */
.color {
	color: inherit;
}

.border-color {
	border-color: initial;
}

.margin {
	margin: initial;
}
```

## Usage

Add [PostCSS Unset Value] to your project:

```bash
npm install postcss @csstools/postcss-unset-value --save-dev
```

Use it as a [PostCSS] plugin:

```js
const postcss = require('postcss');
const postcssUnsetValue = require('@csstools/postcss-unset-value');

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

[PostCSS Unset Value] runs in all Node environments, with special
instructions for:

| [Node](INSTALL.md#node) | [PostCSS CLI](INSTALL.md#postcss-cli) | [Webpack](INSTALL.md#webpack) | [Gulp](INSTALL.md#gulp) | [Grunt](INSTALL.md#grunt) |
| --- | --- | --- | --- | --- |

## Options

### preserve

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

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

```css
.color {
	color: unset;
}

.border-color {
	border-color: unset;
}

.margin {
	margin: unset;
}

/* becomes */

.color {
	color: inherit;
	color: unset;
}

.border-color {
	border-color: initial;
	border-color: unset;
}

.margin {
	margin: initial;
	margin: unset;
}
```

[postcss]: https://github.com/postcss/postcss

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

[Gulp PostCSS]: https://github.com/postcss/gulp-postcss
[Grunt PostCSS]: https://github.com/nDmitry/grunt-postcss
[PostCSS]: https://github.com/postcss/postcss
[PostCSS Loader]: https://github.com/postcss/postcss-loader
[CSS Cascading and Inheritance]: https://www.w3.org/TR/css-cascade-4/#inherit-initial
[PostCSS Unset Value]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-unset-value

---
_Source: https://npm.io/package/@csstools/postcss-unset-value · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._