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118 lines
2.8 KiB
118 lines
2.8 KiB
# PostCSS Unset Value [<img src="https://postcss.github.io/postcss/logo.svg" alt="PostCSS Logo" width="90" height="90" align="right">][postcss] |
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[<img alt="npm version" src="https://img.shields.io/npm/v/@csstools/postcss-unset-value.svg" height="20">][npm-url] |
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[<img alt="CSS Standard Status" src="https://cssdb.org/images/badges/unset-value.svg" height="20">][css-url] |
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[<img alt="Build Status" src="https://github.com/csstools/postcss-plugins/workflows/test/badge.svg" height="20">][cli-url] |
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[<img alt="Discord" src="https://shields.io/badge/Discord-5865F2?logo=discord&logoColor=white">][discord] |
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[PostCSS Unset Value] lets you use the unset keyword, following the [CSS Cascading and Inheritance] specification. |
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```pcss |
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.color { |
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color: unset; |
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} |
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.border-color { |
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border-color: unset; |
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} |
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.margin { |
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margin: unset; |
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} |
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/* becomes */ |
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.color { |
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color: inherit; |
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} |
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.border-color { |
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border-color: initial; |
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} |
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.margin { |
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margin: initial; |
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} |
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``` |
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## Usage |
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Add [PostCSS Unset Value] to your project: |
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```bash |
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npm install postcss @csstools/postcss-unset-value --save-dev |
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``` |
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Use it as a [PostCSS] plugin: |
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```js |
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const postcss = require('postcss'); |
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const postcssUnsetValue = require('@csstools/postcss-unset-value'); |
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postcss([ |
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postcssUnsetValue(/* pluginOptions */) |
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]).process(YOUR_CSS /*, processOptions */); |
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``` |
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[PostCSS Unset Value] runs in all Node environments, with special |
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instructions for: |
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| [Node](INSTALL.md#node) | [PostCSS CLI](INSTALL.md#postcss-cli) | [Webpack](INSTALL.md#webpack) | [Create React App](INSTALL.md#create-react-app) | [Gulp](INSTALL.md#gulp) | [Grunt](INSTALL.md#grunt) | |
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## Options |
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### preserve |
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The `preserve` option determines whether the original source |
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is preserved. By default, it is not preserved. |
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```js |
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postcssUnsetValue({ preserve: true }) |
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``` |
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```pcss |
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.color { |
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color: unset; |
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} |
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.border-color { |
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border-color: unset; |
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} |
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.margin { |
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margin: unset; |
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} |
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/* becomes */ |
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.color { |
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color: inherit; |
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color: unset; |
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} |
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.border-color { |
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border-color: initial; |
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border-color: unset; |
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} |
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.margin { |
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margin: initial; |
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margin: unset; |
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} |
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``` |
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[postcss]: https://github.com/postcss/postcss |
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[cli-url]: https://github.com/csstools/postcss-plugins/actions/workflows/test.yml?query=workflow/test |
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[css-url]: https://cssdb.org/#unset-value |
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[discord]: https://discord.gg/bUadyRwkJS |
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[npm-url]: https://www.npmjs.com/package/@csstools/postcss-unset-value |
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[Gulp PostCSS]: https://github.com/postcss/gulp-postcss |
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[Grunt PostCSS]: https://github.com/nDmitry/grunt-postcss |
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[PostCSS]: https://github.com/postcss/postcss |
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[PostCSS Loader]: https://github.com/postcss/postcss-loader |
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[CSS Cascading and Inheritance]: https://www.w3.org/TR/css-cascade-4/#inherit-initial |
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[PostCSS Unset Value]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-unset-value
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