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104 lines
2.9 KiB
Markdown
104 lines
2.9 KiB
Markdown
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# PostCSS Lab Function [<img src="https://postcss.github.io/postcss/logo.svg" alt="PostCSS Logo" width="90" height="90" align="right">][postcss]
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[![NPM Version][npm-img]][npm-url]
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[![CSS Standard Status][css-img]][css-url]
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[![Build Status][cli-img]][cli-url]
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[![Support Chat][git-img]][git-url]
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[PostCSS Lab Function] lets you use `lab`, `lch`, and `gray` color functions in
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CSS, following the [CSS Color] specification.
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```pcss
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:root {
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--firebrick: lab(40 56.6 39);
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--firebrick-a50: lch(40 68.8 34.5 / 50%);
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--gray-40: gray(40);
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--gray-40a50: gray(40 / .5);
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}
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/* becomes */
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:root {
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--firebrick: rgb(178, 34, 34);
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--firebrick-a50: rgba(178, 34, 34, .5);
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--gray-40: rgb(94,94,94);
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--gray-40a50: rgba(94,94,94, .5);
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}
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```
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## Usage
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Add [PostCSS Lab Function] to your project:
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```bash
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npm install postcss-lab-function --save-dev
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```
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Use [PostCSS Lab Function] to process your CSS:
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```js
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const postcssLabFunction = require('postcss-lab-function');
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postcssLabFunction.process(YOUR_CSS /*, processOptions, pluginOptions */);
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```
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Or use it as a [PostCSS] plugin:
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```js
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const postcss = require('postcss');
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const postcssLabFunction = require('postcss-lab-function');
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postcss([
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postcssLabFunction(/* pluginOptions */)
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]).process(YOUR_CSS /*, processOptions */);
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```
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[PostCSS Lab Function] 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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| --- | --- | --- | --- | --- | --- |
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## Options
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### preserve
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The `preserve` option determines whether the original functional color notation
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is preserved. By default, it is not preserved.
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```js
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postcssLabFunction({ preserve: true })
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```
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```pcss
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:root {
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--firebrick: lab(40 56.6 39);
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--firebrick-a50: lch(40 68.8 34.5 / 50%);
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}
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/* becomes */
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:root {
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--firebrick: rgb(178, 34, 34);
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--firebrick: lab(40 56.6 39);
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--firebrick-a50: rgba(178, 34, 34, .5);
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--firebrick-a50: lch(40 68.8 34.5 / 50%);
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}
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```
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[cli-img]: https://img.shields.io/travis/jonathantneal/postcss-lab-function.svg
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[cli-url]: https://travis-ci.org/jonathantneal/postcss-lab-function
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[css-img]: https://cssdb.org/badge/lab-function.svg
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[css-url]: https://cssdb.org/#lab-function
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[git-img]: https://img.shields.io/badge/support-chat-blue.svg
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[git-url]: https://gitter.im/postcss/postcss
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[npm-img]: https://img.shields.io/npm/v/postcss-lab-function.svg
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[npm-url]: https://www.npmjs.com/package/postcss-lab-function
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[CSS Color]: https://drafts.csswg.org/css-color/#specifying-lab-lch
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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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[PostCSS Lab Function]: https://github.com/jonathantneal/postcss-lab-function
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