From c06f7ee0a40255214c477e13d9b956a7e07c2900 Mon Sep 17 00:00:00 2001
From: littleblack111 <littleblack11111@gmail.com>
Date: Sat, 14 Oct 2023 15:05:55 +0800
Subject: postcss,(plugins): nanocss, postcss-preset-env

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+# PostCSS Stepped Value Functions [<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-stepped-value-functions.svg" height="20">][npm-url] [<img alt="CSS Standard Status" src="https://cssdb.org/images/badges/stepped-value-functions.svg" height="20">][css-url] [<img alt="Build Status" src="https://github.com/csstools/postcss-plugins/workflows/test/badge.svg" height="20">][cli-url] [<img alt="Discord" src="https://shields.io/badge/Discord-5865F2?logo=discord&logoColor=white">][discord]
+
+```bash
+npm install @csstools/postcss-stepped-value-functions --save-dev
+```
+
+[PostCSS Stepped Value Functions] lets you use `round`, `rem` and `mod` stepped value functions, following the [CSS Values 4].
+
+```pcss
+.test-functions {
+	padding: 8px mod(18px, 5px) 1px calc(rem(15px, 6px) + 50%);
+	transform: rotate(mod(-140deg, -90deg));
+	top: round(15px, 4px);
+	right: round(nearest, 15px, 4px);
+	bottom: round(up, 15px, 7px);
+	left: round(down, 15px, 4px);
+	width: round(to-zero, 15px, 4px);
+}
+
+/* becomes */
+
+.test-functions {
+	padding: 8px 3px 1px calc(3px + 50%);
+	transform: rotate(-50deg);
+	top: 16px;
+	right: 16px;
+	bottom: 21px;
+	left: 12px;
+	width: 12px;
+}
+```
+
+## Usage
+
+Add [PostCSS Stepped Value Functions] to your project:
+
+```bash
+npm install postcss @csstools/postcss-stepped-value-functions --save-dev
+```
+
+Use it as a [PostCSS] plugin:
+
+```js
+const postcss = require('postcss');
+const postcssSteppedValueFunctions = require('@csstools/postcss-stepped-value-functions');
+
+postcss([
+	postcssSteppedValueFunctions(/* pluginOptions */)
+]).process(YOUR_CSS /*, processOptions */);
+```
+
+[PostCSS Stepped Value Functions] runs in all Node environments, with special
+instructions for:
+
+- [Node](INSTALL.md#node)
+- [PostCSS CLI](INSTALL.md#postcss-cli)
+- [PostCSS Load Config](INSTALL.md#postcss-load-config)
+- [Webpack](INSTALL.md#webpack)
+- [Next.js](INSTALL.md#nextjs)
+- [Gulp](INSTALL.md#gulp)
+- [Grunt](INSTALL.md#grunt)
+
+## ⚠️ About custom properties
+
+Given the dynamic nature of custom properties it's impossible to know what the variable value is, which means the plugin can't compute a final value for the stylesheet. 
+
+Because of that, any usage that contains a `var` is skipped.
+
+## Options
+
+### preserve
+
+The `preserve` option determines whether the original notation
+is preserved. By default, it is not preserved.
+
+```js
+postcssSteppedValueFunctions({ preserve: true })
+```
+
+```pcss
+.test-functions {
+	padding: 8px mod(18px, 5px) 1px calc(rem(15px, 6px) + 50%);
+	transform: rotate(mod(-140deg, -90deg));
+	top: round(15px, 4px);
+	right: round(nearest, 15px, 4px);
+	bottom: round(up, 15px, 7px);
+	left: round(down, 15px, 4px);
+	width: round(to-zero, 15px, 4px);
+}
+
+/* becomes */
+
+.test-functions {
+	padding: 8px 3px 1px calc(3px + 50%);
+	padding: 8px mod(18px, 5px) 1px calc(rem(15px, 6px) + 50%);
+	transform: rotate(-50deg);
+	transform: rotate(mod(-140deg, -90deg));
+	top: 16px;
+	top: round(15px, 4px);
+	right: 16px;
+	right: round(nearest, 15px, 4px);
+	bottom: 21px;
+	bottom: round(up, 15px, 7px);
+	left: 12px;
+	left: round(down, 15px, 4px);
+	width: 12px;
+	width: round(to-zero, 15px, 4px);
+}
+```
+
+[cli-url]: https://github.com/csstools/postcss-plugins/actions/workflows/test.yml?query=workflow/test
+[css-url]: https://cssdb.org/#stepped-value-functions
+[discord]: https://discord.gg/bUadyRwkJS
+[npm-url]: https://www.npmjs.com/package/@csstools/postcss-stepped-value-functions
+
+[PostCSS]: https://github.com/postcss/postcss
+[PostCSS Stepped Value Functions]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-stepped-value-functions
+[CSS Values 4]: https://www.w3.org/TR/css-values-4/#round-func
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