PostCSS Mixins [][PostCSS]

npm install @csstools/postcss-mixins --save-dev

[PostCSS Mixins] lets you use @mixin and @apply following [CSS Mixins 1].

Several specification aspects of CSS Mixins still need to be settled.
This plugin is only a partial implementation to avoid conflicts with the final specification.

Unsupported:
- mixin arguments
- @contents blocks
- @result blocks
- layered @mixin declarations
- mixin overrides

``css
@mixin --foo() {
color: green;
}

.foo {
@apply --foo;
}

/ becomes /

.foo {
color: green;
}
`

Usage

Add [PostCSS Mixins] to your project:

`bash
npm install postcss @csstools/postcss-mixins --save-dev
`

Use it as a [PostCSS] plugin:

`js
const postcss = require('postcss');
const postcssMixins = require('@csstools/postcss-mixins');

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

Options

$3

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

`js
postcssMixins({ preserve: true })
`

`css
@mixin --foo() {
color: green;
}

.foo {
@apply --foo;
}

/ becomes /

@mixin --foo() {
color: green;
}

.foo {
color: green;
@apply --foo;
}
``

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

[PostCSS]: https://github.com/postcss/postcss
[PostCSS Mixins]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-mixins
[CSS Mixins 1]: https://drafts.csswg.org/css-mixins/#mixin-rule