# PostCSS Selector Not [
][postcss]
[
][npm-url] [
][css-url] [
][cli-url] [
][discord]
[PostCSS Selector Not] transforms :not() W3C CSS level 4 pseudo classes to :not() CSS level 3 selectors following the [Selectors 4 Specification].
```pcss
p:not(:first-child, .special) {
color: red;
}
/* becomes */
p:not(:first-child):not(.special) {
color: red;
}
```
⚠️ Only lists of simple selectors (`:not(.a, .b)`) will work as expected.
Complex selectors (`:not(.a > .b, .c ~ .d)`) can not be downgraded.
## Usage
Add [PostCSS Selector Not] to your project:
```bash
npm install postcss postcss-selector-not --save-dev
```
Use it as a [PostCSS] plugin:
```js
const postcss = require('postcss');
const postcssSelectorNot = require('postcss-selector-not');
postcss([
postcssSelectorNot(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);
```
[PostCSS Selector Not] runs in all Node environments, with special
instructions for:
| [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) |
| --- | --- | --- | --- | --- | --- |
[cli-url]: https://github.com/csstools/postcss-plugins/actions/workflows/test.yml?query=workflow/test
[css-url]: https://cssdb.org/#not-pseudo-class
[discord]: https://discord.gg/bUadyRwkJS
[npm-url]: https://www.npmjs.com/package/postcss-selector-not
[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
[PostCSS Selector Not]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-selector-not
[Selectors 4 Specification]: https://www.w3.org/TR/selectors-4/#negation-pseudo