What is postcss-selector-not?
The postcss-selector-not package is a PostCSS plugin that transforms :not() pseudo-class selectors to work with older browsers that do not support them. It helps in writing more maintainable and readable CSS by allowing the use of the :not() pseudo-class in a way that is compatible with a wider range of browsers.
What are postcss-selector-not's main functionalities?
Transform :not() pseudo-class
This feature transforms the :not() pseudo-class to a format that is compatible with older browsers. In this example, the CSS rule 'a:not(.foo) { color: red; }' is processed to ensure compatibility.
const postcss = require('postcss');
const selectorNot = require('postcss-selector-not');
const css = 'a:not(.foo) { color: red; }';
postcss([selectorNot]).process(css).then(result => {
console.log(result.css);
});
Other packages similar to postcss-selector-not
postcss-preset-env
postcss-preset-env allows you to use future CSS features today by converting modern CSS into something most browsers can understand. It includes a variety of plugins, including one that handles :not() pseudo-classes, making it a more comprehensive solution compared to postcss-selector-not.
postcss-nesting
postcss-nesting enables nesting of CSS rules, which can sometimes overlap with the use of :not() pseudo-classes for scoping styles. While it doesn't directly transform :not() selectors, it provides a different approach to writing maintainable CSS.
postcss-selector-not
PostCSS plugin to transform :not()
W3C CSS leve 4 pseudo class to :not() CSS level 3 selectors
http://dev.w3.org/csswg/selectors-4/#negation
Installation
$ npm install postcss-selector-not
Usage
var postcss = require("postcss")
var output = postcss()
.use(require("postcss-selector-not"))
.process(require("fs").readFileSync("input.css", "utf8"))
.css
Using this input.css
:
p:not(:first-child, .special) {
color: red;
}
you will get:
p:not(:first-child), p:not(.special) {
color: red;
}