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.
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);
});