What is postcss-unique-selectors?
The postcss-unique-selectors npm package is a PostCSS plugin that removes duplicate CSS selectors within a rule. This helps in optimizing the CSS by ensuring that each selector is unique, which can reduce the size of the CSS file and improve maintainability.
What are postcss-unique-selectors's main functionalities?
Remove duplicate selectors
This feature removes duplicate selectors within a CSS rule. In the provided code sample, the duplicate 'a' selector is removed, resulting in 'a, b { color: red; }'.
const postcss = require('postcss');
const uniqueSelectors = require('postcss-unique-selectors');
const css = 'a, a, b { color: red; }';
postcss([uniqueSelectors])
.process(css)
.then(result => {
console.log(result.css); // Output: 'a, b { color: red; }'
});
Other packages similar to postcss-unique-selectors
cssnano
cssnano is a modular minifier based on the PostCSS ecosystem. It includes a variety of optimizations, including the removal of duplicate selectors, making it a more comprehensive tool compared to postcss-unique-selectors.
postcss-discard-duplicates
postcss-discard-duplicates is another PostCSS plugin that removes duplicate rules and declarations. While it focuses on removing duplicate rules and declarations, it can be used in conjunction with postcss-unique-selectors for more thorough CSS optimization.