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postcss-unique-selectors
Advanced tools
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.
postcss-unique-selectors
Ensure CSS selectors are unique.
Install
With npm do:
npm install postcss-unique-selectors --save
Example
Selectors are sorted naturally, and deduplicated:
Input
h1,h3,h2,h1 {
color: red
}
Output
h1,h2,h3 {
color: red
}
Usage
See the PostCSS documentation for examples for your environment.
Contributors
See CONTRIBUTORS.md.
License
MIT © Ben Briggs
Keywords
FAQs
Ensure CSS selectors are unique.
The npm package postcss-unique-selectors receives a total of 10,389,214 weekly downloads. As such, postcss-unique-selectors popularity was classified as popular.
We found that postcss-unique-selectors demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 8 open source maintainers collaborating on the project.
Package last updated on 06 May 2025
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