npmpackage.info

Gathering detailed insights and metrics for postcss-csso

postcss-csso

PostCSS plugin to minify CSS using CSSO

6.0.1

120

MIT

JavaScript

16.89 kB

2.8

Installations

npm install postcss-csso

Developer Guide

BETA

Typescript

No

Module System

ESM

Min. Node Version

^12.20.0 || ^14.13.0 || >=15.0.0

Node Version

18.7.0

NPM Version

8.15.0 Pull Requests

Open

3

Total

12

Closed

7

Merged

2

Issues

Open

5

Total

21

Closed

16

Releases

6.0.1

v6.0.1

Updated on Aug 11, 2022

6.0.0

v6.0.0

Updated on Dec 15, 2021

5.0.1

v5.0.1

Updated on Apr 05, 2021

5.0.0 Migrate to PostCSS 8.0

v5.0.0

Updated on Oct 05, 2020

4.0.0

v4.0.0

Updated on Nov 02, 2019

3.0.0

v3.0.0

Updated on Oct 12, 2017

View All 12 releases

Languages

JavaScript

JavaScript (100%)

Developer

lahmatiy

Download Statistics

Total Downloads

Last Day

Last Week

Last Month

Last Year

GitHub Statistics

MIT License

120 Stars

76 Commits

6 Forks

2 Watchers

3 Branches

3 Contributors

Updated on Jun 25, 2025

Maintainers

View All 3 Contributors

Package Meta Information

Latest Version

6.0.1

Package Id

postcss-csso@6.0.1

Unpacked Size

16.89 kB

Size

4.07 kB

File Count

NPM Version

8.15.0

Node Version

18.7.0

Total Downloads

Cumulative downloads

Total Downloads

NaN

Last Day

NaN

Compared to previous day

Last Week

NaN

Compared to previous week

Last Month

NaN

Compared to previous month

Last Year

NaN

Compared to previous year

Weekly Downloads

Monthly Downloads

Yearly Downloads

postcss-csso

PostCSS plugin to minify CSS using CSSO (a CSS minifier with structural optimizations).

Under the hood, the plugin converts PostCSS AST into CSSO's AST, optimises it and converts back. The plugin uses PostCSS's input AST nodes (or their clones) on back convertation, so the shape of the original PostCSS's nodes is preserved after the compression in most cases (e.g. properties added by other plugins aren't lost). This approach makes it possible to achieve great performance and correct source maps generation.

The performance of postcss-csso is approximately the same as CSSO has itself (see CSSO numbers in minifiers comparison table).

If you have any difficulties with the output of this plugin, please use the CSSO tracker.

Install

npm install postcss-csso

Usage

1import postcss from 'postcss';
2import csso from 'postcss-csso';
3// CommonJS:
4// const csso = require('postcss-csso');
5
6postcss([    csso])
7    .process('.a { color: #FF0000; } .b { color: rgba(255, 0, 0, 1) }')
8    .then((result) => {
9        console.log(result.css);
10        // .a,.b{color:red}
11    });

Plugin takes the same options as compress() method of CSSO with no exception.

1postcss([
2    csso({ restructure: false })
3])
4    .process('.a { color: #FF0000; } .b { color: rgba(255, 0, 0, 1) }')
5    .then((result) => {
6        console.log(result.css);
7        // .a{color:red}.b{color:red}
8    });

Using in postcss.config.js:

1import csso from 'postcss-csso';
2
3export const plugins = [
4    csso({
5        restructure: false
6    })
7];

License

MIT

No vulnerabilities found.

10

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

License

Determines if the project has defined a license.

4

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

0

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

0

Maintained

Determines if the project is "actively maintained".

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

0

Security-Policy

Determines if the project has published a security policy.

0

Fuzzing

Determines if the project uses fuzzing.

0

Branch-Protection

Determines if the default and release branches are protected with GitHub's branch protection settings.

0

SAST

Determines if the project uses static code analysis.

0

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

Score

2.8

/10

Last Scanned on 2025-07-07

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

Learn More

Other packages similar to postcss-csso

Other packages similar to postcss-csso

postcss-csso

Installations

Developer Guide

No

ESM

^12.20.0 || ^14.13.0 || >=15.0.0

18.7.0

8.15.0

Pull Requests

3

12

7

2

Issues

5

21

16

Releases

Languages

Developer

lahmatiy

Download Statistics

GitHub Statistics

Maintainers

Package Meta Information

Total Downloads

NaN

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

Peer Dependencies

Dev Dependencies

postcss-csso

Install

Usage

License

10

10

10

4

0

0

0

0

0

0

0

0

0

2.8

/10