cssnano
Use this skill when the user wants to optimize and minify CSS for production — reduce file size, merge rules, drop duplicates, and compress colors via PostCSS.
Source facts
- Repository
- javimosch/supercli
- Last source activity
- May 22, 2026 at 22:09
- Detected SKILL.md language
- English
- Stars
- 51
- Forks
- 7
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Source instructions · Read-only preview- name
- cssnano
- description
- Use this skill when the user wants to optimize and minify CSS for production — reduce file size, merge rules, drop duplicates, and compress colors via PostCSS.
# cssnano Plugin
cssnano minifies and optimizes CSS using PostCSS plugins. Reduces file size by removing whitespace, merging rules, and normalizing values.
## Commands
- `cssnano _ _ <args>` — Passthrough
## Usage Examples
- "minify styles.css to styles.min.css"
- "optimize all CSS files in a directory"
- "preview optimization results without writing"
- "merge multiple CSS files and optimize"
## Installation
```bash
npm install -g cssnano
```
## Key Features
- Whitespace and comment removal
- Rule merging and consolidation
- Duplicate selector elimination
- Color compression and normalization
- Value optimization (z-index, calc, etc.)
- Font-face and keyframe deduplication
- PostCSS plugin ecosystem support
- Configurable optimization presets
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