crass

crass can compress only CSS files.

https://github.com/mattbasta/crass

Usage

const minify = require('@node-minify/core');
const crass = require('@node-minify/crass');

minify({
  compressor: crass,
  input: 'foo.css',
  output: 'bar.css',
  callback: function(err, min) {}
});