CSS compressor

css-compressor.js

var compressCSS = function(css) {
  return css.trim()
    .replace(/\s*([{}:;,>+~])\s*/g, '$1') // whitespace
    .replace(/;}/g, '}') // trailing semicolons
    .replace(/#(\w)\1(\w)\2(\w)\3\b/g, '#$1$2$3') // hex colors
    .replace(/(\[[^=]+=)("|')([^"'\s]+)(\2)(\])/g, '$1$3$5') // useless attribute selector quotes
    .replace(/\(('|")([^"'\s]+)(\1)\)/g, '($2)') // useless function quotes
}