CSS Deflating Logic

deflateCSS.js

function deflate(css) {
  // remove remark
  css = css.replace(/\/\*[\s\S]*?\*\//g, '');
  
  // uniform @import
  css = css
    .replace(/@import\s+url\(\s*"([^"]+)"\s*\)\s*;/g, '@import "$1";')
    .replace(/@import\s+url\(\s*\'([^\']+)\'\s*\)\s*;/g, '@import "$1";')
    .replace(/@import\s+url\(\s*([\S^\)]+)\s*\)\s*;/g, '@import "$1";')
    .replace(/@import\s*"([^"]+)"\s*;/g, '@import "$1";')
    .replace(/@import\s*\'([^\']+)\'\s*;/g, '@import "$1";');
    
  // uniform url()
  css = css
    .replace(/url\(\s*"([^"]+)"\s*\)/g, 'url($1)')
    .replace(/url\(\s*\'([^\']+)\'\s*\)/g, 'url($1)')
    .replace(/url\(\s*([\S^\)]+)\s*\)/g, 'url($1)');
    
  // remove excess space charactor
  css = css
    .replace(/\s/g, ' ')
    .replace(/ {2,}/g, ' ');
    
  css = css
    .replace(/ :/g, ':')
    .replace(/: /g, ':')
    .replace(/ ;/g, ';')
    .replace(/; /g, ';')
    .replace(/ ,/g, ',')
    .replace(/, /g, ',')
    .replace(/ {/g, '{')
    .replace(/{ /g, '{')
    .replace(/ }/g, '}')
    .replace(/} /g, '}')
    .replace(/:}/g, '}');
    
  css = css.replace(/(^\s*)|(\s*$)/g, '');
  
  return css;
}

http://blog.xuite.net/vexed/tech/65787397