CSS unminify POC

bookmarklet.js

javascript:(function () { 'use strict';   function unminCSS(code, tab) { var tabSize = 4; var space = '';   if (typeof tab === 'string'){ tab = /^\d+$/.test(tab) ? parseInt(tab,10) : tabSize; };   if (typeof tab === 'undefined'){ tab = tabSize; }   if (tab < 0){ tab = tabSize; }   code = code .split('\t').join(' ') .replace(/\s*{\s*/g, ' {\n\u00a0') .replace(/;\s*/g, ';\n\u00a0') .replace(/,\s*/g, ',\u00a0') .replace(/[ ]*}\s*/g, '}\n') .replace(/\}\s*(.+)/g, '}\n$1') .replace(/\n ([^:]+):\s*/g, '\n $1:&nbsp;') .replace(/([A-z0-9\)])}/g, '$1;\n}');   if (tab !== 4) { for (;tab != 0;tab--) { space += '\u00a0'; } code = code.replace(/\n /g, '\n'+space) }   return code; }   document.body.innerText = unminCSS(document.body.innerText); })();

cssunmin.js

// CSS unminifier for Pavel
// partly-based on the css cssunminifier npm module
// regex should be mostly portable if not done in 
// the front-end

function unminCSS(code, tab) {
    var tabSize = 4;
    var space = '';

  if (typeof tab === 'string'){
        tab = /^\d+$/.test(tab) ? parseInt(tab,10) : tabSize;
  }

  if (typeof tab === 'undefined'){
        tab = tabSize;
  }

  if (tab < 0){
        tab = tabSize;
  }

    code = code
        .split('\t').join('    ')
        .replace(/\s*{\s*/g, ' {\n    ')
        .replace(/;\s*/g, ';\n    ')
        .replace(/,\s*/g, ', ')
        .replace(/[ ]*}\s*/g, '}\n')
        .replace(/\}\s*(.+)/g, '}\n$1')
        .replace(/\n    ([^:]+):\s*/g, '\n    $1: ')
        .replace(/([A-z0-9\)])}/g, '$1;\n}');

    if (tab != 4) {
      for (;tab != 0;tab--) { space += ' '; }
	    code = code.replace(/\n    /g, '\n'+space);
    }

    return code;
}


// usage
var testCSS =".paul{font:normal 14px/20px helvetica,arial,sans-serif;color:red;}.pavel{font-weight:bold;-webkit-transform:translateZ(0);}.tim{color:blue;font-size:60px;}";
console.log(unminCSS(testCSS));

/*
.paul {
    font: normal 14px/20px helvetica, arial;
    color: red;
}
.pavel {
    font-weight: bold;
    -webkit-transform: translateZ(0);
}
.tim {
    color: blue;
    font-size: 60px;
}
*/