How to use the cssstyle/lib/parsers.shorthandParser function in cssstyle

// cssstyle has matured enough that the hacks below are no longer
// necessary, so don't panic.
try {
  var cssPropertyParsers = require('cssstyle/lib/parsers');
} catch (err) {
  // This error probably just means cssstyle is not installed yet, because
  // we're still in the process of upgrading jsdom. Don't worry about it
  // until jsdom has been updated to the latest version (v0.8.x).
}

if (cssPropertyParsers) {
  // The shorthandParser function should never return a string, but it
  // does when given an empty string. Here we detect that case and make it
  // return an empty object instead, to work around bugs in later code
  // that assume the result of shorthandParser is always an object.
  var shorthandParser = cssPropertyParsers.shorthandParser;
  cssPropertyParsers.shorthandParser = function() {
    var result = shorthandParser.apply(this, arguments);
    return result === '' ? {} : result;
  };

  // Current versions of the cssstyle parseInteger function can't actually
  // handle string inputs.
  var badInt = cssPropertyParsers.parseInteger('5');
  if (badInt !== '5') {
    cssPropertyParsers.parseInteger = function parseInteger(val) {
      return String(parseInt(val, 10));
    };
  }

  // Current versions of the cssstyle parseNumber function can't actually
  // handle string inputs.

// necessary, so don't panic.
try {
  var cssPropertyParsers = require('cssstyle/lib/parsers');
} catch (err) {
  // This error probably just means cssstyle is not installed yet, because
  // we're still in the process of upgrading jsdom. Don't worry about it
  // until jsdom has been updated to the latest version (v0.8.x).
}

if (cssPropertyParsers) {
  // The shorthandParser function should never return a string, but it
  // does when given an empty string. Here we detect that case and make it
  // return an empty object instead, to work around bugs in later code
  // that assume the result of shorthandParser is always an object.
  var shorthandParser = cssPropertyParsers.shorthandParser;
  cssPropertyParsers.shorthandParser = function() {
    var result = shorthandParser.apply(this, arguments);
    return result === '' ? {} : result;
  };

  // Current versions of the cssstyle parseInteger function can't actually
  // handle string inputs.
  var badInt = cssPropertyParsers.parseInteger('5');
  if (badInt !== '5') {
    cssPropertyParsers.parseInteger = function parseInteger(val) {
      return String(parseInt(val, 10));
    };
  }

  // Current versions of the cssstyle parseNumber function can't actually
  // handle string inputs.
  var badNum = cssPropertyParsers.parseNumber('0.5');