text: module.exports = function() {
    // Thanks David Walsh
    var styles = window.getComputedStyle(document.documentElement, ''),
    pre = (Array.prototype.slice
          .call(styles)
          .join('')
          .match(/-(moz|webkit|ms)-/) || (styles.OLink === '' && ['', 'o'])
        )[1];
    return '-' + pre + '-';
  };
  