text: var unique = (function () {
    'use strict';
  
    /**
     * Completely random generation of unique strings
     * @param {Number} size Generate the length of a random string
     * @default 10
     * @returns {String} Randomly generated string
     */
    function unique(size) {
      size = size || 10;
  
      var r = function r() {
        return Math.random().toString(36).slice(2);
      };
  
      var result = r();
  
      while (result.length < size) {
        result += r();
      }
  
      return result.slice(0, size);
    }
  
    return unique;
  
  })();
  