// isPreposition.js

(function () {
  /* global adventurejs A */

  var p = adventurejs.Dictionary.prototype;

  /**
   * Determine whether string is recognized as a preposition.
   * @memberOf adventurejs.Dictionary
   * @method adventurejs.Dictionary#isPreposition
   * @kind function
   * @param {String} word
   * @returns {String|Boolean}
   */
  p.isPreposition = function Dictionary_isPreposition(word) {
    return this.prepositions.includes(word);
  };
})();