jquery.get-classlist.js: jQuery オブジェクトの最初のインデックスとなる要素ノードから classList (HTML5規定) を得る jQuery plugin

jquery.get-classlist.js

/**
 * jquery.get-classlist.js
 * get a classList of first index's jQuery object.
 *
 * @version 1.0
 * @author think49
 * @url https://gist.github.com/think49/c382098fedd9ae7c6661
 * @license http://www.opensource.org/licenses/mit-license.php (The MIT License)
 */

jQuery.fn.getClassList = function getClassList () {
  var element;

  if (this.length < 1) {
    return [];
  }

  element = this[0];

  return 'classList' in element ? element.classList : element.className.split(/\s+/);
};