/**
 * @fileoverview Get HTML element's design classes.
 * @author NHN FE Development Lab <dl_javascript@nhn.com>
 */

'use strict';

var isUndefined = require('../type/isUndefined');

/**
 * Get HTML element's design classes.
 * @param {(HTMLElement|SVGElement)} element target element
 * @returns {string} element css class name
 * @memberof module:domUtil
 */
function getClass(element) {
  if (!element || !element.className) {
    return '';
  }

  if (isUndefined(element.className.baseVal)) {
    return element.className;
  }

  return element.className.baseVal;
}

module.exports = getClass;