/**
 * @fileoverview Get event collection for specific HTML element
 * @author NHN FE Development Lab <dl_javascript@nhn.com>
 */

'use strict';

var EVENT_KEY = '_feEventKey';

/**
 * Get event collection for specific HTML element
 * @param {HTMLElement} element - HTML element
 * @param {string} type - event type
 * @returns {array}
 * @private
 */
function safeEvent(element, type) {
  var events = element[EVENT_KEY];
  var handlers;

  if (!events) {
    events = element[EVENT_KEY] = {};
  }

  handlers = events[type];
  if (!handlers) {
    handlers = events[type] = [];
  }

  return handlers;
}

module.exports = safeEvent;