/*
 * @moduleName:
 * @Author: dawdler
 * @LastModifiedBy: dawdler
 * @Date: 2019-03-22 14:47:35
 * @LastEditTime: 2019-03-22 16:31:38
 */
export const on = (function() {
  if (document.addEventListener) {
    return function(element, event, handler) {
      if (element && event && handler) {
        element.addEventListener(event, handler, false)
      }
    }
  } else {
    return function(element, event, handler) {
      if (element && event && handler) {
        element.attachEvent('on' + event, handler)
      }
    }
  }
})()
export const off = (function() {
  if (document.removeEventListener) {
    return function(element, event, handler) {
      if (element && event) {
        element.removeEventListener(event, handler, false)
      }
    }
  } else {
    return function(element, event, handler) {
      if (element && event) {
        element.detachEvent('on' + event, handler)
      }
    }
  }
})()