js 事件

‘use strict‘;
var arr = [document, window, document.documentElement, document.body, document.querySelector(‘.container‘)];
while (arr.length){
  var e = arr.pop(arr);
  !function(e){
    if (e.addEventListener){
      e.addEventListener(‘click‘, function (event) {console.log(e.constructor.name);});
    }else{
      e.attachEvent(‘onclick‘, function (event) {console.log(e.constructor.name);});
    }
  }(e)
}