<div id="parent" onclick="checkCookie()">
    <div class="child" id="child"></div>
  </div>
    document.getElementById(‘parent‘).addEventListener(‘click‘,function(e){
      console.log(e)
      console.log(this.id + ‘被觸發‘)

    },true);
    document.getElementById(
 
‘child‘).addEventListener(‘click‘, function(e){
      console.log(e)
      console.log(this.id + ‘被觸發‘)
    },true
    )

事件冒泡：4-7

事件捕獲：1-4

https://www.cnblogs.com/Chen-XiaoJun/p/6210987.html

事件冒泡，事件捕獲和事件委托