lovecoding
/
VIP22


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    #div1{
      width: 300px;
      height: 300px;
      background: green;
    }
    #div2{
      height: 200px;
      width: 200px;
      background: red;
    }
    #div3{
      width: 100px;
      height: 100px;
      background: blue;
    }
  </style>
</head>

<body>
  <div id="div1">
    <div id="div2">
      <div id="div3">

      </div>
    </div>
  </div>
  <script>
    var div1 = document.getElementById('div1')
    var div2 = document.getElementById('div2')
    var div3 = document.getElementById('div3')
    // div1.onclick = function(){
    //   console.log('div1')
    // }
    // div2.onclick = function(){
    //   console.log('div2')
    //   //阻止事件冒泡
    //   event.stopPropagation()
    // }
    // div3.onclick = function(){
    //   console.log('div3')
    //   //阻止事件冒泡
    //   event.cancelBubble = true
    // }

    /* 
    参数一  事件名称 字符串 必填
    参数二  执行函数  必填
    参数三  触发类型  布尔值 可选 
    */
    div1.addEventListener('click',function(){
      console.log('div1')
    },false)
    div2.addEventListener('click',function(){
      console.log('div2')
    },false)
    div3.addEventListener('click',function(){
      console.log('div3')
    },false)
    div1.addEventListener('click',function(){
      console.log('div1')
    },true)
    div2.addEventListener('click',function(){
      console.log('div2')
    },true)
    div3.addEventListener('click',function(){
      console.log('div3')
    },true)
    /* 事件冒泡  从里到外  false*/
    /* 事件捕获  从外到里  true */
    /* 先捕获 后冒泡  先从外到里  然后从里到外 */
  </script>
</body>

</html>