lovecoding
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VIP30


			
				
					
						
						
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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>
    #div1 {
      width: 300px;
      height: 300px;
      background: red;
    }

    #div2 {
      width: 200px;
      height: 200px;
      background: green;
    }

    #div3 {
      width: 100px;
      height: 100px;
      background: pink;
    }
  </style>
</head>

<body>
  <div id="div1">
    <div id="div2">
      <div id="div3"></div>
    </div>
  </div>
  <script>
    /* js的事件流  从触发事件到处理时间的整个流程   包括事件捕获和事件冒泡 */
    var div1 = document.getElementById('div1')
    var div2 = document.getElementById('div2')
    var div3 = document.getElementById('div3')

    div1.addEventListener('click',function(){
      console.log('div1')
    },true)
    div2.addEventListener('click',function(){
      console.log('div2')
    },true)
    // div3.addEventListener('click',function(){
    //   console.log('div3')
    // },true)

    div3.onclick = function(){
      console.log('div3')
    }
  </script>
</body>

</html>