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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
<div id="C">c
  <div id="B">b
    <div id="A">a</div>
  </div>
</div>
</body>
</html>
 
div{
  border: 1px solid ;
  margin: 20px;
}
 
//先捕获（true），再同一个绑定对象顺序，最后冒泡
​
A.addEventListener('click',function(){
  console.log('1a')
})
A.addEventListener('click',function(){
  console.log('2a,true')
},true)
B.addEventListener('click',function(){
  console.log('1b,true')
},true)
B.addEventListener('click',function(){
  console.log('2b')
})
C.addEventListener('click',function(){
  console.log('1c')
})
C.addEventListener('click',function(){
  console.log('2c')
})
C.addEventListener('click',function(){
  console.log('3c,true')
},true)
​
Output

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