lovecoding
/
VIP30


			
							1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192
							<!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: pink;
    }

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

    #div3 {
      width: 100px;
      height: 100px;
      background: green;
    }
  </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(e){
    //   console.log('div2')
    //   //阻止事件默认行为
    //   // e.preventDefault() //阻止不了
    //   //阻止事件冒泡
    //   e.stopPropagation()
    // }
    // div3.onclick = function(){
    //   console.log('div3')
    //   //阻止事件冒泡
    //   event.cancelBubble = true
    // }

    //事件冒泡 从里到外执行

    /* 
      参数1  事件名称 字符串  必填
      参数2  执行函数   必填
      参数3  布尔值
    */
    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)

    /* 
      从里到外 事件冒泡  false
      从外到里 事件捕获  true
      先捕获 后冒泡  先从外到里 然后从里到外
    */
  </script>
</body>

</html>