2018年6月22日(4.事件冒泡)

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>title</title>
  <style>
    #dv1{
      width: 300px;
      height: 200px;
      background-color: red;
    }
    #dv2{
      width: 250px;
      height: 150px;
      background-color: green;
    }
    #dv3{
      width: 200px;
      height: 100px;
      background-color: blue;
    }
  </style>

  <script>

</script>

</head>
<body>
<div id="dv1">
  <div id="dv2">
    <div id="dv3"></div>
  </div>
</div>



<script>


 document.getElementById("dv1").onclick = function(){

console.log(this.id);

}

document.getElementById("dv2").onclick = function(){

console.log(this.id);

//阻止事件冒泡

window.event.cancelBubble = true;

};

//第二种阻止事件冒泡的方式

document.getElementById("dv3").onclick = function(){

console.log(this.id);

//阻止事件冒泡

e.stopPropagation();

console.log(e);

}


</script>


</body>

</html>


2.阻止事件冒泡的二种方式

第一种:window.event.cancelBubble = true;


第二种:e.stopPropagation();

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转载自blog.csdn.net/qq_37771631/article/details/80778069