事件捕获_事件冒泡

就是事件冒泡和事件捕获的demo了,很简单的

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
.p{
	width:500px;
	height:500px;
	background:#CCF;
}
.s{
	width:300px;
	height:300px;
	background:#fff;
}
.min{
	width:100px;
	height:100px;
	background:#063;
}
</style>
</head>
<body>
<div class="p">
	<div class="s">
    	<div class="min"></div>
    </div>
</div>
<script>
 window.alert = function (msg) {
	console.log(msg);
  };
  var p = document.getElementsByClassName('p')[0];
  var s = document.getElementsByClassName('s')[0];
  p.addEventListener('click', function (e) {
	alert( (e.target === e.currentTarget) + ' '+ e.eventPhase)
	alert('父节点捕获11');
  }, true);
  p.addEventListener('click', function (e) {
	alert( (e.target === e.currentTarget) + ' '+ e.eventPhase)
	alert('父节点冒泡')
  }, false);
  
  s.addEventListener('click', function (e) {
	alert( (e.target === e.currentTarget) + ' '+ e.eventPhase)
	alert('子节点捕获11');
  }, true);
  s.addEventListener('click', function (e) {
	alert( (e.target === e.currentTarget) + ' '+ e.eventPhase)
	alert('子节点冒泡')
  }, false);
  /*e.target时指向当前目标,e.currentTarget是指向点击的this*/
</script>
</body>
</html>

  

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