捕捉模式从DOM最顶层一直到最后一层,冒泡正好相反,具体运行以下实例测试.
<!DOCTYPE html>
<html>
<head>
<title>捕捉和冒泡</title>
<meta charset="utf-8">
</head>
<body>
<style>
#china{
width:500px;
height: 500px;
}
div{
border: 1px solid #333;
width:80%;
height: 80%;
margin: 10%;
}
</style>
<div id="china">
我是中国区域
<div id="shanxi">
我是陕西区域
<div id="xian">
我是西安区域
</div>
</div>
</div>
<script>
//获取中国,陕西,西安三大对象
var china =document.getElementById('china');
var shanxi=document.getElementById('shanxi');
var xian =document.getElementById('xian');
//第三个参数,是否捕捉,默认值是false,不捕捉即默认为冒泡【目前是捕捉模式】
// china.addEventListener('click',function(){console.log('China')},true);
// shanxi.addEventListener('click',function(){console.log('Shanxi')},true);
// xian.addEventListener('click',function(){console.log('Xian')},true);
//第三个参数,是否捕捉,默认值是false,不捕捉即默认为冒泡【目前是冒泡模式】
china.addEventListener('click',function(){console.log('China')},false);
shanxi.addEventListener('click',function(){console.log('Shanxi')},false);
xian.addEventListener('click',function(){console.log('Xian')},false);
</script>
</body>
</html> 
