事件捕获和冒泡.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>事件捕获和冒泡</title>
</head>
<body>
<div class="cl">
<ul>
<li><a href="#">点我</a></li>
</ul>
</div>
<script>
function getTag(tagName){
return document.getElementsByTagName(tagName)[0]
};
getTag('ul').addEventListener('click',function(event){
console.log('ul')
});
getTag('li').addEventListener('click',function(event){
console.log('li')
});
getTag('a').addEventListener('click',function(event){
console.log('a')
});
getTag('div').addEventListener('click',function(event){
console.log('div')
});
<!-- 捕获
getTag('ul').addEventListener('click',function(event){
console.log('ul')
},true);
getTag('li').addEventListener('click',function(event){
console.log('li')
},true);
getTag('a').addEventListener('click',function(event){
console.log('a')
},true);
getTag('div').addEventListener('click',function(event){
console.log('div')
},true); -->
</script>
</body>
</html>