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29 lines (29 loc) · 810 Bytes
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<!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>
</head>
<body>
<ul>
<li>这是第1个li</li>
<li>这是第2个li</li>
<li>这是第3个li</li>
<li>这是第4个li</li>
<li>这是第5个li</li>
</ul>
<script>
//使用事件委托的方法去实现 点击li给li变色
const ul = document.querySelector('ul')
ul.addEventListener('click',function(e){
console.dir(e.target)
//如果点击的标签名称是LI
if(e.target.tagName==="LI"){
e.target.style.color='red'
}
})
</script>
</body>
</html>