focus事件
慕佑运
focus是在input中获取焦点的,但是在div中没有这个属性,所以要在div中加tabindex="0",div就可以使用focus属性了
<!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>
<style>
.child {
display: none;
}
.cg:focus .child {
display: block;
}
</style>
</head>
<body>
<div class="cg" tabindex="0">采购
<div class="child">
<a href="">产品</a>
<a href="">企业</a>
</div>
</div>
</body>
</html>
类似资料：