代码实现
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,body{
width: 100%;
height:100%;
}
body{font-size:62.5%}
.nav{
width: 100%;height: 50px;
background-color: antiquewhite;
display: flex;
justify-content: center;
}
.page-header{
width: 1200px;
height: 100%;
/* background-color: aqua; */
display: flex;
justify-content:space-evenly;
list-style: none;
}
.page-header > .item{
padding: 10px 50px;
font-size: 18px;
text-align: center;
cursor: pointer;
position: relative;
}
.page-header > .item:hover{
background-color: #d0a554;
color: #333;
font-weight: 500;
}
.childern{
display: none;
position: absolute;
top: 50px;
left: 0;
list-style: none;
padding: 10px 20px;
background-color: bisque;
}
.childern > li{
line-height: 50px;
}
.childern > li:hover{
background-color: #f2f2f1;
color: #333;
}
</style>
</head>
<body>
<div class="nav">
<ul class="page-header">
<li class="item">首页</li>
<li class="item">文章
<ul class="childern">
<li>发表文章</li>
<li>我的文章</li>
<li>关注的文章</li>
<li>喜欢的文章</li>
</ul>
</li>
<li class="item">相册
<ul class="childern">
<li>我的相册</li>
<li>上传照片</li>
</ul>
</li>
<li class="item">消息
<ul class="childern">
<li>我的私信</li>
<li>我的留言</li>
</ul>
</li>
</ul>
</div>
<script>
let _lis = document.getElementsByClassName("item");
for(let i = 0;i < _lis.length;i++){
_lis[i].onmouseenter = function(){
let _childern = this.children[0];
_childern.style.display = "block";
}
_lis[i].onmouseenter = function(){
let _childern = _lis[i].getElementsByClassName("childern")
if(_childern.length > 0){
let c = _childern[0];
c.style.display = "block";
}
}
_lis[i].onmouseleave = function(){
let _childern = _lis[i].getElementsByClassName("childern")
if(_childern.length > 0){
let c = _childern[0];
c.style.display = "none";
}
}
}
</script>
</body>
</html>
网页效果
image.png
