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2024-09-27 02:06:13 +08:00
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历届学生/front-end-team-10/项目练习/学生项目/韩孟雪/2023-2-24/淘宝头部2.html Normal file
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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>淘宝头部定位2</title>
<style>
* {
margin: 0;
padding: 0;
list-style: none;
outline: none;
}
body {
height: 3000px;
background: rosybrown;
}
.header {
width: 100%;
height: 60px;
display: flex;
justify-content: center;
}
.header ul {
height: 100%;
display: flex;
margin-left: 10px;
}
.header li {
display: flex;
align-items: center;
}
.header input {
width: 600px;
height: 100%;
border-top-left-radius: 10px;
border-bottom-left-radius: 10px;
border: 1px solid #39bc30;
box-sizing: border-box;
background: white;
padding-left: 42px;
}
.header .btn {
width: 116px;
height: 100%;
background: #39bc30;
border-top-right-radius: 10px;
border-bottom-right-radius: 10px;
font-size: 16px;
font-weight: 700;
color: white;
display: flex;
align-items: center;
justify-content: center;
cursor: pointer;
user-select: none;
}
.test {
width: 100%;
height: 60px;
margin-bottom: 60px;
}
</style>
</head>
<body>
<div class="test"></div>
<div class="header">
<input type="text" placeholder="请输入内容">
<div class="btn">搜索</div>
<ul class="list">
<li>首页1</li>
<li>首页2</li>
<li>首页3</li>
<li>首页4</li>
</ul>
</div>
</body>
<script>
// 网页绑定滚动事件
//获取跟动的距离
// 大于某个值 给html固定定位，反之不加
var body = $("body"),
header = $(".header"),
test = $(".test"),
list = $(".list");
body.onscroll = () => {
var offsetTop = document.documentElement.scrollTop;
console.log("offsetTop:", offsetTop);
if (offsetTop > 60) {
// header.style = `
// position:"fixed"
// top:"0"
// background:"white"
// `
header.style.position = "fixed"
header.style.top = "0"
header.style.background = "white"
} else {
header.style.position = "static";
header.style.background = "red";
}
}
function $(className) {
return document.querySelector(className)
}
function _(className) {
return document.querySelectorAll(className)
}
</script>
</html>