jQuery实现的监听导航滚动置顶状态功能示例
程序员文章站
2022-05-16 13:15:39
本文实例讲述了jquery实现的监听导航滚动置顶状态功能。分享给大家供大家参考，具体如下：
1. js代码
/**
* created by eduask...
本文实例讲述了jquery实现的监听导航滚动置顶状态功能。分享给大家供大家参考，具体如下：
1. js代码
/**
* created by eduask on 2016/5/20.
*/
$(function(){
//引入id标签;
var navtive=$("#native");
//设置导航标签为置顶;
var offsettop=navtive.offset().top;
//定义一个监听高度;
var scrollheight=$(document).scrolltop;
fn(navtive,offsettop);
//设置监听事件;
$(window).scroll(function(){
fn(navtive,offsettop);
});
//调用方法;
function fn(navtive,offsettop){
var scrollheight=$(document).scrolltop();
if(offsettop>scrollheight){
navtive.css("top",offsettop);
}else{
navtive.css("top",scrollheight);
}
}
});
2. html代码
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>监听导航滚动置顶</title>
<!--css样式;-->
<style type="text/css">
/*添加导航条的样式;
*/
#native{
background: blue;
width: 100%;
height: 20px;
color: red;
position: absolute;
top: 100px;
left: 0;
text-align: center;
}
</style>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript" src="监听导航滚动置顶.js">
</script>
</head>
<body>
<p id="top">ddddd</p>
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<div id="native">欢迎访问我的导航条</div>
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<a href="#top" rel="external nofollow" >回到顶部</a>
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</body>
</html>
感兴趣的朋友可以使用在线html/css/javascript代码运行工具：http://tools.jb51.net/code/htmljsrun测试运行效果。
更多关于jquery相关内容感兴趣的读者可查看本站专题：《jquery常见事件用法与技巧总结》、《jquery常用插件及用法总结》、《jquery操作json数据技巧汇总》、《jquery扩展技巧总结》、《jquery常见经典特效汇总》及《jquery选择器用法总结》
希望本文所述对大家jquery程序设计有所帮助。
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