Javascript 如何使导航栏在展开时滚动并固定到页面顶部?
当“我的导航栏”折叠时,滚动是正常的,当滚动到页眉/jumbotron上方时,导航栏将固定在页面顶部。但是,当导航栏展开时(显示“一”、“二”和“三”),页面将跳过部分内容并被导航栏覆盖。如何使页面滚动/正常运行,并允许扩展的导航栏固定在页面顶部,而不跳过下面的内容Javascript 如何使导航栏在展开时滚动并固定到页面顶部?,javascript,html,css,navbar,affix,Javascript,Html,Css,Navbar,Affix,当“我的导航栏”折叠时,滚动是正常的,当滚动到页眉/jumbotron上方时,导航栏将固定在页面顶部。但是,当导航栏展开时(显示“一”、“二”和“三”),页面将跳过部分内容并被导航栏覆盖。如何使页面滚动/正常运行,并允许扩展的导航栏固定在页面顶部,而不跳过下面的内容 <!DOCTYPE html> <html> <head> <title>Example</title> <meta charset="utf-8"
<!DOCTYPE html>
<html>
<head>
<title>Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://fonts.googleapis.com/css?family=Cabin" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet">
<script type="text/javascript">
</script>
<style>
.affix {
top: 0;
width: 100%;
}
.affix + .container-fluid {
padding-top: 70px;
}
nav {
z-index: 9;
}
.emoji p:hover {
text-decoration: none;
}
</style>
</head>
<body>
<div class="container-fluid" style="background-color:#f64e09; color:#fff; height:200px;">
<div class="container text-center" style="color: white;">
<div>
<h1 style="font-family: 'Lobster', cursive;">Website</h1> </div>
<h1 style="font-size: 30px; font-family: 'Cabin', sans-serif;">
</h1> </div>
</div>
<nav class="navbar navbar-inverse" data-spy="affix" data-offset-top="197">
<div class="container-fluid">
<div class="navbar-static-top">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a id="navId" class="navbar-brand" style="color:white;" href="#">Navbar Title</a> </div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="#">One</a> </li>
<li class="active"><a href="#">Two</a> </li>
<li><a href="#">Three</a> </li>
</ul>
</div>
</div>
</nav>
<!-- Start containter for everything south of navbar -->
<div class="container-fluid">
<div class="container" style="padding-top: 20px;">
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1> </div>
</div>
<div class="panel panel-default" style="font-family: 'Cabin', sans- serif;">
<div class="panel-footer">
<center>
<p>This is the footer</p>
</center>
</div>
</div>
</body>
</html>
例子
.粘贴{
排名:0;
宽度:100%;
}
.粘贴+.容器液体{
填充顶部:70px;
}
导航{
z指数:9;
}
.表情符号p:悬停{
文字装饰:无;
}
网站
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
这是页脚
您可能知道,当导航栏折叠时,内容没有“跳跃”的原因是这种样式:
.affix + .container-fluid {
padding-top: 70px;
}
但当您扩展导航栏时,填充保持不变,但导航栏本身会变得更高。因此,我们必须以某种方式区分这些情况
我们可以添加一些javascript
来向
元素添加一个额外的类:
<script type="text/javascript">
$(document).ready(function() {
var navBar = $('#myNavbar');
$('.navbar-toggle').click(function(e) {
if (!navBar.is(':visible')) {
// #myNavbar is about to be shown, add extra class to parent <nav>
navBar.parents('nav').addClass('affix-visible-navbar');
} else {
// #myNavbar is about to be hidden, remove extra class from parent <nav>
navBar.parents('nav').removeClass('affix-visible-navbar');
}
});
});
</script>
因此,完整的工作解决方案如下所示:
<!DOCTYPE html>
<html>
<head>
<title>Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://fonts.googleapis.com/css?family=Cabin" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet">
<script type="text/javascript">
</script>
<style>
.affix {
top: 0;
width: 100%;
}
.affix + .container-fluid {
padding-top: 70px;
}
.affix.affix-visible-navbar + .container-fluid {
padding-top: 155px !important;
}
nav {
z-index: 9;
}
.emoji p:hover {
text-decoration: none;
}
</style>
<script type="text/javascript">
$(document).ready(function() {
var navBar = $('#myNavbar');
$('.navbar-toggle').click(function(e) {
if (!navBar.is(':visible')) {
// #myNavbar is about to be shown, add extra class to parent <nav>
navBar.parents('nav').addClass('affix-visible-navbar');
} else {
// #myNavbar is about to be hidden, remove extra class from parent <nav>
navBar.parents('nav').removeClass('affix-visible-navbar');
}
});
});
</script>
</head>
<body>
<div class="container-fluid" style="background-color:#f64e09; color:#fff; height:200px;">
<div class="container text-center" style="color: white;">
<div>
<h1 style="font-family: 'Lobster', cursive;">Website</h1> </div>
<h1 style="font-size: 30px; font-family: 'Cabin', sans-serif;">
</h1> </div>
</div>
<nav class="navbar navbar-inverse" data-spy="affix" data-offset-top="197">
<div class="container-fluid">
<div class="navbar-static-top">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a id="navId" class="navbar-brand" style="color:white;" href="#">Navbar Title</a> </div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="#">One</a> </li>
<li class="active"><a href="#">Two</a> </li>
<li><a href="#">Three</a> </li>
</ul>
</div>
</div>
</nav>
<!-- Start containter for everything south of navbar -->
<div class="container-fluid">
<div class="container" style="padding-top: 20px;">
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1> </div>
</div>
<div class="panel panel-default" style="font-family: 'Cabin', sans- serif;">
<div class="panel-footer">
<center>
<p>This is the footer</p>
</center>
</div>
</div>
</body>
</html>
例子
.粘贴{
排名:0;
宽度:100%;
}
.粘贴+.容器液体{
填充顶部:70px;
}
.粘贴.粘贴-可见-导航条+.容器液体{
填充顶部:155px!重要;
}
导航{
z指数:9;
}
.表情符号p:悬停{
文字装饰:无;
}
$(文档).ready(函数(){
var-navBar=$(“#myNavbar”);
$('.navbar toggle')。单击(函数(e){
如果(!navBar.is(':visible')){
//#myNavbar即将显示,请向父级添加额外的类
navBar.parents('nav').addClass('affix-visible-navBar');
}否则{
//#myNavbar即将隐藏,请从父级中删除额外的类
navBar.parents('nav')。removeClass('affix-visible-navBar');
}
});
});
网站
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
内容,以便页面滚动
这是页脚
当然,如果您要更改
#myNavbar
元素(例如添加/删除项目),则必须调整.affix.affix-visible-navbar+.container fluid{}
中的填充,您可能知道,当navbar折叠时,您的内容没有“跳跃”的原因是这种样式:
.affix + .container-fluid {
padding-top: 70px;
}
但当您扩展导航栏时,填充保持不变,但导航栏本身会变得更高。因此,我们必须以某种方式区分这些情况
我们可以添加一些javascript
来向
元素添加一个额外的类:
<script type="text/javascript">
$(document).ready(function() {
var navBar = $('#myNavbar');
$('.navbar-toggle').click(function(e) {
if (!navBar.is(':visible')) {
// #myNavbar is about to be shown, add extra class to parent <nav>
navBar.parents('nav').addClass('affix-visible-navbar');
} else {
// #myNavbar is about to be hidden, remove extra class from parent <nav>
navBar.parents('nav').removeClass('affix-visible-navbar');
}
});
});
</script>
因此,完整的工作解决方案如下所示:
<!DOCTYPE html>
<html>
<head>
<title>Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://fonts.googleapis.com/css?family=Cabin" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet">
<script type="text/javascript">
</script>
<style>
.affix {
top: 0;
width: 100%;
}
.affix + .container-fluid {
padding-top: 70px;
}
.affix.affix-visible-navbar + .container-fluid {
padding-top: 155px !important;
}
nav {
z-index: 9;
}
.emoji p:hover {
text-decoration: none;
}
</style>
<script type="text/javascript">
$(document).ready(function() {
var navBar = $('#myNavbar');
$('.navbar-toggle').click(function(e) {
if (!navBar.is(':visible')) {
// #myNavbar is about to be shown, add extra class to parent <nav>
navBar.parents('nav').addClass('affix-visible-navbar');
} else {
// #myNavbar is about to be hidden, remove extra class from parent <nav>
navBar.parents('nav').removeClass('affix-visible-navbar');
}
});
});
</script>
</head>
<body>
<div class="container-fluid" style="background-color:#f64e09; color:#fff; height:200px;">
<div class="container text-center" style="color: white;">
<div>
<h1 style="font-family: 'Lobster', cursive;">Website</h1> </div>
<h1 style="font-size: 30px; font-family: 'Cabin', sans-serif;">
</h1> </div>
</div>
<nav class="navbar navbar-inverse" data-spy="affix" data-offset-top="197">
<div class="container-fluid">
<div class="navbar-static-top">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a id="navId" class="navbar-brand" style="color:white;" href="#">Navbar Title</a> </div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="#">One</a> </li>
<li class="active"><a href="#">Two</a> </li>
<li><a href="#">Three</a> </li>
</ul>
</div>
</div>
</nav>
<!-- Start containter for everything south of navbar -->
<div class="container-fluid">
<div class="container" style="padding-top: 20px;">
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1>
<h1>Content so the page scrolls</h1> </div>
</div>
<div class="panel panel-default" style="font-family: 'Cabin', sans- serif;">
<div class="panel-footer">
<center>
<p>This is the footer</p>
</center>
</div>
</div>
</body>
</html>
例子
.粘贴{
排名:0;
宽度:100%;
}
.粘贴+.容器液体{
填充顶部:70px;
}
.粘贴.粘贴-可见-导航条+.容器液体{
填充顶部:155px!重要;
}
导航{
z指数:9;
}
.表情符号p:悬停{
文字装饰:无;
}
$(文档).ready(函数(){
var-navBar=$(“#myNavbar”);
$('.navbar toggle')。单击(函数(e){
如果(!navBar.is(':visible')){
//#myNavbar即将显示,请向父级添加额外的类
navBar.parents('nav').addClass('affix-visible-navBar');
}否则{
//#myNavbar即将隐藏,请从父级中删除额外的类
navBar.parents('nav')。removeClass('affix-visible-navBar');
}
});
});
网站