我试图像这样使用Sticky Navigation:https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_navbar_sticky
但也让它像这样的移动响应:https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_topnav
提前谢谢你的回复......
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}
function myFunction2() {
if (window.pageYOffset >= sticky) {
navbar.classList.add("sticky")
} else {
navbar.classList.remove("sticky");
}
}
body {
margin: 0;
font-size: 28px;
font-family: Arial, Helvetica, sans-serif;
}
.header {
background-color: #f1f1f1;
padding: 30px;
text-align: center;
}
#navbar {
overflow: hidden;
background-color: #333;
}
#navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
#navbar a:hover {
background-color: #ddd;
color: black;
}
#navbar a.active {
background-color: #4CAF50;
color: white;
}
.content {
padding: 16px;
}
.sticky {
position: fixed;
top: 0;
width: 100%;
}
.sticky + .content {
padding-top: 60px;
}
.navbar {
overflow: hidden;
background-color: #333;
}
.navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background-color: #ddd;
color: black;
}
.active {
background-color: #4CAF50;
color: white;
}
.navbar .icon {
display: none;
}
@media screen and (max-width: 600px) {
.navbar a:not(:first-child) {display: none;}
.navbar a.icon {
float: right;
display: block;
}
}
@media screen and (max-width: 600px) {
.navbar.responsive {position: relative;}
.navbar.responsive .icon {
position: absolute;
right: 0;
top: 0;
}
.navbar.responsive a {
float: none;
display: block;
text-align: left;
}
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<div class="header">
<h2>Scroll Down</h2>
<p>Scroll down to see the sticky effect.</p>
</div>
<div class="navbar" id="mynavbar">
<a class="active" href="javascript:void(0)">Home</a>
<a href="javascript:void(0)">News</a>
<a href="javascript:void(0)">Contact</a>
<a href="javascript:void(0);" class="icon" onclick="myFunction()">
<i class="fa fa-bars"></i>
</a>
</div>
<div class="content">
<h3>Sticky Navigation Example</h3>
<p>The navbar will stick to the top when you reach its scroll position.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
</div>
</body>
</html>
您只需使用jquery即可完成此操作,请参阅下面的代码。取得div的偏移,直到导航栏需要是静态的,然后它将是粘性的。
var fixmeTop = $('div#mynavbar').offset().top;
$(window).scroll(function(){
var currentScroll = $(window).scrollTop(); // get current position
if (currentScroll >= fixmeTop) { // apply position: fixed if you
$('div#mynavbar').css({ // scroll to that element or below it
position: 'fixed',
top: '0',
left: '0'
});
} else { // apply position: static
$('div#mynavbar').css({ // if you scroll above it
position: 'static'
});
}
});
body {
margin: 0;
font-size: 28px;
font-family: Arial, Helvetica, sans-serif;
}
.header {
background-color: #f1f1f1;
padding: 30px;
text-align: center;
}
#navbar {
overflow: hidden;
background-color: #333;
}
#navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
#navbar a:hover {
background-color: #ddd;
color: black;
}
#navbar a.active {
background-color: #4CAF50;
color: white;
}
.content {
padding: 16px;
}
.sticky {
position: fixed;
top: 0;
width: 100%;
}
.sticky + .content {
padding-top: 60px;
}
.navbar {
overflow: hidden;
background-color: #333;
}
.navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background-color: #ddd;
color: black;
}
.active {
background-color: #4CAF50;
color: white;
}
.navbar .icon {
display: none;
}
div#mynavbar {
width: 100%;
}
@media screen and (max-width: 600px) {
.navbar a:not(:first-child):not(:last-child) {display: none;}
.navbar a.icon {
float: right;
display: block;
}
}
@media screen and (max-width: 600px) {
.navbar.responsive {position: relative;}
.navbar.responsive .icon {
position: absolute;
right: 0;
top: 0;
}
.navbar.responsive a {
float: none;
display: block;
text-align: left;
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<body>
<div class="header">
<h2>Scroll Down</h2>
<p>Scroll down to see the sticky effect.</p>
</div>
<div class="navbar" id="mynavbar">
<a class="active" href="javascript:void(0)">Home</a>
<a href="javascript:void(0)">News</a>
<a href="javascript:void(0)">Contact</a>
<a href="javascript:void(0);" class="icon" onclick="myFunction()">
<i class="fa fa-bars"></i>
</a>
</div>
<div class="content">
<h3>Sticky Navigation Example</h3>
<p>The navbar will stick to the top when you reach its scroll position.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
<p>Some text to enable scrolling.. Lorem ipsum dolor sit amet, illum definitiones no quo, maluisset concludaturque et eum, altera fabulas ut quo. Atqui causae gloriatur ius te, id agam omnis evertitur eum. Affert laboramus repudiandae nec et. Inciderint efficiantur his ad. Eum no molestiae voluptatibus.</p>
</div>
</body>
</html>