【发布时间】:2021-01-07 16:56:18
【问题描述】:
我目前正在尝试在常规菜单栏下方实现一个粘性导航栏。
但是,当我向上滚动时,我的导航栏会覆盖我的菜单栏。有人可以帮我吗? :)
*/ #navbar {
overflow: hidden;
background-color: #333;
}
/* Navbar links */ #navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px;
text-decoration: none;
}
/* Page content */ .content {
padding: 16px;
}
/* The sticky class is added to the navbar with JS when it reaches its scroll position */ .sticky {
position: fixed;
top: 0;
z-index:999;
}
/* Add some top padding to the page content to prevent sudden quick movement (as the navigation bar gets a new position at the top of the page (position:fixed and top:0) */ .sticky + .content {
padding-top: 60px;
}
// When the user scrolls the page, execute myFunction
window.onscroll = function() {myFunction()};
// Get the navbar
var navbar = document.getElementById("navbar");
// Get the offset position of the navbar
var sticky = navbar.offsetTop;
// Add the sticky class to the navbar when you reach its scroll position. Remove "sticky" when you leave the scroll position
function myFunction() {
if (window.pageYOffset >= sticky) {
navbar.classList.add("sticky")
} else {
navbar.classList.remove("sticky");
}
}
<div id="navbar">
<a href="#home">Home</a>
<a href="#news">News</a>
<a href="#contact">Contact</a>
</div>
【问题讨论】: