Question

我目前正在尝试在常规菜单栏下方实施粘性导航栏。

然而，当我向上滚动时，我的导航栏覆盖了我的菜单栏。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>

Answer 1

使用位置：粘性。

.sticky {
   position:sticky;
}

看这个例子：https://www.w3schools.com/howto/howto_css_sticky_element.asp

Answer 2

我认为您无需使用 javascript 即可实现这一目标。这是我使用 html 和内联 css 所做的：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://kit.fontawesome.com/7b7972335d.js" crossorigin="anonymous"></script>
</head>
<body>
    <div style="background-color: yellow;padding: 20px;">Menu bar</div>
    <div style="background-color: greenyellow;padding: 20px;position: sticky;top:0">Navigation bar</div>
    <div style="background-color: orange;padding: 20px;height: 100vh;">PAge body</div>
</body>
</html>

除非您要实现某些特定目标，否则使导航栏具有粘性并将位置设置为顶部应该可以解决此问题

常规菜单下方的 HTML 粘性导航栏

2 个答案: