这是我的 HTML 文件:
.jumbotron {
font-size: 20px;
padding: 60px;
background-color: #00a8ec;
text-align: center;
color: white;
}
header {
display: inline;
}
nav {
background-color: #00b2a6;
padding: 5px;
position: sticky;
top: 0;
}
footer {
padding: 20px;
color: white;
background-color: #00b2a6;
text-align: center;
font-weight: bold;
}<!DOCTYPE html>
<html>
<head>
<title>TITLE</title>
<link rel="stylesheet" href="tes.css">
</head>
<body>
<header>
<div class="jumbotron">
<h1>TITLE</h1>
<p>DESCRIPTION</p>
</div>
<nav>
<ul>
<li><a href="#sejarah">Sejarah</a></li>
<li><a href="#geografis">Geografis</a></li>
<li><a href="#wisata">Wisata</a></li>
</ul>
</nav>
</header>
<main>
<div id="content">
<pre>Hahahaha
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</pre>
</div>
<footer>
<p>FOOTER</p>
</footer>
</body>
</html>我仍然不明白为什么我的粘性导航只有在我使用 display:inline 在 HTML 中设置标题项时才有效？如果我删除该属性，粘性导航将不再起作用。
我在学习HTML和CSS方面遇到了困难，非常感谢您的支持!
最佳答案
您找到了一个可以强制其工作的 hack。当使用 inline 时，你将在 inline level 元素中有 block 级元素，这是 invalid 并且它就像 inline 元素不再存在(这是一个简化的解释，实际上它是有点复杂1)。
你的代码就像没有标题一样:
.jumbotron {
font-size: 20px;
padding: 60px;
background-color: #00a8ec;
text-align: center;
color: white;
}
nav {
background-color: #00b2a6;
padding: 5px;
position: sticky;
top: 0;
}
footer {
padding: 20px;
color: white;
background-color: #00b2a6;
text-align: center;
font-weight: bold;
}<div class="jumbotron">
<h1>TITLE</h1>
<p>DESCRIPTION</p>
</div>
<nav>
<ul>
<li><a href="#sejarah">Sejarah</a></li>
<li><a href="#geografis">Geografis</a></li>
<li><a href="#wisata">Wisata</a></li>
</ul>
</nav>
<main>
<div id="content">
<pre>Hahahaha
Hahahaha
Hahahaha
Hahahaha
Hahahaha
Hahahaha
Hahahaha
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</pre>
</div>
<footer>
<p>FOOTER</p>
</footer>如果将它包裹在另一个容器中，Sticky 将不起作用。它需要直接放在你体内有长内容的地方。
使用header时，加border理解问题:
.jumbotron {
font-size: 20px;
padding: 60px;
background-color: #00a8ec;
text-align: center;
color: white;
}
header {
border:5px solid red;
}
nav {
background-color: #00b2a6;
padding: 5px;
position: sticky;
top: 0;
}
footer {
padding: 20px;
color: white;
background-color: #00b2a6;
text-align: center;
font-weight: bold;
}<header>
<div class="jumbotron">
<h1>TITLE</h1>
<p>DESCRIPTION</p>
</div>
<nav>
<ul>
<li><a href="#sejarah">Sejarah</a></li>
<li><a href="#geografis">Geografis</a></li>
<li><a href="#wisata">Wisata</a></li>
</ul>
</nav>
</header>
<main>
<div id="content">
<pre>Hahahaha
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</pre>
</div>
<footer>
<p>FOOTER</p>
</footer>您的元素没有空间变粘，因为它已经在其容器的底部边缘。
相关问题:
Why position:sticky is not working when the element is wrapped inside another one?
Why bottom:0 doesn't work with position:sticky?
1来自 the specification :
The containing block of a static, relative, or sticky box is as defined by its formatting context.
在你的例子中，我们在 block 格式化上下文中，所以
the containing block is formed by the content edge of the nearest block container ancestor box. ref
和
sticky
Identical to relative, except that its offsets are automatically adjusted in reference to the nearest ancestor scroll container’s scrollport (as modified by the inset properties) in whichever axes the inset properties are not both auto, to try to keep the box in view within its containing block as the user scrolls. ref
关于html - 为什么我的粘性导航仅在标题设置为内联时才有效？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/62426596/