如何解决margin-bottom无法正常工作并显示间隙html和css
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width,initial-scale=1">
<style>
body {
margin: 0;
}
.navbar {
overflow: hidden;
background-color: #333;
position: fixed;
top: 0;
width: 100%;
margin-bottom: 200px;
}
.navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background: #ddd;
color: black;
}
.main {
padding: 16px;
margin-top: 30px;
height: 1500px;
/* Used in this example to enable scrolling */
}
</style>
</head>
<body>
<div class="navbar">
<a href="#home">Home</a>
<a href="#news">News</a>
<a href="#contact">Contact</a>
</div>
<div class="main">
<h1>Fixed Top Menu</h1>
<h2>Scroll this page to see the effect</h2>
<h2>The navigation bar will stay at the top of the page while scrolling</h2>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
</div>
</body>
</html>
在 .navbar 选择器中,我添加了margin-bottom:200px;为什么它没有显示任何效果。为什么不在导航栏和其下方的内容之间放置200px的间距。 我试图显示它们之间的差距,并尝试从下至上。只想知道为什么它不起作用。 我提供了以下代码。
解决方法
因为您指定了position: fixed
规则。我用position: sticky
规则代替了您。您的margin-bottom
现在可以正常工作。
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width,initial-scale=1">
<style>
body {
margin: 0;
}
.navbar {
overflow: hidden;
background-color: #333;
/*position: fixed;*/
position: sticky;
top: 0;
width: 100%;
margin-bottom: 200px;
}
.navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background: #ddd;
color: black;
}
.main {
padding: 16px;
margin-top: 30px;
height: 1500px;
/* Used in this example to enable scrolling */
}
</style>
</head>
<body>
<div class="navbar">
<a href="#home">Home</a>
<a href="#news">News</a>
<a href="#contact">Contact</a>
</div>
<div class="main">
<h1>Fixed Top Menu</h1>
<h2>Scroll this page to see the effect</h2>
<h2>The navigation bar will stay at the top of the page while scrolling</h2>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
<p>Some text some text some text some text..</p>
</div>
</body>
</html>
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