[英]Why does my navigation bar dropdown not work?
所以我目前正在 W3Schools 上學習 CSS,我正在嘗試創建一個包含下拉菜單的導航欄。 我正在嘗試重新創建這個(順便說一句,它工作得很好) :
<!DOCTYPE html>
<html>
<head>
<style>
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #333;
}
li {
float: left;
}
li a {
display: inline-block;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover, .dropdown:hover {
background-color: red;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}
.dropdown-content a {
color: black;
text-decoration: none;
display: block;
text-align: left;
}
.dropdown-content a:hover {background-color: #f1f1f1;}
.dropdown:hover .dropdown-content {
display: block;
}
</style>
</head>
<body>
<ul>
<li><a href="#home">Home</a></li>
<li><a href="#news">News</a></li>
<li class="dropdown">
<a href="#">Dropdown</a>
<div class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</li>
</ul>
<h3>Dropdown Menu inside a Navigation Bar</h3>
<p>Hover over the "Dropdown" link to see the dropdown menu.</p>
</body>
</html>
這是我的代碼:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Dropdown Navigation Bar</title>
<style>
div.nrm {
position: fixed;
top: 0;
left: 0;
}
body {
background-color: #BCBF69;
font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
color: white;
}
ul {
list-style-type: none;
padding: 0;
margin: 0;
overflow: hidden;
background-color: #212226;
width: 100%;
}
li {
float: left;
}
li a {
display: inline-block;
color: white;
text-align: center;
padding: 14px 15px;
text-decoration: none;
}
.home {
background-color: #D9A76A;
}
.home:hover {
background-color: rgb(104, 94, 81);
}
li a:hover, .dropdown:hover {
background-color: #494b50;
}
.dd-content {
display: none;
position: absolute;
background-color: #D9A76A;
min-width: 120px;
z-index: 1;
}
.dd-content a {
text-decoration: none;
text-align: left;
display: block;
}
.dd-content a:hover {
background-color: rgb(230, 204, 172);
}
.dropdown:hover .dd-content {
display: block;
}
</style>
</head>
<body>
<div class="nrm">
<ul>
<li><a href="#home" class="home">Home</a></li>
<li><a href="#explore">Explore</a></li>
<li class="dropdown">
<a href="#">Create</a></li>
<div class="dd-content">
<a href="#">Media</a>
<a href="#">Games</a>
<a href="#">Other</a>
</div>
</ul>
</div>
</body>
</html>
出於某種原因,當我將鼠標懸停在下拉菜單上時,它似乎什么也沒做。 我真的可以使用一些幫助。
dd-content 必須在<li>
標簽內,這就是為什么不起作用。
<div class="nrm">
<ul>
<li><a href="#home" class="home">Home</a></li>
<li><a href="#explore">Explore</a></li>
<li class="dropdown">
<a href="#">Create</a>
<div class="dd-content">
<a href="#">Media</a>
<a href="#">Games</a>
<a href="#">Other</a>
</div>
</li>
</ul>
</div>
首先是去除overflow: hidden; 從 ul 統治。 您還需要將下拉列表包含在 li 中。 將父 li 設置為 position:relative;
div.nrm { position: fixed; top: 0; left: 0; } body { background-color: #BCBF69; font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif; color: white; } ul { list-style-type: none; padding: 0; margin: 0; background-color: teal; width: 100%; display: flex; } li a { display: inline-block; color: white; text-align: center; padding: 14px 15px; text-decoration: none; } .home { background-color: #D9A76A; } .home:hover { background-color: rgb(104, 94, 81); } li a:hover, .dropdown:hover { background-color: tomato; } .dropdown { position: relative; } .dd-content { display: none; position: absolute; right: 0; top: 100%; background-color: DarkOrchid; width: 100%; z-index: 1; } .dd-content a { text-decoration: none; text-align: left; display: block; } .dd-content a:hover { background-color: rgb(230, 204, 172); } .dropdown:hover .dd-content { display: block; }
<body> <div class="nrm"> <ul> <li><a href="#home" class="home">Home</a></li> <li><a href="#explore">Explore</a></li> <li class="dropdown"> <a href="#">Create</a> <div class="dd-content"> <a href="#">Media</a> <a href="#">Games</a> <a href="#">Other</a> </div> </li> </ul> </div> </body>
CSS 讀取您的樣式: .dropdown:hover .dd-content
嘿,當我將鼠標懸停在.dropdown:hover
查看我身邊的一個名為.dd-content
的目標時
這是不存在的,因為您的目標是根據上述結構的兄弟姐妹
所以在這種情況下,你必須說點別的:
.dropdown:hover + .dd-content
現在,當我將鼠標懸停在.dropdown:hover
查看下一個名為.dd-content
兄弟時,css 會讀取它
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.