我想向当前的导航栏添加下拉菜单。我尝试了这段代码，但下拉内容消失了，现在我没有任何想法来编辑代码以使其正常工作。我尝试了一些编辑，但与下拉列表无关。 Dropdown、dropbtn 已添加到之前的代码中。你能帮我解决这个问题吗？非常感谢!
这里是代码:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<link rel="shortcut icon" type="image/x-icon" href="menu.png" />
<title>MENU | Úvodné menu</title>
<meta charset=utf-8>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<style>
body {
height: 100%;
background-image: linear-gradient(orange, red);
}
</style>
<style>
body,h1 {font-family: "Raleway", sans-serif}
body, html {height: 100%}
.bgimg {
background-image: linear-gradient(orange, red);
min-height: 100%;
background-position: full;
background-size: ;
}
</style>
<style>
* {box-sizing: border-box;}
body {
margin: 0;
font-family: Arial, Helvetica, sans-serif;
}
.dropdown .dropbtn {
font-size: 16px;
border: none;
outline: none;
color: white;
padding: 14px 16px;
background-color: inherit;
font-family: inherit;
margin: 0;
}
.header {
overflow: hidden;
background-color: orange;
padding: 20px 10px;
}
.header a {
float: left;
color: white;
text-align: center;
padding: 12px;
text-decoration: none;
font-size: 18px;
line-height: 25px;
border-radius: 4px;
}
.header a.logo {
font-size: 25px;
font-weight: bold;
}
.header a:hover {
background-color: #ddd;
color: black;
}
.header a.active {
background-color: red;
color: white;
}
.header-right {
float: right;
}
@media screen and (max-width: 500px) {
.header a {
float: none;
display: block;
text-align: left;
}
.header-right {
float: none;
}
}
.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 {
float: none;
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
text-align: left;
}
.dropdown-content a:hover {
background-color: #ddd;
}
.dropdown {
float: left;
overflow: hidden;
}
.dropdown:hover .dropdown-content {
display: block;
}
tyle>
</head>
<body onload="startTime()">
<div class="header">
<a id="txt" hidden></a>
<img src="https://i.ibb.co/6Nkbdb3/dlhemenu-1-1-1.png" class="logo" title="Odhlásiť sa" alt="MENU logo" width="150" height="50" onclick="window.location='/logout.php'">
 
<a class="dropbtn"><i class="fa fa-user"> </i>Dropdown
<i class="fa fa-caret-down"></i>
</a>
<div class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
<div class="header-right">
<a class="active" href="/welcome.php">Úvodné menu</a>
<a href="/online.html">Online hodiny</a>
<a href="/vyplnit.html">Testy na vyplnenie</a>
<a href="/znamky3.html">Známky</a>
<a href="/rozvrh.html">Rozvrh hodín</a>
<a href="/dochadzka.html">Dochádzka</a>
<a href="/ucenie.html">Učebný materiál</a>
<a href="/hry.html">Hry</a>
<a href="/omne.php">O mne</a>
</div>
</div>
最佳答案
添加hover css以显示下拉内容
.dropbtn:hover ~ .dropdown-content {display: block;}
关于javascript - 另一个栏上的下拉导航，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/70413805/