我修改了example from W3 schools稍微包含一个嵌套的下拉菜单。我不知道如何编辑 css，以便下拉菜单始终出现在悬停按钮的右侧。
理想情况下，当鼠标悬停在“主”按钮上，然后悬停在“子”按钮2上时，我希望下拉看起来像这样
[Main button] - [Sub button1]
[Sub button2] - [Sub button2 item1]
[Sub button3] - [Sub button2 item2]
- [Sub button2 item3]
.dropbtn {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
.dropdown {
position: relative;
display: inline-block;
}
.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;
padding: 12px 16px;
text-decoration: none;
display: block;
}
.dropdown-content a:hover {background-color: #f1f1f1}
.dropdown:hover > .dropdown-content {
display: block;
}
.dropdown:hover .dropbtn {
background-color: #3e8e41;
}<!DOCTYPE html>
<html>
<head>
</head>
<body>
<h2>Dropdown Menu</h2>
<p>Move the mouse over the button to open the dropdown menu.</p>
<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
</div>
</div>
<p><strong>Note:</strong> We use href="#" for test links. In a real web site this would be URLs.</p>
</body>
</html>最佳答案
只需添加 left: 100%; top: 0; 到您的 .dropdown-content。这将设置为绝对元素的定义位置。
.dropbtn {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
.dropdown {
position: relative;
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
left: 100%;
top: 0;
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;
padding: 12px 16px;
text-decoration: none;
display: block;
}
.dropdown-content a:hover {
background-color: #f1f1f1
}
.dropdown:hover>.dropdown-content {
display: block;
}
.dropdown:hover .dropbtn {
background-color: #3e8e41;
}<h2>Dropdown Menu</h2>
<p>Move the mouse over the button to open the dropdown menu.</p>
<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
</div>
</div>
<p><strong>Note:</strong> We use href="#" for test links. In a real web site this would be URLs.</p>关于html - CSS 嵌套下拉菜单向右打开，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58021549/