js
const navItems = document.querySelectorAll('.navbar__items')
const dropDown = document.querySelectorAll('.dropdown')
dropDown.forEach(element => {
element.addEventListener('click',()=>{
{
navItems.forEach(nav =>{
nav.classList.toggle('drop')
})
}
})
})
HTML
<ul class="navbar">
<li class="nav-menu">
<div class="dropdown">click</div>
<ul class="navbar__items">
<li><a href="#">clicked</a></li>
<li><a href="#">clicked</a></li>
<li><a href="#">clicked</a></li>
</ul>
</li>
<li class="nav-menu">
<div class="dropdown">click</div>
<ul class="navbar__items">
<li><a href="#">clicked</a></li>
<li><a href="#">clicked</a></li>
<li><a href="#">clicked</a></li>
</ul>
</li>
<li class="nav-menu">
<div class="dropdown">click</div>
<ul class="navbar__items">
<li><a href="#">clicked</a></li>
<li><a href="#">clicked</a></li>
<li><a href="#">clicked</a></li>
</ul>
</li>
</ul>
CSS
.navbar{
position: relative;
}
.navbar__items{
position: absolute;
display: none;
}
.drop{
display: block;
}
我有一个导航栏，每个导航栏元素都有下拉元素。我想在单击“下拉”类时显示这些下拉元素。但问题是，当我单击其中之一时，所有下拉菜单都是可见的。如何只显示我点击过的列表？
最佳答案
输入以下代码
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.dropbtn {
background-color: #3498DB;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
.dropbtn:hover, .dropbtn:focus {
background-color: #2980B9;
}
.dropdown {
position: relative;
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f1f1f1;
min-width: 160px;
overflow: auto;
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 a:hover {background-color: #ddd;}
.show {display: block;}
</style>
</head>
<body>
<div class="dropdown">
<button onclick="myFunction()" class="dropbtn">Click</button>
<div id="myDropdown" class="dropdown-content">
<a href="#home">Clicked</a>
<a href="#about">Clicked</a>
<a href="#contact">Clicked</a>
</div>
</div>
<script>
function myFunction() {
document.getElementById("myDropdown").classList.toggle("show");
}
window.onclick = function(event) {
if (!event.target.matches('.dropbtn')) {
var dropdowns = document.getElementsByClassName("dropdown-content");
var i;
for (i = 0; i < dropdowns.length; i++) {
var openDropdown = dropdowns[i];
if (openDropdown.classList.contains('show')) {
openDropdown.classList.remove('show');
}
}
}
}
</script>
</body>
</html>关于javascript - 如何在点击时显示下拉菜单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/68932531/