Html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>下拉菜单</title>
<link href="../css/20240409.css" rel="stylesheet">
</head>
<body>
<div class="box">
<div class="dropdown">Button
<span class="left-icon"></span>
<span class="right-icon"></span>
<div class="items">
<a href="#" style="--i:1;"><span></span>Vue</a>
<a href="#" style="--i:2;"><span></span>React</a>
<a href="#" style="--i:3;"><span></span>JQuery</a>
</div>
</div>
</div>
<script>
const dropdown = document.querySelector('.dropdown');
dropdown.addEventListener('click', function(){
this.classList.toggle('active');
})
</script>
</body>
</html>Css:
@import url(https://fonts.googleapis.com/css?family=Poppins:200,300,400,500,600,700,800,900&display=swap);
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Poppins', sans-serif;
}
body{
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background: #ebf1db;
}
.box{
position: relative;
width: 250px;
height: 250px;
}
.dropdown{
position: relative;
width: 100%;
height: 60px;
background: #004197;
color: #fff;
font-size: 22px;
display: flex;
justify-content: center;
align-items: center;
border-radius: 5px;
cursor: pointer;
box-shadow: 0 5px 10px rgba(0, 0, 0, .2);
}
.dropdown .left-icon ,
.dropdown .right-icon{
position: relative;
top : 2px;
display: inline-block;
width: 15px;
height: 5px;
background: #fff;
border-radius: 40px;
transition: .5s;
}
.dropdown .left-icon{
left: 7px;
transform: rotate(45deg);
}
.dropdown.active .left-icon{
transform: rotate(135deg);
}
.dropdown .right-icon{
transform: rotate(-45deg);
}
.dropdown.active .right-icon{
transform: rotate(-135deg);
}
.dropdown .items{
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 160px;
margin-top: 63px;
overflow: hidden;
visibility: hidden;
transition: .5s;
}
.dropdown.active .items{
visibility: visible;
}
.dropdown .items a{
position: relative;
left: 100%;
display: flex;
font-size: 20px;
background: #fff;
color: #004197;
text-decoration: none;
border-radius: 5px;
padding: 10px 15px;
margin-top: 2.5px;
z-index: 1;
overflow: hidden;
transition: .5s;
transition-delay: calc(60ms * var(--i));
}
.dropdown.active .items a{
left: 0;
}
.dropdown .items a:hover{
color: #fff;
}
.dropdown .items a span{
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: #007fe0;
z-index: -1;
border-radius: inherit;
transform: rotate(160deg);
transform-origin: right;
transition: .5s;
}
.dropdown .items a:hover span{
transform: rotate(0deg);
}效果图：