stacking context
,将
.shadow
元素在它的同级之上。为了防止这种情况,您可以使用转换以外的其他属性(
top: -3px
例如):
.container {
margin: 30px;
padding: 10px;
}
.shadow {
position: relative;
height: 100px;
width: 100px;
background-color: #ff0;
float: left;
margin: 4px;
}
.shadow::after {
content: "";
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
z-index: -1;
box-shadow: 0px 10px 1000px #000;
}
.shadow:hover {
top: -3px;
}
.shadow:hover::after {
box-shadow: 0px 20px 1500px #000;
}
<div class="container">
<div class="shadow"></div>
<div class="shadow"></div>
<div class="shadow"></div>
<div class="shadow"></div>
</div>