就是当鼠标指向图片的时候,图片会蒙上一层半透明的黑色遮罩,遮罩上有文字,不用伪类也可以,在html中加个div什么的样式和:after一样就行了,代码如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.imgbox{
width:200px;
height: 140px;
position:relative;
overflow: hidden;
}
img{
width:100%;
}
.imgbox:after{
position:absolute;
left: 0;
top:0;
display: block;
width:100%;
height: 100%;
background-color: rgba(0, 0, 0, 0.5);
content: attr(data-text);
transition:all 1s ease;
transform: translateY(-100%);
color: #FFF;
}
.imgbox:hover:after{
transform: translateY(0);
}
</style>
</head>
<body>
<div data-text="我是文字">
<img src="./2.jpg" alt="">
</div>
</body>
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