在HTML的：hover上的图像上显示或
为了在鼠标悬停在图像上时允许div或span元素出现在图像上，可以使用.image：hoveroverlay，
为了绝对地相对于父元素定位.overlay元素，我们将所有图像尺寸的高度和宽度设置为100％，从而使父元素内联块
的HTML
<div class="image">
<img src="..." />
<div class="overlay">Content to be displayed on hover</div>
</div>
的CSS
By hiding the .overlay element by default, we use the selector .image:hover .overlay to change the styling on hover. Due to the HTML structure, this works well because .overlay is a descendant element.
.image {
position:relative;
display:inline-block;
}
.overlay {
display:none;
}
.image:hover .overlay {
width:100%;
height:100%;
background:rgba(0,0,0,.5);
position:absolute;
top:0;
left:0;
display:inline-block;
-webkit-box-sizing:border-box;
-moz-box-sizing:border-box;
box-sizing:border-box;
/* All other styling - see example */
img {
vertical-align:top;
}
}热门推荐
为了在鼠标悬停在图像上时允许div或span元素出现在图像上，可以使用.image：hoveroverlay，
为了绝对地相对于父元素定位.overlay元素，我们将所有图像尺寸的高度和宽度设置为100％，从而使父元素内联块
的HTML
<div class="image"> <img src="..." /> <div class="overlay">Content to be displayed on hover</div> </div>
的CSS
By hiding the .overlay element by default, we use the selector .image:hover .overlay to change the styling on hover. Due to the HTML structure, this works well because .overlay is a descendant element.
.image {
position:relative;
display:inline-block;
}
.overlay {
display:none;
}
.image:hover .overlay {
width:100%;
height:100%;
background:rgba(0,0,0,.5);
position:absolute;
top:0;
left:0;
display:inline-block;
-webkit-box-sizing:border-box;
-moz-box-sizing:border-box;
box-sizing:border-box;
/* All other styling - see example */
img {
vertical-align:top;
}
}