想问一下如何更改Jumbotron的不透明度并使其全宽而不影响字体和按钮的不透明度吗?
.jumbotron-special{
text-align: center;
background-attachment: scroll;
background-image: image-url('header-bg.jpg');
background-position: center center;
background-repeat: none;
-webkit-background-size: cover;
-moz-background-size: cover;
background-size: cover;
-o-background-size: cover;
// how to only make background-image-opacity: 0.3;
}
最佳答案
您可以在另一个元素中添加背景,并仅降低该元素的不透明度:
.jumbotron-special {
position: relative;
}
.jumbotron-special:after {
content : "";
display: block;
position: absolute;
top: 0;
left: 0;
background-image: url('header-bg.jpg');
width: 100%;
height: 100%;
opacity : 0.3;
z-index: -1;
}