边框图像与不透明度

Question

我有这个:

.striped-border {
    border: 8px solid transparent;
    border-image: url(../img/stripes.png) 9 round;
}

我想要的是:

是否可以仅对边框图像应用不透明度而不是内容？

Answer 1

您可以使用pseudo-element创建边框border-image然后设置opacity.

div {
  position: relative;
  margin: 50px;
  font-size: 25px;
  padding: 10px 25px;
  display: inline-block;
}
div:after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  border: 5px solid transparent;
  border-image: url('http://www.circlek.org/Libraries/2013_branding_design_elements/graphic_CKI_horizontal_stripesblue_RGB.sflb.ashx') 22 22 repeat;
  transform: translate(-5px, -5px);
  opacity: 0.4;
}

<div>Element</div>
<div>Element <br> lorem</div>