Bootstrap v4.0.3 Alpha 轮播阴影

Question

阿罗哈，

我正在（仍然）在引导程序网站上工作，并希望将（插图！）阴影应用于轮播。HTML 看起来像这样：

    <div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
  <ol class="carousel-indicators">
    <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
    <li data-target="#carousel-example-generic" data-slide-to="1"></li>
    <li data-target="#carousel-example-generic" data-slide-to="2"></li>
  </ol>
  <div class="carousel-inner" role="listbox">
    <div class="carousel-item active">
      <img src="..." alt="First slide">
    </div>
    <div class="carousel-item">
      <img src="..." alt="Second slide">
    </div>
    <div class="carousel-item">
      <img src="..." alt="Third slide">
    </div>
  </div>
  <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
    <span class="icon-prev" aria-hidden="true"></span>
    <span class="sr-only">Previous</span>
  </a>
  <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
    <span class="icon-next" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
  </a>
</div>

试图通过申请

.carousel-item {
    box-shadow: inset 0 0 20rem rgba(0,0,0,1);

}
.carousel-item img {
    z-index: -1;
}

（以及其他一些不起作用）。

有人知道如何解决这个问题吗？

Answer 1

图像隐藏了阴影。使用带有 box-shadow 的伪元素代替..

.carousel-item:before {
    -webkit-box-shadow: inset 0 0 20rem rgba(0, 0, 0, 1);
    box-shadow: inset 0 0 20rem rgba(0, 0, 0, 1);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    content: "";
}

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