css - slider 内的图像封面

Question

我有以下 Bootstrap slider

<div id="demo" class="carousel slide" data-ride="carousel">

  <!-- Indicators -->
  <ul class="carousel-indicators">
    <li data-target="#demo" data-slide-to="0" class="active"></li>
    <li data-target="#demo" data-slide-to="1"></li>
    <li data-target="#demo" data-slide-to="2"></li>
  </ul>

  <!-- The slideshow -->
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="la.jpg" alt="Los Angeles" width="100%" height="100%">
    </div>
    <div class="carousel-item">
      <img src="chicago.jpg" alt="Chicago" width="100%" height="100%">
    </div>
    <div class="carousel-item">
      <img src="ny.jpg" alt="New York" width="100%" height="100%">
    </div>
  </div>

  <!-- Left and right controls -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
    <span class="carousel-control-next-icon"></span>
  </a>
</div>

我有不同高度的图片，如何使用封面功能让所有图片的高度和宽度都相同以适合边框并具有封面中心效果？

https://www.w3schools.com/cssref/playit.asp?filename=playcss_background-size&preval=cover

Answer 1

答案在这里

<div id="demo" class="carousel slide" data-ride="carousel">

  <!-- Indicators -->
  <ul class="carousel-indicators">
    <li data-target="#demo" data-slide-to="0" class="active"></li>
    <li data-target="#demo" data-slide-to="1"></li>
    <li data-target="#demo" data-slide-to="2"></li>
  </ul>

  <!-- The slideshow -->
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="la.jpg" alt="Los Angeles" width="100%" style="object-fit: cover; object-position: 50% 50%; height: 60vh">
    </div>
    <div class="carousel-item">
      <img src="chicago.jpg" alt="Chicago" width="100%" style="object-fit: cover; object-position: 50% 50%; height: 60vh">
    </div>
    <div class="carousel-item">
      <img src="ny.jpg" alt="New York" width="100%" style="object-fit: cover; object-position: 50% 50%; height: 60vh">
    </div>
   </div>

  <!-- Left and right controls -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
     <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
     <span class="carousel-control-next-icon"></span>
  </a>
 </div>

注意:object-git 不适用于 IE，object-position center center 不适用于所有浏览器