【发布时间】：2021-03-30 03:20:18
【问题描述】：
我一直在尝试测试在引导程序上创建一个轮播，该轮播在三个图像之间渐变（在本例中为 3 个“大猩猩”jpg）。但是我在学习 HTML 时遇到了困难。
问题 1：尽管类设置为“carousel slide carousel-fade”，但这些图像之间的轮播并未淡出。
问题 2：底部的按钮类正在显示文本 Previous 和 Next 并且正在工作，但是，我需要这些是图标而不是文本。隐藏文本不会显示图标。
我是这一切的初学者，所以我感谢所有的帮助！
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
</head>
<body>
<div id="myCarousel" class="carousel slide carousel-fade" data-bs-ride="carousel">
<div class="carousel-indicators">
<button type="button" data-bs-target="#myCarousel" data-bs-slide-to="0" class="active" aria-current="true"
aria-label="Slide 1"></button>
<button type="button" data-bs-target="#myCarousel" data-bs-slide-to="1" aria-label="Slide 2"></button>
<button type="button" data-bs-target="#myCarousel" data-bs-slide-to="2" aria-label="Slide 3"></button>
</div>
<div class="carousel-inner">
<div class="carousel-item active" data-bs-interval="3000">
<img src="http://placehold.jp/150x150.png" class="d-block w-100" alt="...">
<div class="carousel-caption d-none d-md-block">
<h5>First slide label</h5>
<p>Some representative placeholder content for the first slide.</p>
</div>
</div>
<div class="carousel-item" data-bs-interval="3000">
<img src="http://placehold.jp/50x50.png" class="d-block w-100" alt="...">
<div class="carousel-caption d-none d-md-block">
<h5>Second slide label</h5>
<p>Some representative placeholder content for the second slide.</p>
</div>
</div>
<div class="carousel-item" data-bs-interval="3000">
<img src="http://placehold.jp/100x100.png" class="d-block w-100" alt="...">
<div class="carousel-caption d-none d-md-block">
<h5>Third slide label</h5>
<p>Some representative placeholder content for the third slide.</p>
</div>
</div>
</div>
<button class="carousel-control-prev" type="button" data-bs-target="#myCarousel" data-bs-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</button>
<button class="carousel-control-next" type="button" data-bs-target="#myCarousel" data-bs-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</button>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js"
integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf" crossorigin="anonymous"></script>
</body>
</html>【问题讨论】：
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Bootstrap 4 需要 jquery。因此，您需要将 jquery 添加到您的站点。
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>