如何解决引导程序4的轮播无法实施
我已经使用Bootstrap 4编写了以下有关轮播的代码。我已经附加了代码。但是，即使有控件，我也无法将其他幻灯片带入图片。我想知道代码有什么问题。
carousel.js
<html>
<head>
<title> Carousel</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/javascript.util/0.12.12/javascript.util.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<title>Carousel</title>
<style>
</style>
</head>
<body>
<div class="container">
<h2>Carousel Example</h2>
<div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
<!-- Wrapper for slides -->
<div class="carousel-inner">
<div class="carousel-item active">
<img class="d-block w-100" src="Desert.jpg" alt="Desert" style="width:100%;">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="Hydrangeas.jpg" alt="Hydrangeas" style="width:100%;">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="Jellyfish.jpg" alt="Jellyfish" style="width:100%;">
</div>
</div>
<!-- Left and right controls -->
<a class="carousel-control-prev" href="#carouselExampleControls" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">PrevIoUs</span>
</a>
<a class="carousel-control-next" href="#carouselExampleControls" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</div>
</body>
</html>
解决方法
您没有添加Bootstrap JavaScript plugins，因此轮播的滑动行为代码不可用。您必须至少将以下<script>添加到<head>：
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js" integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV" crossorigin="anonymous"></script>
您的工作示例：
<html>
<head>
<title> Carousel</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/javascript.util/0.12.12/javascript.util.min.js"></script>
<!-- Bootstrap CSS and JS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js" integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV" crossorigin="anonymous"></script>
</head>
<body>
<div class="container">
<h2>Carousel Example</h2>
<div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
<!-- wrapper for slides -->
<div class="carousel-inner">
<div class="carousel-item active">
<img class="d-block w-100" src="https://placehold.it/100x101" alt="Desert" style="width:100%;">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="https://placehold.it/100x102" alt="Hydrangeas" style="width:100%;">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="https://placehold.it/100x103" alt="Jellyfish" style="width:100%;">
</div>
</div>
<!-- left and right controls -->
<a class="carousel-control-prev" href="#carouselExampleControls" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carouselExampleControls" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</div>
</body>
</html>
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