引导程序转盘控件没有响应

这是一个非常常见的问题，我将在下面发布其他答案的链接。

最小样本：https://jsfiddle.net/aq9Laaew/284188

html:

<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>
<body>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script src="main.js"></script>
<div class="carousel slide" data-ride="carousel">
<div class="carousel-inner">
<div class="carousel-item active">
<center><p> First slide</p></center>
</div>
<div class="carousel-item">
<center><p> Second slide</p></center>
</div>
</div>
<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>
</body>
</html>

js:

$(function(){
$('.carousel').carousel()
})

这创建了一个引导程序转盘，动画工作，转盘自动在第一张和第二张幻灯片之间切换。但是控制装置什么都不做。

以下是类似的SO帖子：

引导旋转木马没有响应问题是到jquery的链接断开
Bootstrap Carousel控件无法正常工作，无法正确调用Carousel((
Bootstrap 4旋转木马控件不工作popper.js未正确包含
引导程序转盘控件不工作jquery不包括在内

我认为我的设置是正确的，我基本上只是将carousel示例代码粘贴到引导程序启动模板中。

似乎工作正常。

<!doctype html>
<html lang="en">
<head>
<title>Title</title>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
</head>
<body>
<div id="carouselId" class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#carouselId" data-slide-to="0" class="active"></li>
<li data-target="#carouselId" data-slide-to="1"></li>
<li data-target="#carouselId" data-slide-to="2"></li>
</ol>
<div class="carousel-inner" role="listbox">
<div class="carousel-item active">
<img data-src="holder.js/900x500/auto/#777:#555/text:First slide" alt="First slide">
</div>
<div class="carousel-item">
<img data-src="holder.js/900x500/auto/#666:#444/text:Second slide" alt="Second slide">
</div>
<div class="carousel-item">
<img data-src="holder.js/900x500/auto/#666:#444/text:Third slide" alt="Third slide">
</div>
</div>
<a class="carousel-control-prev" href="#carouselId" 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="#carouselId" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
</body>
</html>

如果您访问fiddle，您会注意到代码现在可以工作了。原因是转盘需要id="carouselExampleControls"。

有了这个id，一切都很好。如果您删除它，它将不再有响应。

id是必要的，因为控制项引用它：

<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>

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