为什么我的 Bootstrap 轮播只移动一次？

Question

我正在尝试在我的网站中实现 Bootstrap Carousel，但是我遇到了一个问题，它只会移动一次并且会变得无响应。我检查了文件的顺序，这似乎不是问题。所以这让我很难理解是什么导致了我的问题。

HTML：

<div class="container bg-secondary" id="projectContainer">       
        <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
            <ol class="carousel-indicators">
              <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
              <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
              <li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
            </ol>
            <div class="carousel-inner">
              <div class="carousel-item active">
                <img class="d-block w-100" src="styles\media\gazeteerScreenShot.png" alt="First slide">
              </div>
              <div class="carousel-item">
                <img class="d-block w-100" src="styles\media\gazeteerInfoScreenShot.png" alt="Second slide">
              </div>
              <div class="carousel-item">
                <img class="d-block w-100" src="styles\media\gazeteerMarkerScreenShot.png" alt="Third slide">
              </div>
              <div class="carousel-item">
                <img class="d-block w-100" src="styles\media\gazeteerWebcamScreenShot.png" alt="Fourth slide">
              </div>
            </div>
            <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev" onclick="$('.carousel').carousel('prev')">
              <span class="carousel-control-prev-icon" aria-hidden="true"></span>
              <span class="sr-only">Previous</span>
            </a>
            <a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next" onclick="$('.carousel').carousel('next')">
              <span class="carousel-control-next-icon" aria-hidden="true"></span>
              <span class="sr-only">Next</span>
            </a>
          </div>
    </div>

我的 JS 文件是如何排序的：

<!-- jQuery Required File -->
<script type="text/javascript" src="libs\jQuery\jquery-3.6.0.min.js"></script>
<!-- The Main Javascript file, this contains all our jQuery and PHP -->
<script type="text/javascript" src="libs/js/script.js"></script>  
<!-- Bootstrap JS -->
<script  type="text/javascript" src="bootstrap-5.1.3-dist\js\bootstrap.bundle.min.js"></script>

Javascript/jQuery：

$(document).ready(function() {
    $('.carousel').carousel({
        ride: "true",
        interval: 1000
    });  
});

$(document).ready(function() {
  $('.carousel').carousel({
    ride: "true",
    interval: 1000
  });
});

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">

<div class="container bg-secondary" id="projectContainer">
  <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
    <ol class="carousel-indicators">
      <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
      <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
      <li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
    </ol>
    <div class="carousel-inner">
      <div class="carousel-item active">
        <img class="d-block w-100" src="styles\media\gazeteerScreenShot.png" alt="First slide">
      </div>
      <div class="carousel-item">
        <img class="d-block w-100" src="styles\media\gazeteerInfoScreenShot.png" alt="Second slide">
      </div>
      <div class="carousel-item">
        <img class="d-block w-100" src="styles\media\gazeteerMarkerScreenShot.png" alt="Third slide">
      </div>
      <div class="carousel-item">
        <img class="d-block w-100" src="styles\media\gazeteerWebcamScreenShot.png" alt="Fourth slide">
      </div>
    </div>
    <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev" onclick="$('.carousel').carousel('prev')">
      <span class="carousel-control-prev-icon" aria-hidden="true"></span>
      <span class="sr-only">Previous</span>
    </a>
    <a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next" onclick="$('.carousel').carousel('next')">
      <span class="carousel-control-next-icon" aria-hidden="true"></span>
      <span class="sr-only">Next</span>
    </a>
  </div>
</div>
How my JS files are ordered:

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>

Answer 1

主要的问题是你少了一个指标。脚本在尝试查找最后一个时出错。

Uncaught TypeError: Cannot read properties of null (reading 'classList')
    at st._setActiveIndicatorElement (carousel.js:364)
    at st._slide (carousel.js:435)
    at st.next (carousel.js:142)
    at Function.carouselInterface (carousel.js:526)
    at HTMLDivElement.<anonymous> (carousel.js:535)
    at Function.each (jquery.min.js:2)
    at S.fn.init.each (jquery.min.js:2)
    at S.fn.init.jQueryInterface [as carousel] (carousel.js:534)
    at HTMLAnchorElement.onclick (js:37)

您的数据属性中似乎缺少-bs。见the docs。

此外，没有 Bootstrap 库会在标记中调用 onclick 属性。这就是数据属性的作用。

$(document).ready(function() {
  $('.carousel').carousel({
    ride: "true",
    interval: 1000
  });
});

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">

<div class="container bg-secondary" id="projectContainer">
  <div id="carouselExampleIndicators" class="carousel slide" data-bs-ride="carousel">
    <ol class="carousel-indicators">
      <li data-bs-target="#carouselExampleIndicators" data-bs-slide-to="0" class="active"></li>
      <li data-bs-target="#carouselExampleIndicators" data-bs-slide-to="1"></li>
      <li data-bs-target="#carouselExampleIndicators" data-bs-slide-to="2"></li>
      <li data-bs-target="#carouselExampleIndicators" data-bs-slide-to="3"></li>
    </ol>

    <div class="carousel-inner">
      <div class="carousel-item active">
        <img class="d-block w-100" src="https://via.placeholder.com/1200x300" alt="First slide">
      </div>
      <div class="carousel-item">
        <img class="d-block w-100" src="https://via.placeholder.com/1200x300" alt="Second slide">
      </div>
      <div class="carousel-item">
        <img class="d-block w-100" src="https://via.placeholder.com/1200x300" alt="Third slide">
      </div>
      <div class="carousel-item">
        <img class="d-block w-100" src="https://via.placeholder.com/1200x300" alt="Fourth slide">
      </div>
    </div>
    
    <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-bs-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="#carouselExampleIndicators" role="button" data-bs-slide="next">
      <span class="carousel-control-next-icon" aria-hidden="true"></span>
      <span class="sr-only">Next</span>
    </a>
  </div>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>