为什么我在 Bootstrap 中的轮播指示器不起作用？

Question

我的轮播的指示器没有显示在屏幕上。 我遵循了多个教程，他们使用<ol>标签制作轮播指示器，但是当我编写类似的代码时，它不会运行或显示轮播指示器。

 .carousel-item { height: 32rem; background: #777; } h2 { font-size: 300%; color: rgb(252, 255, 222); font-weight: 600; } p { font-size: 150%; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; font-weight: 500; }.btn { background-color: rgba(214, 32, 87, 0.685); } a { font-size: 150%; } #items a:hover { background-color: rgba(148, 8, 50, 0.685); }

 <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x" crossorigin="anonymous"> <script src="js/bootstrap.js"></script> <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> <div id="my_carousel" class="carousel slider" data-ride="carousel" data-interval="1000"> <ol class="carousel-indicators"> <li data-target="#my_carousel" data-slide-to="0" class="active"></li> <li data-target="#my_carousel" data-slide-to="1"></li> <li data-target="#my_carousel" data-slide-to="2"></li> <li data-target="#my_carousel" data-slide-to="3"></li> <li data-target="#my_carousel" data-slide-to="4"></li> <li data-target="#my_carousel" data-slide-to="5"></li> <li data-target="#my_carousel" data-slide-to="6"></li> </ol> <div id="items" class="carousel-inner"> <div class="carousel-item active"> <img src="images/pizza.PNG" alt="Image Not Available" class="d-block w-100"> <div class="carousel-caption d-none d-md-block"> <h2>Delicious Pizza</h2> <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit.</p> <a href="#" class="btn btn-lg text-center text-light">Order Now</a> </div> </div> <div class="carousel-item"> <img src="images/chickenplatter.jpg" alt="Image Not Available" class="d-block w-100"> <div class="carousel-caption d-none d-md-block"> <h2>Delicious Platter</h2> <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit.</p> <a href="#" class="btn btn-lg text-center text-light">Order Now</a> </div> </div> <div class="carousel-item"> <img src="images/ssoupp.PNG" alt="Image Not Available" class="d-block w-100"> <div class="carousel-caption d-none d-md-block"> <h2>Special Lamb Soup</h2> <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit.</p> <a href="#" class="btn btn-lg text-center text-light">Order Now</a> </div> </div> <div class="carousel-item"> <img src="images/biryani.jpg" alt="Image Not Available" class="d-block w-100"> <div class="carousel-caption d-none d-md-block"> <h2>Bombay Biryani</h2> <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit.</p> <a href="#" class="btn btn-lg text-center text-light">Order Now</a> </div> </div> <div class="carousel-item"> <img src="images/chicken karahi.PNG" alt="Image Not Available" class="d-block w-100"> <div class="carousel-caption d-none d-md-block"> <h2>Mutton & Chicken Karahi</h2> <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit.</p> <a href="#" class="btn btn-lg text-center text-light">Order Now</a> </div> </div> <div class="carousel-item"> <img src="images/rice.PNG" alt="Image Not Available" class="d-block w-100"> <div class="carousel-caption d-none d-md-block"> <h2>Dumpukht Pulao</h2> <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit.</p> <a href="#" class="btn btn-lg text-center text-light">Order Now</a> </div> </div> <div class="carousel-item"> <img src="images/chinesesoup.PNG" alt="Image Not Available" class="d-block w-100"> <div class="carousel-caption d-none d-md-block"> <h2>Chinese Seafood Soup</h2> <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit.</p> <a href="#" class="btn btn-lg text-center text-light">Order Now</a> </div> </div> </div> <div> <a href="#my_carousel" class="carousel-control-prev " role="button" data-slide="prev"> <span class="carousel-control-prev-icon" style="width: 36%; height: 4rem; margin-right: 5rem;"></span> </a> <a href="#my_carousel" class="carousel-control-next" data-slide="next"> <span class="carousel-control-next-icon" style="width: 36%; height: 4rem; margin-left: 5rem;"></span> </a> </div> </div>

任何帮助将不胜感激。 提前致谢。

如果有人能指导我如何通过 CDN 路径和下载上述文件来包含 javascript popperly 和 jQuery 文件，那也将非常好。

太感谢了。

Answer 1

 <head> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous"> <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> </head>

删除脚本和链接标签并粘贴此代码。 它就像一个魅力。 我们在 head 部分包含任何 cdn 链接或脚本标记，并且您尚未在文件中添加任何 head 标记。 这就是为什么它不起作用。 否则你的代码是最新的。