为什么轮播滑块不会加载 jpeg 图像？答案

【问题标题】：why does the carousel slider wont load jpeg images?为什么轮播滑块不会加载 jpeg 图像？
【发布时间】：2023-03-17 18:15:01
【问题描述】：

    <ul class="carousel-indicators">
        <li data-target="#slides" data-slide-to="0" class="active"></li>
        <li data-target="#slides" data-slide-to="1"></li>
        <li data-target="#slides" data-slide-to="2"></li>   

    </ul>
    <div class="carousel-inner">
        <div class="carousel-item active">
            <img class="d-block w-100" src="img/kcochi.png" alt="First slide">
            <div class="carousel-caption">
                <h1 class="display-2">CargoTrack</h1>
                <h3>Moving your products across all borders.</h3>
                <button type="button" class="btn btn-outline-light btn-lg">VIEW DEMO</button>
                <button type="button" class="btn btn-primary btn-lg">Get Started</button>
            </div>
        </div>
        <div class="carousel-item">
            <img src="img/background2.png">
        </div>
        <div class="carousel-item">
            <img src="img/background3.png">
        </div>

    </div>
     <a class="carousel-control-prev" href="#slides" 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="#slides" role="button" data-slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
  </a>

</div>

这是我的代码，幻灯片适用于 png 文件中的每张图片。但是 jpeg 图像根本不起作用。我试图将 jpg 的文件名更改为 png ，但仍然只有一些图像有效。我是引导程序的初学者

【问题讨论】：

请同时添加图片

标签： html css bootstrap-4 carousel

【解决方案1】：

适用于 jpgs...

如果你想添加jpgs，你必须convert pngs to jpgs。

    <!DOCTYPE html>
    <html lang="en">
    <head>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
    </head>
    <body>

    <div class="container">
      <div id="myCarousel" class="carousel slide" data-ride="carousel">
        <!-- Indicators -->
        <ol class="carousel-indicators">
          <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
          <li data-target="#myCarousel" data-slide-to="1"></li>
          <li data-target="#myCarousel" data-slide-to="2"></li>
        </ol>

        <!-- Wrapper for slides -->
        <div class="carousel-inner">
          <div class="item active">
            <img src="https://www.w3schools.com/bootstrap/ny.jpg" alt="Los Angeles" style="width:100%;">
          </div>

          <div class="item">
            <img src="https://www.w3schools.com/bootstrap/chicago.jpg" alt="Chicago" style="width:100%;">
          </div>

          <div class="item">
            <img src="https://www.w3schools.com/bootstrap/newyork.jpg" alt="New york" style="width:100%;">
          </div>
        </div>

        <!-- Left and right controls -->
        <a class="left carousel-control" href="#myCarousel" data-slide="prev">
          <span class="glyphicon glyphicon-chevron-left"></span>
          <span class="sr-only">Previous</span>
        </a>
        <a class="right carousel-control" href="#myCarousel" data-slide="next">
          <span class="glyphicon glyphicon-chevron-right"></span>
          <span class="sr-only">Next</span>
        </a>
      </div>
    </div>

    </body>
    </html>

<!-- end snippet -->

    <!DOCTYPE html>
    <html lang="en">
    <head>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
    </head>
    <body>

    <div class="container">
      <div id="myCarousel" class="carousel slide" data-ride="carousel">
        <!-- Indicators -->
        <ol class="carousel-indicators">
          <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
          <li data-target="#myCarousel" data-slide-to="1"></li>
          <li data-target="#myCarousel" data-slide-to="2"></li>
        </ol>

        <!-- Wrapper for slides -->
        <div class="carousel-inner">
          <div class="item active">
            <img src="https://www.w3schools.com/bootstrap/ny.jpg" alt="Los Angeles" style="width:100%;">
          </div>

          <div class="item">
            <img src="https://www.w3schools.com/bootstrap/chicago.jpg" alt="Chicago" style="width:100%;">
          </div>
        
          <div class="item">
            <img src="https://www.w3schools.com/bootstrap/newyork.jpg" alt="New york" style="width:100%;">
          </div>
        </div>

        <!-- Left and right controls -->
        <a class="left carousel-control" href="#myCarousel" data-slide="prev">
          <span class="glyphicon glyphicon-chevron-left"></span>
          <span class="sr-only">Previous</span>
        </a>
        <a class="right carousel-control" href="#myCarousel" data-slide="next">
          <span class="glyphicon glyphicon-chevron-right"></span>
          <span class="sr-only">Next</span>
        </a>
      </div>
    </div>

    </body>
    </html>

【讨论】：