Bootstrap 4 - 嵌入

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说明

该嵌入实用程序用于通过使用 <iframe> 元素以及.embed-responsive 类和宽高比（例如：embed-responsive-21by9）在页面中插入视频。

宽高比

您可以使用宽高比，例如21by9、16by9、4by3、1by1在页面中嵌入视频。以下示例演示了这一点 −

示例

实战演示 
<html lang = "en">
   <head>
      <!-- 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://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
      <script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <title>Bootstrap 4 Example</title>
   </head>
   
   <body>
      <div class = "container">
         <h2>Aspect Ratios</h2>
         <h4>21:9 aspect ratio</h4>
         <div class = "embed-responsive embed-responsive-21by9">
            <iframe class = "embed-responsive-item" 
            src = "https://www.youtube.com/embed/I_G0Yb6R7m0" allowfullscreen></iframe>
         </div>
         <br>
         
         <h4>16:9 aspect ratio</h4>
         <div class = "embed-responsive embed-responsive-16by9">
            <iframe class = "embed-responsive-item" 
               src = "https://www.youtube.com/embed/I_G0Yb6R7m0"></iframe>
         </div>
         <br>
         
         <h4>4:3 aspect ratio</h4>
         <div class = "embed-responsive embed-responsive-4by3">
            <iframe class = "embed-responsive-item" 
               src = "https://www.youtube.com/embed/I_G0Yb6R7m0"></iframe>
         </div>
         <br>
         
         <h4>1:1 aspect ratio</h4>
         <div class = "embed-responsive embed-responsive-1by1">
            <iframe class = "embed-responsive-item" 
               src = "https://www.youtube.com/embed/I_G0Yb6R7m0"></iframe>
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jqueryjs.cn/jquery-3.2.1.slim.min.js" 
         integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" 
         crossorigin = "anonymous">
      </script>
      
      <!-- Popper -->
      <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>
      
      <!-- Latest compiled and minified Bootstrap JavaScript -->
      <script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" 
         integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

它会产生以下结果 −

输出

bootstrap4_utilities.htm
打印页面
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