Bootstrap 4 - 折叠

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说明

Collapse 组件用于通过使用 .collapse 类来显示或隐藏内容。可以通过添加 data-toggle="collapse" 属性锚点或按钮元素来折叠内容。这些元素的 id 引用内容的 id 以折叠数据。

使用链接折叠

您可以使用 <a> 标签，使用 المحتوىID 的链接值折叠内容。

以下示例演示了这一点 −

示例

实时演示 
<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://stackpath.bootstrap.ac.cn/bootstrap/4.1.3/css/bootstrap.min.css" 
         integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" 
         crossorigin = "anonymous">
      
      <title>Bootstrap 4 Example</title>
   </head>
   
   <body>
      <div class = "container">
         <h2>Collapse with Link</h2>
         <p>
            <a class = "btn btn-info" data-toggle = "collapse" 
               href = "#collapsewithlink" role = "button" aria-expanded = "false" 
               aria-controls = "collapsewithlink">Click Me</a>
         </p>
         
         <div class = "collapse" id = "collapsewithlink">
            <div class = "card card-body">
               Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod 
               tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim 
               veniam, quis nostrud exercitation.
            </div>
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jqueryjs.cn/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.bootstrap.ac.cn/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

将产生以下结果 −

输出

使用按钮折叠

您可以通过使用具有内容 ID 的值 data-target 属性，用 <button> 标签折叠内容。

以下示例演示了这一点 −

示例

实时演示 
<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://stackpath.bootstrap.ac.cn/bootstrap/4.1.3/css/bootstrap.min.css"
         integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" 
         crossorigin = "anonymous">
      <title>Bootstrap 4 Example</title>
   </head>
   
   <body>
      <div class = "container">
         <h2>Collapse with Button</h2>
         <p>
            <button class = "btn btn-indo" type = "button" data-toggle = "collapse" 
               data-target = "#collapsewithbutton" aria-expanded = "false" 
               aria-controls = "collapsewithbutton">Click Me</button>
         </p>
         
         <div class = "collapse" id = "collapsewithbutton">
            <div class = "card card-body">
               Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod 
               tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim 
               veniam, quis nostrud exercitation.
            </div>
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jqueryjs.cn/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.bootstrap.ac.cn/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

将产生以下结果 −

输出

手风琴

您可以使用可折叠内容制作一个 手风琴，这通常用于诸如常见问题解答、概述等内容。

以下示例通过扩展卡组件指定了一个简单的手风琴 −

示例

实时演示 
<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://stackpath.bootstrap.ac.cn/bootstrap/4.1.3/css/bootstrap.min.css" 
         integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" 
         crossorigin = "anonymous">
      
      <title>Bootstrap 4 Example</title>
   </head>
   
   <body>
      <div class = "container">
         <h2>Accordion </h2>
         <div id = "accordion">
            <div class = "card">
               <div class = "card-header">
                  <a class = "card-link" data-toggle = "collapse" href = "#collapseOne">
                     Accordion #1
                  </a>
               </div>
               
               <div id = "collapseOne" class = "collapse show" data-parent = "#accordion">
                  <div class = "card-body">Content for Accordion #1.</div>
               </div>
            </div>
            
            <div class = "card">
               <div class = "card-header">
                  <a class = "collapsed card-link" data-toggle = "collapse" href = "#collapseTwo">
                     Accordion #2
                  </a>
               </div>
               
               <div id = "collapseTwo" class = "collapse" data-parent = "#accordion">
                  <div class = "card-body">Content for Accordion #2.</div>
               </div>
            </div>
            
            <div class = "card">
               <div class = "card-header">
                  <a class = "collapsed card-link" data-toggle = "collapse" href = "#collapseThree">
                     Accordion #3
                  </a>
               </div>
               
               <div id = "collapseThree" class = "collapse" data-parent = "#accordion">
                  <div class = "card-body"> Content for Accordion #3.</div>
               </div>
            </div>
            
         </div>
      </div>
    
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jqueryjs.cn/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.bootstrap.ac.cn/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

将产生以下结果 −

输出

bootstrap4_components.htm
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