Bootstrap 4 - 輸入分組

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描述

使用輸入分組，您可以輕鬆地在基於文字的輸入前或後新增文字或按鈕。

基本輸入分組

您可以透過在 <div> 元素中新增 .input-group 類來建立一個輸入分組。使用 .input-group-prepend 類在輸入前新增文字，使用 .input-group-append 類在輸入後新增文字。透過新增 .input-group-text 類來設定指定文字的樣式。

以下示例演示了基本的輸入分組：

示例

線上演示 
<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.bootstrapcdn.com/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>Input Group</h2>
         <div class = "input-group mb-3">
            <div class = "input-group-prepend">
               <span class = "input-group-text" id = "basic-addon1">Username@</span>
            </div>
            <input type = "text" class = "form-control" placeholder = "Username" 
               aria-label = "Username" aria-describedby = "basic-addon1">
         </div>
         
         <div class = "input-group mb-3">
            <input type = "text" class = "form-control" 
               placeholder = "Recipient's username" aria-label = "Recipient's username" 
               aria-describedby = "basic-addon2">
            <div class = "input-group-append">
               <span class = "input-group-text" id = "basic-addon2">@tutorialspoint.com</span>
            </div>
         </div>
         
         <div class = "input-group mb-3">
            <div class = "input-group-prepend">
               <span class = "input-group-text">Price in $</span>
            </div>
            <input type = "text" class = "form-control" 
               aria-label = "Amount (to the nearest dollar)">
            
            <div class = "input-group-append">
               <span class = "input-group-text">.00</span>
            </div>
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/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.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

它將產生以下結果：

輸出

輸入分組大小

您可以使用 .input-group-sm 類建立小型輸入分組，使用 .input-group-lg 類建立大型輸入分組，如下例所示：

示例

線上演示 
<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.bootstrapcdn.com/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>Input Group Sizing</h2>
         <div class = "input-group input-group-lg">
            <div class = "input-group-prepend">
               <span class = "input-group-text" id = "inputGroup-sizing-lg">@</span>
            </div>
            <input type = "text" class = "form-control" aria-label = "Sizing example input" 
               aria-describedby = "inputGroup-sizing-lg" placeholder = "Large Input Group">
         </div>
         <br>
         
         <div class = "input-group mb-3">
            <div class = "input-group-prepend">
               <span class = "input-group-text" id = "inputGroup-sizing-default">@</span>
            </div>
            <input type = "text" class = "form-control" aria-label = "Sizing example input" 
               aria-describedby = "inputGroup-sizing-default" placeholder = "Default Input Group">
         </div>
         
         <div class = "input-group input-group-sm mb-3">
            <div class = "input-group-prepend">
               <span class = "input-group-text" id = "inputGroup-sizing-sm">@</span>
            </div>
            <input type = "text" class = "form-control" aria-label = "Sizing example input" 
               aria-describedby = "inputGroup-sizing-sm" placeholder = "Small Input Group">
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/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.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

它將產生以下結果：

輸出

複選框和單選按鈕

您可以在輸入分組中使用複選框和單選按鈕代替文字，如下例所示：

示例

線上演示 
<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.bootstrapcdn.com/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>Input Group with Checkbox and Radio Button</h2>
         <div class = "input-group mb-3">
            <div class = "input-group-prepend">
               <div class = "input-group-text">
                  <input type = "checkbox" aria-label = "Checkbox for following text input">
               </div>
            </div>
            <input type = "text" class = "form-control" 
               aria-label = "Text input with checkbox" placeholder = "Checkbox">
         </div>
         
         <div class = "input-group">
            <div class = "input-group-prepend">
               <div class = "input-group-text">
                  <input type = "radio" aria-label = "Radio button for following text input">
               </div>
            </div>
            <input type = "text" class = "form-control" 
               aria-label = "Text input with radio button" placeholder = "Radio button">
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/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.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

它將產生以下結果：

輸出

多個輸入

您可以向輸入分組新增多個輸入，如下例所示：

示例

線上演示 
<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.bootstrapcdn.com/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>Multiple Inputs</h2>
         <div class = "input-group">
            <div class = "input-group-prepend">
               <span class = "input-group-text">User Name and Password</span>
            </div>
            <input type = "email" aria-label = "User Name" class = "form-control">
            <input type = "password" aria-label = "Password" class = "form-control">
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/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.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

它將產生以下結果：

輸出

輸入分組按鈕和下拉按鈕

您可以在 .input-group 類中新增 .btn 類來在輸入分組中新增按鈕，也可以在 .input-group 類中新增下拉選單。

以下示例演示了新增輸入分組按鈕和下拉按鈕：

示例

線上演示 
<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.bootstrapcdn.com/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>Input Group Button</h2>
         <div class = "input-group mb-3">
            <div class = "input-group-prepend">
               <button class = "btn btn-outline-info" type = "button" 
                  id = "button-addon1">Button</button>
            </div>
            <input type = "text" class = "form-control" 
               placeholder = "Button in Input Group" 
               aria-label = "Example text with button addon" aria-describedby = "button-addon1">
         </div>
         
         <h2>Input Group with Dropdown Button</h2>
         <div class = "input-group mb-3">
            <div class = "input-group-prepend">
               <button class = "btn btn-outline-info dropdown-toggle" 
                  type = "button" data-toggle = "dropdown" 
                  aria-haspopup = "true" aria-expanded = "false">Dropdown</button>
               <div class = "dropdown-menu">
                  <a class = "dropdown-item" href = "#">Option #1</a>
                  <a class = "dropdown-item" href = "#">Option #2</a>
                  <a class = "dropdown-item" href = "#">Option #3</a>
                  <div role = "separator" class = "dropdown-divider"></div>
                  <a class = "dropdown-item" href = "#">Option #4</a>
               </div>
            </div>
            <input type = "text" class = "form-control" 
               aria-label = "Text input with dropdown button" 
               placeholder = "Dropdown in Input Group">
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/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.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

它將產生以下結果：

輸出

自定義表單

您可以在輸入分組中建立自定義選擇和自定義檔案輸入。以下示例演示了這一點：

示例

線上演示 
<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.bootstrapcdn.com/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>Custom Select</h2>
         <div class = "input-group mb-3">
            <div class = "input-group-prepend">
               <label class = "input-group-text" for = "inputGroupSelect01">Select Options</label>
            </div>
            <select class = "custom-select" id = "inputGroupSelect01">
               <option selected>Select</option>
               <option value = "1">Option #1</option>
               <option value = "2">Option #2</option>
               <option value = "3">Option #3</option>
            </select>
         </div>
         
         <h2>Custom File Input</h2>
         <div class = "input-group mb-3">
            <div class = "input-group-prepend">
               <span class = "input-group-text" id = "inputGroupFileAddon01">Attach Files</span>
            </div>
            
            <div class = "custom-file">
               <input type = "file" class = "custom-file-input" 
                  id = "inputGroupFile01" aria-describedby = "inputGroupFileAddon01">
               <label class = "custom-file-label" for = "inputGroupFile01">Choose Files</label>
            </div>
            
         </div>
      </div>
      
      <!-- jQuery first, then Popper.js, then Bootstrap JS -->
      <script src = "https://code.jquery.com/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.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" 
         integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" 
         crossorigin = "anonymous">
      </script>
      
   </body>
</html>

它將產生以下結果：

輸出

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