【Bootstrap V4系列】学习入门教程之组件-输入组（Input group）

Bootstrap V4系列学习入门教程之组件-输入组（Input group）

[输入组（Input group）](#输入组（Input group）)
- [Basic example](#Basic example)
- [一、Wrapping 包装](#一、Wrapping 包装)
- [二、Sizing 尺寸](#二、Sizing 尺寸)
- [三、Multiple addons 多个插件](#三、Multiple addons 多个插件)
- [四、Button addons 按钮插件](#四、Button addons 按钮插件)
- [五、Buttons with dropdowns 带下拉按钮](#五、Buttons with dropdowns 带下拉按钮)
- [六、Custom forms 自定义表单](#六、Custom forms 自定义表单)
- - [6.1 Custom select 自定义选择](#6.1 Custom select 自定义选择)
  - [6.2 Custom file input 自定义文件输入](#6.2 Custom file input 自定义文件输入)

输入组（Input group）

通过在文本输入、自定义选择和自定义文件输入的任一侧添加文本、按钮或按钮组，可以轻松扩展表单控件。

Basic example

在输入的两侧放置一个插件或按钮。您也可以在输入的两侧放置一个。记住将<label>s放在输入组之外。

html 复制代码

<!--Basic example-->
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon1">@</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">@example.com</span>
    </div>
</div>

<label for="basic-url">Your vanity URL</label>
<div class="input-group mb-3">
    <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon3">https://example.com/users/</span>
    </div>
    <input type="text" class="form-control" id="basic-url" aria-describedby="basic-addon3">
</div>

<div class="input-group mb-3">
    <div class="input-group-prepend">
        <span class="input-group-text">$</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 class="input-group">
    <div class="input-group-prepend">
        <span class="input-group-text">With textarea</span>
    </div>
    <textarea class="form-control" aria-label="With textarea"></textarea>
</div>

页面展示效果：

一、Wrapping 包装

默认情况下，输入组通过flex-wrap:wrap 进行包装，以适应输入组内的自定义表单字段验证。您可以使用.flex-nowrap 禁用此功能。

html 复制代码

<div class="input-group flex-nowrap">
  <div class="input-group-prepend">
    <span class="input-group-text" id="addon-wrapping">@</span>
  </div>
  <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="addon-wrapping">
</div>

页面展示效果：

二、Sizing 尺寸

将相对的表单大小类添加到.input-group 组本身，其中的内容将自动调整大小------不需要在每个元素上重复表单控件大小类。

不支持对单个输入组元素进行大小调整。

html 复制代码

<div class="input-group input-group-sm mb-3">
  <div class="input-group-prepend">
    <span class="input-group-text" id="inputGroup-sizing-sm">Small</span>
  </div>
  <input type="text" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-sm">
</div>

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <span class="input-group-text" id="inputGroup-sizing-default">Default</span>
  </div>
  <input type="text" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-default">
</div>

<div class="input-group input-group-lg">
  <div class="input-group-prepend">
    <span class="input-group-text" id="inputGroup-sizing-lg">Large</span>
  </div>
  <input type="text" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-lg">
</div>

页面展示效果：

三、Multiple addons 多个插件

支持多个附加组件，可以与复选框和单选框输入版本混合使用。

html 复制代码

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <span class="input-group-text">$</span>
    <span class="input-group-text">0.00</span>
  </div>
  <input type="text" class="form-control" aria-label="Dollar amount (with dot and two decimal places)">
</div>

<div class="input-group">
  <input type="text" class="form-control" aria-label="Dollar amount (with dot and two decimal places)">
  <div class="input-group-append">
    <span class="input-group-text">$</span>
    <span class="input-group-text">0.00</span>
  </div>
</div>

页面展示效果：

四、Button addons 按钮插件

html 复制代码

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <button class="btn btn-outline-secondary" type="button" id="button-addon1">Button</button>
  </div>
  <input type="text" class="form-control" placeholder="" aria-label="Example text with button addon" aria-describedby="button-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="button-addon2">
  <div class="input-group-append">
    <button class="btn btn-outline-secondary" type="button" id="button-addon2">Button</button>
  </div>
</div>

<div class="input-group mb-3">
  <div class="input-group-prepend" id="button-addon3">
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <button class="btn btn-outline-secondary" type="button">Button</button>
  </div>
  <input type="text" class="form-control" placeholder="" aria-label="Example text with two button addons" aria-describedby="button-addon3">
</div>

<div class="input-group">
  <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username with two button addons" aria-describedby="button-addon4">
  <div class="input-group-append" id="button-addon4">
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <button class="btn btn-outline-secondary" type="button">Button</button>
  </div>
</div>

页面展示效果：

五、Buttons with dropdowns 带下拉按钮

html 复制代码

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="#">Action</a>
      <a class="dropdown-item" href="#">Another action</a>
      <a class="dropdown-item" href="#">Something else here</a>
      <div role="separator" class="dropdown-divider"></div>
      <a class="dropdown-item" href="#">Separated link</a>
    </div>
  </div>
  <input type="text" class="form-control" aria-label="Text input with dropdown button">
</div>

<div class="input-group">
  <input type="text" class="form-control" aria-label="Text input with dropdown button">
  <div class="input-group-append">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="#">Action</a>
      <a class="dropdown-item" href="#">Another action</a>
      <a class="dropdown-item" href="#">Something else here</a>
      <div role="separator" class="dropdown-divider"></div>
      <a class="dropdown-item" href="#">Separated link</a>
    </div>
  </div>
</div>

页面展示效果：

六、Custom forms 自定义表单

输入组包括对自定义选择和自定义文件输入的支持。不支持这些的浏览器默认版本。

6.1 Custom select 自定义选择

html 复制代码

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <label class="input-group-text" for="inputGroupSelect01">Options</label>
  </div>
  <select class="custom-select" id="inputGroupSelect01">
    <option selected>Choose...</option>
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
  </select>
</div>

<div class="input-group mb-3">
  <select class="custom-select" id="inputGroupSelect02">
    <option selected>Choose...</option>
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
  </select>
  <div class="input-group-append">
    <label class="input-group-text" for="inputGroupSelect02">Options</label>
  </div>
</div>

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <button class="btn btn-outline-secondary" type="button">Button</button>
  </div>
  <select class="custom-select" id="inputGroupSelect03" aria-label="Example select with button addon">
    <option selected>Choose...</option>
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
  </select>
</div>

<div class="input-group">
  <select class="custom-select" id="inputGroupSelect04" aria-label="Example select with button addon">
    <option selected>Choose...</option>
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
  </select>
  <div class="input-group-append">
    <button class="btn btn-outline-secondary" type="button">Button</button>
  </div>
</div>

页面展示效果：

6.2 Custom file input 自定义文件输入

此示例使用自定义文件浏览器组件，该组件依赖于单独的 bs-custom-file-input 自定义文件输入插件。

html 复制代码

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <span class="input-group-text" id="inputGroupFileAddon01">Upload</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 file</label>
  </div>
</div>

<div class="input-group mb-3">
  <div class="custom-file">
    <input type="file" class="custom-file-input" id="inputGroupFile02">
    <label class="custom-file-label" for="inputGroupFile02" aria-describedby="inputGroupFileAddon02">Choose file</label>
  </div>
  <div class="input-group-append">
    <span class="input-group-text" id="inputGroupFileAddon02">Upload</span>
  </div>
</div>

<div class="input-group mb-3">
  <div class="input-group-prepend">
    <button class="btn btn-outline-secondary" type="button" id="inputGroupFileAddon03">Button</button>
  </div>
  <div class="custom-file">
    <input type="file" class="custom-file-input" id="inputGroupFile03" aria-describedby="inputGroupFileAddon03">
    <label class="custom-file-label" for="inputGroupFile03">Choose file</label>
  </div>
</div>

<div class="input-group">
  <div class="custom-file">
    <input type="file" class="custom-file-input" id="inputGroupFile04" aria-describedby="inputGroupFileAddon04">
    <label class="custom-file-label" for="inputGroupFile04">Choose file</label>
  </div>
  <div class="input-group-append">
    <button class="btn btn-outline-secondary" type="button" id="inputGroupFileAddon04">Button</button>
  </div>
</div>

页面展示效果：

自定义文件输入插件:

javascript 复制代码

<script src="https://cdn.jsdelivr.net/npm/bs-custom-file-input/dist/bs-custom-file-input.js"></script>

您应该等待文档就绪事件，并调用init方法使您的自定义文件输入动态。我们公开了一个随处可用的全局变量：bsCustomFileInput

javascript 复制代码

<script>
    $(document).ready(function () {
        bsCustomFileInput.init()
    })
</script>

一切准备就绪后，你应该看到页面的上传效果：

【Bootstrap V4系列】学习入门教程之 组件-输入组（Input group）

Bootstrap V4系列 学习入门教程之 组件-输入组（Input group）

输入组（Input group）

Basic example

一、Wrapping 包装

二、Sizing 尺寸

三、Multiple addons 多个插件

四、Button addons 按钮插件

五、Buttons with dropdowns 带下拉按钮

六、Custom forms 自定义表单

6.1 Custom select 自定义选择

6.2 Custom file input 自定义文件输入

【Bootstrap V4系列】学习入门教程之组件-输入组（Input group）

Bootstrap V4系列学习入门教程之组件-输入组（Input group）