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推荐教程：Bootstrap教程

1、Bootstrap4 输入框组

　　我们可以使用 .input-group 类来向表单输入框中添加更多的样式，如图标、文本或者按钮。使用 .input-group-prepend 类可以在输入框的的前面添加文本信息， .input-group-append 类添加在输入框的后面。最后，我们还需要使用 .input-group-text 类来设置文本的样式。

<form>  <div class="input-group mb-3">    <div class="input-group-prepend">      <span class="input-group-text">@</span>    </div>    <input type="text" class="form-control" placeholder="Username">  </div>  <div class="input-group mb-3">    <input type="text" class="form-control" placeholder="Your Email">    <div class="input-group-append">      <span class="input-group-text">@runoob.com</span>    </div>  </div></form>

　　效果图：

2、输入框大小

　　使用 .input-group-sm 类来设置小的输入框， .input-group-lg 类设置大的输入框：

<form>  <div class="input-group mb-3 input-group-sm">     <div class="input-group-prepend">       <span class="input-group-text">Small</span>    </div>    <input type="text" class="form-control">  </div></form><form>  <div class="input-group mb-3">    <div class="input-group-prepend">      <span class="input-group-text">Default</span>    </div>    <input type="text" class="form-control">  </div></form><form>  <div class="input-group mb-3 input-group-lg">    <div class="input-group-prepend">      <span class="input-group-text">Large</span>    </div>    <input type="text" class="form-control">  </div></form>

3、多个输入框和文本

<!-- 多个输入框 --><form>  <div class="input-group mb-3">    <div class="input-group-prepend">      <span class="input-group-text">Person</span>    </div>    <input type="text" class="form-control" placeholder="First Name">    <input type="text" class="form-control" placeholder="Last Name">  </div></form> <!-- 多个文本信息 --><form>  <div class="input-group mb-3">    <div class="input-group-prepend">      <span class="input-group-text">One</span>      <span class="input-group-text">Two</span>      <span class="input-group-text">Three</span>    </div>    <input type="text" class="form-control">  </div></form>

4、复选框与单选框

<div class="input-group mb-3">  <div class="input-group-prepend">    <div class="input-group-text">      <input type="checkbox">     </div>  </div>  <input type="text" class="form-control" placeholder="RUNOOB"></div> <div class="input-group mb-3">  <div class="input-group-prepend">    <div class="input-group-text">      <input type="radio">     </div>  </div>  <input type="text" class="form-control" placeholder="GOOGLE"></div>

　　效果图：

5、输入框加按钮组

<div class="input-group mb-3">  <div class="input-group-prepend">    <button class="btn btn-outline-secondary" type="button">Basic Button</button>   </div>  <input type="text" class="form-control" placeholder="Some text"></div> <div class="input-group mb-3">  <input type="text" class="form-control" placeholder="Search">  <div class="input-group-append">    <button class="btn btn-success" type="submit">Go</button>   </div></div> <div class="input-group mb-3">  <input type="text" class="form-control" placeholder="Something clever..">  <div class="input-group-append">    <button class="btn btn-primary" type="button">OK</button>     <button class="btn btn-danger" type="button">Cancel</button>   </div></div>

6、设置下拉菜单

<div class="input-group mt-3 mb-3">  <div class="input-group-prepend">    <button type="button" class="btn btn-outline-secondary dropdown-toggle" data-toggle="dropdown">      选择网站    </button>    <div class="dropdown-menu">      <a class="dropdown-item" href="https://www.google.com">GOOGLE</a>      <a class="dropdown-item" href="https://www.runoob.com">RUNOOB</a>      <a class="dropdown-item" href="https://www.taobao.com">TAOBAO</a>    </div>  </div>  <input type="text" class="form-control" placeholder="网站地址"></div>

　　效果图：

7、输入框组标签

　　在输入框组通过在输入框组外围的 label 来设置标签，标签的 for 属性需要与输入框组的 id 对应，点击标签后可以聚焦输入框：

<label for="demo">Write your email here:</label><div class="input-group mb-3">  <input type="text" class="form-control" placeholder="Email" id="demo" name="email">  <div class="input-group-append">    <span class="input-group-text">@runoob.com</span>  </div></div>

　　效果图：

以上就是bootstrap输入框组有哪些的详细内容，更多请关注9543建站博客其它相关文章！