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，更多请关注学步园其它相关文章！