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。

Bootstrap4 实例

<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>

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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:

Bootstrap4 实例

<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>

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多个输入框和文本

Bootstrap4 实例

<!-- 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>

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复选框与单选框

文本信息可以使用复选框与单选框替代:

Bootstrap4 实例

<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>

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输入框添加按钮组

Bootstrap4 实例

<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>

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设置下拉菜单

输入框中添加下拉菜单不需要使用 .dropdown 类。

Bootstrap4 实例

<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="http://study.p2hp.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>

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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:

Bootstrap4 实例

<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>

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