按钮
可作为按钮使用的标签或元素
为 <a>
、<button>
或 <input>
元素添加按钮类(button class)即可使用 Bootstrap 提供的样式。
<a class="btn btn-default" href="#" role="button">Link</a> <button class="btn btn-default" type="submit">Button</button> <input class="btn btn-default" type="button" value="Input"> <input class="btn btn-default" type="submit" value="Submit">
预定义样式
使用下面列出的类可以快速创建一个带有预定义样式的按钮。
<!-- Standard button --> <button type="button" class="btn btn-default">(默认样式)Default</button> <!-- Provides extra visual weight and identifies the primary action in a set of buttons --> <button type="button" class="btn btn-primary">(首选项)Primary</button> <!-- Indicates a successful or positive action --> <button type="button" class="btn btn-success">(成功)Success</button> <!-- Contextual button for informational alert messages --> <button type="button" class="btn btn-info">(一般信息)Info</button> <!-- Indicates caution should be taken with this action --> <button type="button" class="btn btn-warning">(警告)Warning</button> <!-- Indicates a dangerous or potentially negative action --> <button type="button" class="btn btn-danger">(危险)Danger</button> <!-- Deemphasize a button by making it look like a link while maintaining button behavior --> <button type="button" class="btn btn-link">(链接)Link</button>
尺寸
需要让按钮具有不同尺寸吗?使用 .btn-lg
、.btn-sm
或 .btn-xs
就可以获得不同尺寸的按钮。
<p> <button type="button" class="btn btn-primary btn-lg">(大按钮)Large button</button> <button type="button" class="btn btn-default btn-lg">(大按钮)Large button</button> </p> <p> <button type="button" class="btn btn-primary">(默认尺寸)Default button</button> <button type="button" class="btn btn-default">(默认尺寸)Default button</button> </p> <p> <button type="button" class="btn btn-primary btn-sm">(小按钮)Small button</button> <button type="button" class="btn btn-default btn-sm">(小按钮)Small button</button> </p> <p> <button type="button" class="btn btn-primary btn-xs">(超小尺寸)Extra small button</button> <button type="button" class="btn btn-default btn-xs">(超小尺寸)Extra small button</button> </p>
通过给按钮添加 .btn-block
类可以将其拉伸至父元素100%的宽度,而且按钮也变为了块级(block)元素。
<button type="button" class="btn btn-primary btn-lg btn-block">(块级元素)Block level button</button> <button type="button" class="btn btn-default btn-lg btn-block">(块级元素)Block level button</button>
禁用状态
button 元素
为 <button>
元素添加 disabled
属性,使其表现出禁用状态。
<button type="button" class="btn btn-lg btn-primary" disabled="disabled">Primary button</button> <button type="button" class="btn btn-default btn-lg" disabled="disabled">Button</button>
链接(<a>
)元素
为基于 <a>
元素创建的按钮添加 .disabled
类。
<a href="#" class="btn btn-primary btn-lg disabled" role="button">Primary link</a> <a href="#" class="btn btn-default btn-lg disabled" role="button">Link</a>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"> <link rel="stylesheet" href="bootstrap-3.4.1-dist/css/bootstrap.min.css"> <script src="../js/jquery-3.3.1.min.js"></script> <script src="bootstrap-3.4.1-dist/js/bootstrap.min.js"></script> </head> <body> <a href="https://www.baidu.com/" class="btn btn-primary">首选项</a> <button class="btn btn-danger">危险</button> <button class="btn btn-default">默认样式</button> <button class="btn btn-success">成功</button> <button class="btn btn-info">一般信息</button> <button class="btn btn-warning">警告</button> <button class="btn btn-warning btn-lg">大按钮</button> <button class="btn btn-warning btn-sm">小按钮</button> <button class="btn btn-warning btn-xs">超小尺寸</button> <input type="submit" class="btn btn-primary btn-block"> <!-- 通过给按钮添加 .btn-block 类可以将其拉伸至父元素100%的宽度,而且按钮也变为了块级(block)元素--> <button class="btn btn-warning" disabled="disabled">警告</button> <!-- 为 <button> 元素添加 disabled 属性,使其表现出禁用状态--> </body> </html>