站点中事件的触发往往依赖于button或者超链接。因此，button能够觉得是站点不可或缺的组件。
而BootStrap也包括了大量的button，可是与其它的库有非常大的差别。本文则是对怎样在BootStrap中使用button进行了解说。
button样式
不论什么仅仅要赋予了.btn这个类的Dom对象会自己主动继承默认样式：圆角灰色button。除此之外，BootStrap也提供了其它的样式选项，例如以下表所看到的：
| 类名 | 描写叙述 | 颜色 | 实例 |
| btn | Default/ Standard button. | White | <button type=”button”>Default Button</button> |
| btn-primary | Identifies the primary action . | Blue | <button type=”button”>Primary Button</button> |
| btn-success | Indicates a successful action. | Green | <button type=”button”>Success Button</button> |
| btn-warning | Indicates caution. | Yellow | <button type=”button”>Warning Button</button> |
| btn-danger | Indicates a dangerous action. | Red | <button type=”button”>Danger Button</button> |
| btn-link | Making a button look like link. | <button type=”button”>Link Button</button> |
button状态
BootStrap也提供了改动button状态：active或者disabled的类。
激活状态
button呈现为按下的状态（含阴影的深灰色背景），下表解释了使用方法。
| Element | Class | Description | Example |
| Button element | .active | Use .active class to show that it is activated. | <button type=”button”> Active Button </button> |
失效状态
当禁止某个button时。它的颜色会褪色50%而且失去其梯度权重。
| disabled | Add the disabled attribute to <button> buttons. | <button type=”button” disabled=”disabled”> Disabled Button | |
| Anchor element | Add the disabled class to <a> buttons. | <a href=”#” role=”button”> Disabled Link </a> |
button大小
| .btn-lg | This makes button size large. | Large Primary button |
| .btn-sm | This makes button size small. | Small Primary button |
| .btn-xs | This makes button size extra small. | Extra small Primary button |
| .btn-block | This creates block level buttons. | Block level Primary button |
完整的代码例如以下所看到的：
<!DOCTYPE html>
<html>
<head>
<title>Try Bootstrap Online</title>
<script data-require="jquery@*" data-semver="2.0.3" src="http://code.jquery.com/jquery-2.0.3.min.js"></script>
<script data-require="bootstrap@*" data-semver="3.1.1" src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<link data-require="[email protected]" data-semver="3.1.1" rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" />
</head>
<body>
<p>
<button type="button" class="btn btn-link btn-lg">Large link button
</button>
</p>
<p>
<button type="button" class="btn btn-primary">
Default size Primary button
</button></p><p>
<button type="button" class="btn btn-default">
Default normal size button
</button>
</p>
<p>
<button type="button" class="btn btn-warning btn-sm">
Small warning button
</button>
</p>
<p>
<button type="button" class="btn btn-success btn-xs">
Extra small success button
</button>
</p>
<p>
<button type="button" class="btn btn-primary btn-lg btn-block btn-lg active">
Block level Active Primary button
</button>
<button type="button" class="btn btn-danger btn-default btn-lg btn-block btn-lg disabled">
Danger Block Disabled button
</button>
</p>
</body>
</html> 
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