1:Bootstrap 4 提供了不同样式的按钮。
<div class="container"> <h2>按钮样式</h2> <button type="button" class="btn">基本按钮</button> <button type="button" class="btn btn-primary">主要按钮</button> <button type="button" class="btn btn-secondary">次要按钮</button> <button type="button" class="btn btn-success">成功</button> <button type="button" class="btn btn-info">信息</button> <button type="button" class="btn btn-warning">警告</button> <button type="button" class="btn btn-danger">危险</button> <button type="button" class="btn btn-dark">黑色</button> <button type="button" class="btn btn-light">浅色</button> <button type="button" class="btn btn-link">链接</button> </div>
按钮类可用于 <a>, <button>, 或 <input> 元素上:
<a href="#" class="btn btn-info" role="button">链接按钮</a> <button type="button" class="btn btn-info">按钮</button> <input type="button" class="btn btn-info" value="输入框按钮"> <input type="submit" class="btn btn-info" value="提交按钮">
2:按钮设置边框
<div class="container"> <h2>按钮设置边框</h2> <button type="button" class="btn btn-outline-primary">主要按钮</button> <button type="button" class="btn btn-outline-secondary">次要按钮</button> <button type="button" class="btn btn-outline-success">成功</button> <button type="button" class="btn btn-outline-info">信息</button> <button type="button" class="btn btn-outline-warning">警告</button> <button type="button" class="btn btn-outline-danger">危险</button> <button type="button" class="btn btn-outline-dark">黑色</button> <button type="button" class="btn btn-outline-light text-dark">浅色</button> </div>
3:设置按钮的大小
<div class="container"> <h2>不同大小的按钮</h2> <button type="button" class="btn btn-primary btn-lg">大号按钮</button> <button type="button" class="btn btn-primary">默认按钮</button> <button type="button" class="btn btn-primary btn-sm">小号按钮</button> </div>
4:通过添加 .btn-block 类可以设置块级按钮
<div class="container"> <h2>块级按钮</h2> <button type="button" class="btn btn-primary btn-block">按钮 1</button> <button type="button" class="btn btn-default btn-block">按钮 2</button> <h2>大的块级按钮</h2> <button type="button" class="btn btn-primary btn-lg btn-block">按钮 1</button> <button type="button" class="btn btn-default btn-lg btn-block">按钮 2</button> <h2>小的块级按钮</h2> <button type="button" class="btn btn-primary btn-sm btn-block">按钮 1</button> <button type="button" class="btn btn-default btn-sm btn-block">按钮 2</button> </div>
5:激活和禁用的按钮
按钮可设置为激活或者禁止点击的状态。
.active 类可以设置按钮是可用的, disabled 属性可以设置按钮是不可点击的。 注意 <a> 元素不支持 disabled 属性,你可以通过添加 .disabled 类来禁止链接的点击。
<div class="container"> <h2>按钮状态</h2> <button type="button" class="btn btn-primary">主要按钮</button> <button type="button" class="btn btn-primary active">点击后的按钮</button> <button type="button" class="btn btn-primary" disabled>禁止点击的按钮</button> <a href="#" class="btn btn-primary disabled">禁止点击的链接</a> </div>