Bootstrap 4 提供了不同样式的按钮。
<
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
>
尝试一下 »
按钮类可用于 ,
<
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
"
>
尝试一下 »
<
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
>
尝试一下 »
Bootstrap 4 可以设置按钮的大小：
<
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
>
尝试一下 »
通过添加 .btn-block 类可以设置块级按钮：
<
button
type
=
"
button
"
class
=
"
btn btn-primary btn-block
"
>
按钮 1
button
>
尝试一下 »
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 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。
<
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
>
尝试一下 »
我们也可以设置一个正在加载的按钮。
<
button
class
=
"
btn btn-primary
"
>
<
span
class
=
"
spinner-border spinner-border-sm
"
>
span
>
button
>
<
button
class
=
"
btn btn-primary
"
>
<
span
class
=
"
spinner-border spinner-border-sm
"
>
span
>
Loading..
button
>
<
button
class
=
"
btn btn-primary
"
disabled
>
<
span
class
=
"
spinner-border spinner-border-sm
"
>
span
>
Loading..
button
>
<
button
class
=
"
btn btn-primary
"
disabled
>
<
span
class
=
"
spinner-grow spinner-grow-sm
"
>
span
>
Loading..
button
>
尝试一下 »