模态框(Modal)是覆盖在父窗体上的子窗体。通常,目的是显示来自一个单独的源的内容,可以在不离开父窗体的情况下有一些互动。子窗体可提供信息交互等。

以下实例创建了一个简单的模态框效果 :
 
<
button
 
type
=
"
button
"
 
class
=
"
btn btn-primary
"
 
data-toggle
=
"
modal
"
 
data-target
=
"
#myModal
"
>
 打开模态框 
button
>
 
 
<
div
 
class
=
"
modal fade
"
 
id
=
"
myModal
"
>
 
<
div
 
class
=
"
modal-dialog
"
>
 
<
div
 
class
=
"
modal-content
"
>
 
 
<
div
 
class
=
"
modal-header
"
>
 
<
h4
 
class
=
"
modal-title
"
>
模态框头部
h4
>
 
<
button
 
type
=
"
button
"
 
class
=
"
close
"
 
data-dismiss
=
"
modal
"
>
×
button
>
 
div
>
 
 
<
div
 
class
=
"
modal-body
"
>
 模态框内容.. 
div
>
 
 
<
div
 
class
=
"
modal-footer
"
>
 
<
button
 
type
=
"
button
"
 
class
=
"
btn btn-secondary
"
 
data-dismiss
=
"
modal
"
>
关闭
button
>
 
div
>
 
div
>
 
div
>
 
div
>
 尝试一下 » 
我们可以通过添加 .modal-sm 类来创建一个小模态框,.modal-lg 类可以创建一个大模态框。
尺寸类放在
<
div
 
class
=
"
modal-dialog modal-sm
"
>
 尝试一下 » 
<
div
 
class
=
"
modal-dialog modal-lg
"
>
 尝试一下 »