Bootstrap5 表单浮动标签
默认情况下，标签内容一般显示在 input 输入框的上方：
Bootstrap 实例
<
div
class
=
"
form-floating mb-3 mt-3
"
>
<
input
type
=
"
text
"
class
=
"
form-control
"
id
=
"
email
"
placeholder
=
"
Enter email
"
name
=
"
email
"
>
<
label
for
=
"
email
"
>
Email
</
label
>
</
div
>
<
div
class
=
"
form-floating mt-3 mb-3
"
>
<
input
type
=
"
text
"
class
=
"
form-control
"
id
=
"
pwd
"
placeholder
=
"
Enter password
"
name
=
"
pswd
"
>
<
label
for
=
"
pwd
"
>
Password
</
label
>
</
div
>
尝试一下 »
注意事项： <label> 元素必须在 <input> 元素之后，并且每个 <input> 元素都需要 placeholder 属性。
文本框
文本框 textarea 也可以有浮动效果：
Bootstrap 实例
<
div
class
=
"
form-floating
"
>
<
textarea
class
=
"
form-control
"
id
=
"
comment
"
name
=
"
text
"
placeholder
=
"
Comment goes here
"
>
</
textarea
>
<
label
for
=
"
comment
"
>
Comments
</
label
>
</
div
>
尝试一下 »
选择框
我们可以在选择菜单上使用浮动标签，它将始终显示在选择菜单的左上角，不会有点击浮动效果：
Bootstrap 实例
<
div
class
=
"
form-floating
"
>
<
select
class
=
"
form-select
"
id
=
"
sel1
"
name
=
"
sellist
"
>
<
option
>
1
</
option
>
<
option
>
2
</
option
>
<
option
>
3
</
option
>
<
option
>
4
</
option
>
</
select
>
<
label
for
=
"
sel1
"
class
=
"
form-label
"
>
Select list (select one):
</
label
>
</
div
>
尝试一下 »
