Bootstrap4 输入框组

我们可以使用 .input-group 类来向表单输入框中添加更多的样式，如图标、文本或者按钮。

使用 .input-group-prepend 类可以在输入框的的前面添加文本信息， .input-group-append 类添加在输入框的后面。

最后，我们还需要使用 .input-group-text 类来设置文本的样式。

Bootstrap4 实例

<
form
>

<
div

class
=
"
input-group mb-3
"
>

<
div

class
=
"
input-group-prepend
"
>

<
span

class
=
"
input-group-text
"
>
@
span
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
Username
"
>

div
>

<
div

class
=
"
input-group mb-3
"
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
Your Email
"
>

<
div

class
=
"
input-group-append
"
>

<
span

class
=
"
input-group-text
"
>
@XWCX.NET
span
>

div
>

div
>

form
>

尝试一下 »

输入框大小

使用 .input-group-sm 类来设置小的输入框， .input-group-lg 类设置大的输入框：

Bootstrap4 实例

<
form
>

<
div

class
=
"
input-group mb-3 input-group-sm
"
>

<
div

class
=
"
input-group-prepend
"
>

<
span

class
=
"
input-group-text
"
>
Small
span
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"
>

div
>

form
>

<
form
>

<
div

class
=
"
input-group mb-3
"
>

<
div

class
=
"
input-group-prepend
"
>

<
span

class
=
"
input-group-text
"
>
Default
span
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"
>

div
>

form
>

<
form
>

<
div

class
=
"
input-group mb-3 input-group-lg
"
>

<
div

class
=
"
input-group-prepend
"
>

<
span

class
=
"
input-group-text
"
>
Large
span
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"
>

div
>

form
>

尝试一下 »

多个输入框和文本

Bootstrap4 实例

<
form
>

<
div

class
=
"
input-group mb-3
"
>

<
div

class
=
"
input-group-prepend
"
>

<
span

class
=
"
input-group-text
"
>
Person
span
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
First Name
"
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
Last Name
"
>

div
>

form
>



<
form
>

<
div

class
=
"
input-group mb-3
"
>

<
div

class
=
"
input-group-prepend
"
>

<
span

class
=
"
input-group-text
"
>
One
span
>

<
span

class
=
"
input-group-text
"
>
Two
span
>

<
span

class
=
"
input-group-text
"
>
Three
span
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"
>

div
>

form
>

尝试一下 »

复选框与单选框

文本信息可以使用复选框与单选框替代：

Bootstrap4 实例

<
div

class
=
"
input-group mb-3
"
>

<
div

class
=
"
input-group-prepend
"
>

<
div

class
=
"
input-group-text
"
>

<
input

type
=
"
checkbox
"
>

div
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
RUNOOB
"
>

div
>

<
div

class
=
"
input-group mb-3
"
>

<
div

class
=
"
input-group-prepend
"
>

<
div

class
=
"
input-group-text
"
>

<
input

type
=
"
radio
"
>

div
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
GOOGLE
"
>

div
>

尝试一下 »

输入框添加按钮组

Bootstrap4 实例

<
div

class
=
"
input-group mb-3
"
>

<
div

class
=
"
input-group-prepend
"
>

<
button

class
=
"
btn btn-outline-secondary
"

type
=
"
button
"
>
Basic Button
button
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
Some text
"
>

div
>

<
div

class
=
"
input-group mb-3
"
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
Search
"
>

<
div

class
=
"
input-group-append
"
>

<
button

class
=
"
btn btn-success
"

type
=
"
submit
"
>
Go
button
>

div
>

div
>

<
div

class
=
"
input-group mb-3
"
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
Something clever..
"
>

<
div

class
=
"
input-group-append
"
>

<
button

class
=
"
btn btn-primary
"

type
=
"
button
"
>
OK
button
>

<
button

class
=
"
btn btn-danger
"

type
=
"
button
"
>
Cancel
button
>

div
>

div
>

尝试一下 »

设置下拉菜单

输入框中添加下拉菜单不需要使用 .dropdown 类。

Bootstrap4 实例

<
div

class
=
"
input-group mt-3 mb-3
"
>

<
div

class
=
"
input-group-prepend
"
>

<
button

type
=
"
button
"

class
=
"
btn btn-outline-secondary dropdown-toggle
"

data-toggle
=
"
dropdown
"
>
选择网站
button
>

<
div

class
=
"
dropdown-menu
"
>

<
a

class
=
"
dropdown-item
"

href
=
"
https://www.google.com
"
>
GOOGLE
a
>

<
a

class
=
"
dropdown-item
"

href
=
"
https://www.XWCX.NET
"
>
RUNOOB
a
>

<
a

class
=
"
dropdown-item
"

href
=
"
https://www.taobao.com
"
>
TAOBAO
a
>

div
>

div
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
网站地址
"
>

div
>

尝试一下 »

输入框组标签

在输入框组通过在输入框组外围的 label 来设置标签，标签的 for 属性需要与输入框组的 id 对应，点击标签后可以聚焦输入框：

Bootstrap4 实例

<
label

for
=
"
demo
"
>
Write your email here:
label
>

<
div

class
=
"
input-group mb-3
"
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
Email
"

id
=
"
demo
"

name
=
"
email
"
>

<
div

class
=
"
input-group-append
"
>

<
span

class
=
"
input-group-text
"
>
@XWCX.NET
span
>

div
>

div
>

尝试一下 »

名称栏目：创新互联Bootstrap4教程：Bootstrap4输入框组
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