Bootstrap5 表单

在本章中，我们将学习如何使用 Bootstrap 创建表单。Bootstrap 通过一些简单的 HTML 标签和扩展的类即可创建出不同样式的表单。

表单元素 <input> , <textarea> , 和 <select> elements 在使用 .form-control 类的情况下，宽度都是设置为 100%。

Bootstrap5 表单布局

  • 堆叠表单 (全屏宽度)：垂直方向
  • 内联表单：水平方向

Bootstrap 提供了两种类型的表单布局:

堆叠表单

以下实例使用两个输入框，一个复选框，一个提交按钮来创建堆叠表单：

实例

< form > < div class = " mb-3 mt-3 " > < label for = " email " class = " form-label " > Email: </ label > < input type = " email " class = " form-control " id = " email " placeholder = " Enter email " name = " email " > </ div > < div class = " mb-3 " > < label for = " pwd " class = " form-label " > Password: </ label > < input type = " password " class = " form-control " id = " pwd " placeholder = " Enter password " name = " pswd " > </ div > < div class = " form-check mb-3 " > < label class = " form-check-label " > < input class = " form-check-input " type = " checkbox " name = " remember " > Remember me </ label > </ div > < button type = " submit " class = " btn btn-primary " > Submit </ button > </ form >

尝试一下 »

显示效果：

实例中我们使用 .form-label 类来确保标签元素有一定的内边距。

复选框（checkboxe）使用不同的标记。 它们使用 .form-check 包裹在容器元素周围。复选框和单选按钮使用 .form-check-input ，它的标签可以使用 .form-check-label 类。

内联表单

如果您希望表单元素并排显示，请使用 .row 和 .col ：

以下实例的两个输入框并排显示，创建内联表单：

实例

< form > < div class = " row " > < div class = " col " > < input type = " text " class = " form-control " placeholder = " Enter email " name = " email " > </ div > < div class = " col " > < input type = " password " class = " form-control " placeholder = " Enter password " name = " pswd " > </ div > </ div > </ form >

尝试一下 »

显示效果：

文本框

使用 textarea 标签创建文本框提交表单，使用 .form-control 类渲染文本框 textareas 标签:

实例

< label for = " comment " > 请输入评论： </ label > < textarea class = " form-control " rows = " 5 " id = " comment " name = " text " > </ textarea >

尝试一下 »

显示效果：

输入框大小

我们可以通过在 .form-control 输入框中使用 .form-control-lg 或 .form-control-sm 类来设置输入框的大小:

实例

< input type = " text " class = " form-control form-control-lg " placeholder = " 大号输入框 " > < input type = " text " class = " form-control " placeholder = " 正常大小输入框 " > < input type = " text " class = " form-control form-control-sm " placeholder = " 小号输入框 " >

尝试一下 »

显示效果：

禁用/只读表单

使用 disabled/readonly 属性设置输入框禁用/只读：

实例

< input type = " text " class = " form-control " placeholder = " Normal input " > < input type = " text " class = " form-control " placeholder = " Disabled input " disabled > < input type = " text " class = " form-control " placeholder = " Readonly input " readonly >

尝试一下 »

纯文本输入

使用 .form-control-plaintext 类可以删除输入框的边框：：

实例

< input type = " text " class = " form-control-plaintext " placeholder = " Plaintext input " > < input type = " text " class = " form-control " placeholder = " Normal input " >

尝试一下 »

取色器

使用 .form-control-color 类可以创建一个取色器：

实例

< input type = " color " class = " form-control form-control-color " value = " #CCCCCC " >

尝试一下 »

显示效果：