Bootstrap 块级帮助文本
bootstrapweb developmentcss framework更新于 2026/2/7 14:04:17
Bootstrap 表单控件可以包含与输入框一起流动的块级帮助文本。要添加全宽内容块，请在 <input> 后使用 .help-block。
以下示例演示了这一点
示例
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet"> <script src = "/scripts/jquery.min.js"></script> <script src = "/bootstrap/js/bootstrap.min.js"></script> </head> <body> <form role = "form"> <span>Example of Help Text</span> <input class = "form-control" type = "text" placeholder = ""> <span class = "help-block"> A longer block of help text that breaks onto a new line and may extend beyond one line. </span> </form> </body> </html>
