Bootstrap 块级帮助文本
Bootstrap 表单控件可以拥有与输入项流动的块级帮助文本。要添加一个全宽的内容块,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>
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