编程学习网为您整理以下代码实例，主要实现：Bootstrap帮助文本，希望可以帮到各位朋友。
<!DOCTYPE HTML>
<HTML>
<head>
<Title>Try v1.2 bootstrap Online</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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