引导验证状态
Bootstrap包括错误，警告和成功消息的验证样式。若要使用，只需将适当的类（.has-warning，.has-error或.has-success）添加到父元素。
示例
您可以尝试运行以下代码以实现验证状态
<!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 class = "form-horizontal" role = "form">
<div class = "form-group">
<label class = "col-sm-2 control-label">Focused</label>
<div class = "col-sm-10">
<input class = "form-control" id = "focusedInput" type = "text" value = "This is focused...">
</div>
</div>
<div class = "form-group">
<label for = "inputPassword" class = "col-sm-2 control-label">Disabled</label>
<div class = "col-sm-10">
<input class = "form-control" id = "disabledInput" type = "text" placeholder = "Disabled input here..." disabled>
</div>
</div>
<fieldset disabled>
<div class = "form-group">
<label for = "disabledTextInput" class = "col-sm-2 control-label">
Disabled input (Fieldset disabled)
</label>
<div class = "col-sm-10">
<input type = "text" id = "disabledTextInput" class = "form-control" placeholder = "Disabled input">
</div>
</div>
<div class = "form-group">
<label for = "disabledSelect" class = "col-sm-2 control-label">
Disabled select menu (Fieldset disabled)
</label>
<div class = "col-sm-10">
<select id = "disabledSelect" class = "form-control">
<option>Disabled select</option>
</select>
</div>
</div>
</fieldset>
<div class = "form-group has-success">
<label class = "col-sm-2 control-label" for = "inputSuccess">
Input with success
</label>
<div class = "col-sm-10">
<input type = "text" class = "form-control" id = "inputSuccess">
</div>
</div>
<div class = "form-group has-warning">
<label class = "col-sm-2 control-label" for = "inputWarning">
Input with warning
</label>
<div class = "col-sm-10">
<input type = "text" class = "form-control" id = "inputWarning">
</div>
</div>
<div class = "form-group has-error">
<label class = "col-sm-2 control-label" for = "inputError">
Input with error
</label>
<div class = "col-sm-10">
<input type = "text" class = "form-control" id = "inputError">
</div>
</div>
</form>
</body>
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