form-control-feedback
在Bootstrap 4中似乎不是一部分。如何使用Bootstrap 4实现以下结果(文本框内的图标)?
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<body>
<div class="container">
<form class="form-horizontal">
<div class="form-group has-warning has-feedback">
<div class="col-sm-10">
<input type="text" class="form-control">
<span class="form-control-feedback"><i class="fa fa-rotate-right"></i></span>
</div>
</div>
</form>
</div>
</body>
form-text text-muted
。这在4.3文档的“帮助文本”部分中有记录:https://getbootstrap.com/docs/4.3/components/forms/#help-text - Kevinleary.net