你好，我在这样的输入上使用了 has-error 类:
<!DOCTYPE html>
<html lang="en">
<head>
<title></title>
<meta charset="utf-8">
<meta input1="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<form method="post">
<div class="col-lg-4 col-lg-offset-4 has-error">
<input type="text" name="input" class="form-control"/>
</div>
</form>
</body>
</html>
但我想增加红色边框的厚度，所以我尝试添加:
<style>
.has-error{
line-height:3px;
}
</style>
但是没有效果，请问是否可以改变这个类的粗细，如何实现呢？
谢谢
最佳答案
line-height 不是您要更改的属性，请尝试 border-width。您还需要将类指定为 .form-control，否则您的样式将不会应用。
.has-error .form-control{
border-width: 3px;
border-color: blue !important;
}<!DOCTYPE html>
<html lang="en">
<head>
<title></title>
<meta charset="utf-8">
<meta input1="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<form method="post">
<div class="col-lg-4 col-lg-offset-4 has-error">
<input type="text" name="input" class="form-control"/>
</div>
</form>
</body>
</html>希望对您有所帮助。
关于css - Bootstrap : is it possible to change the "has-error" line thickness?，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44328736/