Bootstrap 4 .border-primary 类
bootstrapweb developmentcss framework更新于 2024/2/5 17:48:17
使用 border-primary 类在 Bootstrap 4 中为元素添加蓝色边框，如下所示:
将类设置为 −
<div class="demo border border-primary"> 蓝色边框 </div>
您可以尝试运行以下代码来实现 border-primary 类 −
示例
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<style>
.demo {
width: 250px;
height: 170px;
margin: 10px;
}
</style>
</head>
<body>
<div class="container">
<h3>Demo Heading</h3>
<div class="demo border border-primary">Blue Border</div>
</div>
</body>
</html>
