Bootstrap 4中的d-*-block类
使用Bootstrap中的d-*block类在特定的屏幕宽度上创建块。
您可以将其设置为小，中，大和超大屏幕尺寸-
<span class="d-sm-block bg-primary"> d-sm-block </span> <span class="d-md-block bg-success"> d-md-block </span> <span class="d-lg-block bg-info"> d-lg-block </span> <span class="d-xl-block bg-warning"> d-xl-block </span>
您可以尝试运行以下代码来实现d-*-block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://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>Blocks</h2>
<p>Resize the browser to check the effect</p>
<span class="d-block bg-info">block</span>
<span class="d-sm-block bg-primary">Small Screen Size</span>
<span class="d-md-block bg-success">Medium Screen Size</span>
<span class="d-lg-block bg-info">Large Screen Size</span>
<span class="d-xl-block bg-warning">Extra Large Screen Size</span>
</div>
</body>
</html>