Bootstrap 4 .d-block类
在Bootstrap中使用.d-block类创建块元素。
d-block类的设置如下面的代码片段所示-
<span class="d-block bg-primary"> 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>Creating Blocks</h2>
<p>Resize the browser to check the effect.</p>
<span class="d-block bg-primary">
block
</span>
<span class="d-sm-block bg-primary">
block on small screen
</span>
</div>
</body>
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