在Bootstrap 4的中心对齐收集的项目
使用.align-content-center类在Bootstrap4的中心对齐收集的项目。
设置align-content-center类，如下所示-
<div class="d-flex flex-wrap align-content-center bg-primary">
之后，添加弹性项目-
<div class="d-flex flex-wrap align-content-center bg-primary" style="height:250px"> <div class="p-2 border">One</div> <div class="p-2 border">Two</div> <div class="p-2 border">Three</div> </div>
让我们看一个实现align-content-center类的示例-
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>Example</h2>
<div class="d-flex flex-wrap align-content-center bg-primary" style="height:250px">
<div class="p-2 border">One</div>
<div class="p-2 border">Two</div>
<div class="p-2 border">Three</div>
<div class="p-2 border">Four</div>
<div class="p-2 border">Five</div>
<div class="p-2 border">Six</div>
<div class="p-2 border">Seven</div>
<div class="p-2 border">Eight</div>
<div class="p-2 border">Nine</div>
<div class="p-2 border">Ten</div>
<div class="p-2 border">Eleven</div>
<div class="p-2 border">Twelve</div>
<div class="p-2 border">Thirteen</div>
<div class="p-2 border">Fourteen</div>
</div>
</div>
</body>
</html>