在Bootstrap 4的父元素中间放置一个元素

使用align-middle类将元素放置在父元素的中间。

将元素放置在中间-

<span class="align-middle">
  Middle Alignment
</span>

让我们看一个在Bootstrap 4中实现align-middle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">
      <h2>Example</h2>
      <p>This is demo text<p>
      <span class="align-baseline">Demo Baseline</span>
      <span class="align-top">Top Alignment</span>
      <span class="align-middle">Middle Alignment</span>
      <span class="align-bottom">Bottom Alignment</span>
    </div>

</body>
</html>