要在末尾对齐单行项目，请在Bootstrap 4中使用.align-items-end类。
使用align-items-end类进行对齐-
<div class="d-flex flex-wrap align-items-end bg-primary" style="height:200px">
现在添加弹性项目以对齐项目的单行-
<div class="d-flex flex-wrap align-items-end bg-primary" style="height:200px"> <div class="p-2 border">Product 1</div> <div class="p-2 border">Product 2</div> <div class="p-2 border">Product 3</div> </div>
让我们看一个示例，在最后对齐单个项目行：
<!DOCTYPE html> <html> <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"> <h1>Align Flex Items on a single row at the end</h1> <div class="d-flex flex-wrap align-items-end bg-primary" style="height:200px"> <div class="p-2 border">Product 1</div> <div class="p-2 border">Product 2</div> <div class="p-2 border">Product 3</div> <div class="p-2 border">Product 4</div> </div> </div> </body> </html>