要创建内联Flexbox容器，您需要在Bootstrap 4中使用d-inline-flex类-
使用d-inline-flex类-
<div class="d-inline-flex p-4 bg-primary">
然后按照下面的代码片段在其中设置flex项目-
<div class="d-inline-flex p-4 bg-primary"> <div class="p-2 bg-info">One</div> <div class="p-2 bg-danger">Two</div> <div class="p-2 bg-info">Three</div> </div>
您可以尝试运行以下代码来实现.d-inline类-
<!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>Understanding Inline Flex</h2> <div class="d-inline-flex p-4 bg-primary"> <div class="p-2 bg-info">One</div> <div class="p-2 bg-danger">Two</div> <div class="p-2 bg-info">Three</div> <div class="p-2 bg-danger">Four</div> <div class="p-2 bg-warning">Five</div> </div> </div> </body> </html>