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<!DOCTYPE html> <html> <head> <title>Bootstrap5 实例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="container mt-3"> <h2>外边距</h2> <p>.ms-auto 类可以设置子元素右外边距为 auto，.me-auto 类可以设置子元素左外边距为 auto:</p> <div class="d-flex mb-3 bg-secondary"> <div class="p-2 ms-auto bg-info">Flex item 1</div> <div class="p-2 bg-warning">Flex item 2</div> <div class="p-2 bg-primary">Flex item 3</div> </div> <div class="d-flex mb-3 bg-secondary"> <div class="p-2 bg-info">Flex item 1</div> <div class="p-2 bg-warning">Flex item 2</div> <div class="p-2 me-auto bg-primary">Flex item 3</div> </div> </div> </body> </html>
运行结果：