源代码 -->
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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.net/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.staticfile.net/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script> </head> <body> <nav class="navbar navbar-expand-sm bg-dark navbar-dark"> <form class="d-flex"> <div class="input-group mb-3"> <span class="input-group-text" id="basic-addon1">@</span> <input type="text" class="form-control me-2" placeholder="Username" aria-label="Username" aria-describedby="basic-addon1"> </div> </form> </nav> </body> </html>
运行结果
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