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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Test Bootstrap</title> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <nav class="navbar navbar-expand-lg navbar-dark bg-dark"> <div class="container-fluid"> <a class="navbar-brand" href="#">My Site</a> <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="navbarNav"> <ul class="navbar-nav"> <li class="nav-item"><a class="nav-link active" href="#">Home</a></li> <li class="nav-item"><a class="nav-link" href="#">About</a></li> <li class="nav-item"><a class="nav-link" href="#">Services</a></li> </ul> </div> </div> </nav> <div class="container mt-5"> <h1>Welcome!</h1> <p>Modify the HTML to see live changes.</p> <button class="btn btn-primary">Click Me</button> </div> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script> </body> </html>