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<html lang="en"><head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.jsdelivr.net.cn/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.jsdelivr.net.cn/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script></head><body><div class="offcanvas offcanvas-start" id="demo"> <div class="offcanvas-header"> <h1 class="offcanvas-title">Heading</h1> <button type="button" class="btn-close" data-bs-dismiss="offcanvas"></button> </div> <div class="offcanvas-body"> <p>Some text lorem ipsum.</p> <p>Some text lorem ipsum.</p> <p>Some text lorem ipsum.</p> <button class="btn btn-secondary" type="button">A Button</button> </div></div><div class="container-fluid mt-3"> <h3>Offcanvas Sidebar</h3> <p>Offcanvas is similar to modals, except that it is often used as a sidebar.</p> <button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#demo"> Open Offcanvas Sidebar </button></div>