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<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap 实例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="offcanvas offcanvas-top" 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>一些文本。一些文本。一些文本。</p> <button class="btn btn-secondary" type="button">按钮</button> </div> </div> <div class="container-fluid mt-3"> <h3>Top Offcanvas</h3> <p>.offcanvas-top 类将 offcanvas 定位到页面顶部。</p> <button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#demo"> 切换顶部的 Offcanvas </button> </div> </body> </html>