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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/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script></head><body><div class="container mt-3"> <h2>Block Level Buttons</h2> <p>To create a block level button that spans the entire width of the parent element, use the .d-grid "helper" class on the parent element:</p> <div class="d-grid"> <button type="button" class="btn btn-primary btn-block">Full-Width Button</button> </div></div></body></html>