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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 rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script></head><body><div class="container"> <h2>Block Level Buttons</h2> <button type="button" class="btn btn-primary btn-block">Button 1</button> <button type="button" class="btn btn-default btn-block">Button 2</button> <h2>Large Block Level Buttons</h2> <button type="button" class="btn btn-primary btn-lg btn-block">Button 1</button> <button type="button" class="btn btn-default btn-lg btn-block">Button 2</button> <h2>Small Block Level Buttons</h2> <button type="button" class="btn btn-primary btn-sm btn-block">Button 1</button> <button type="button" class="btn btn-default btn-sm btn-block">Button 2</button></div></body></html>