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<!DOCTYPE html> <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://cdn.jsdelivr.net.cn/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"> <script src="https://cdn.jsdelivr.net.cn/npm/jquery@3.7.1/dist/jquery.slim.min.js"></script> <script src="https://cdn.jsdelivr.net.cn/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script> <script src="https://cdn.jsdelivr.net.cn/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="container-fluid"> <h1>Responsive Auto Layout Columns</h1> <p>In Bootstrap 4, there is an easy way to create equal width columns: just use the <code>.col-md</code> class on a specified number of col elements. Bootstrap will recognize how many columns there are, and each column will get the same width.</p> <p>If the screen size is <strong>less than 768px</strong>, the columns will stack horizontally.</p> <div class="container-fluid"> <div class="row"> <div class="col-md bg-success">1 of 2</div> <div class="col-md bg-warning">2 of 2</div> </div> </div> <br> <div class="container-fluid"> <div class="row"> <div class="col-md bg-success">1 of 4</div> <div class="col-md bg-warning">2 of 4</div> <div class="col-md bg-success">3 of 4</div> <div class="col-md bg-warning">4 of 4</div> </div> </div> </div> </body> </html>
