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<!DOCTYPE htpl> <htpl lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Bootstrap 5 Width Classes Relative to the Viewport</title> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"></script> <style> .bs-example div{ padding: 15px; background: #dbdfe5; } .bs-example div:nth-child(2n){ background: #abb1b8; } </style> </head> <body> <div class="bs-example"> <div class="min-vw-100">Min-width 100vw</div> <div class="vw-100">Width 100vw</div> </div> </body>