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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="container mt-3"> <h2>从开头对齐项目</h2> <p>使用 .align-items-*-start 类在不同屏幕上从开头对齐单行项目。</p> <p>请调整浏览器窗口大小来查看效果。<b>Note:</b>align-items-stretch 是默认的。</p> <p><code>.align-items-start</code>:</p> <div class="d-flex align-items-start bg-light" style="height:150px"> <div class="p-2 border">Flex item 1</div> <div class="p-2 border">Flex item 2</div> <div class="p-2 border">Flex item 3</div> </div> <br> <p><code>.align-items-sm-start</code>:</p> <div class="d-flex align-items-sm-start bg-light" style="height:150px"> <div class="p-2 border">Flex item 1</div> <div class="p-2 border">Flex item 2</div> <div class="p-2 border">Flex item 3</div> </div> <br> <p><code>.align-items-md-start</code>:</p> <div class="d-flex align-items-md-start bg-light" style="height:150px"> <div class="p-2 border">Flex item 1</div> <div class="p-2 border">Flex item 2</div> <div class="p-2 border">Flex item 3</div> </div> <br> <p><code>.align-items-lg-start</code>:</p> <div class="d-flex align-items-lg-start bg-light" style="height:150px"> <div class="p-2 border">Flex item 1</div> <div class="p-2 border">Flex item 2</div> <div class="p-2 border">Flex item 3</div> </div> <br> <p><code>.align-items-xl-start</code>:</p> <div class="d-flex align-items-xl-start bg-light" style="height:150px"> <div class="p-2 border">Flex item 1</div> <div class="p-2 border">Flex item 2</div> <div class="p-2 border">Flex item 3</div> </div> <br> <p><code>.align-items-xxl-start</code>:</p> <div class="d-flex align-items-xxl-start bg-light" style="height:150px"> <div class="p-2 border">Flex item 1</div> <div class="p-2 border">Flex item 2</div> <div class="p-2 border">Flex item 3</div> </div> </div> </body> </html>