Bootstrap4引入了一个新的灵活和可扩展的内容容器card组件来代替旧的panel、well和thumbnail组件。它包括页眉和页脚选项、各种内容、上下文背景颜色和强大的显示选项。 在下面的部分中，您将看到如何使用card组件。
我们可以通过 Bootstrap4 的 .card 与 .card-body 类来创建一个简单的卡片，示例如下:
<!DOCTYPE html> <html> <head> <title>Bootstrap 示例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>简单的卡片</h2> <div class="card"> <div class="card-body">简单的卡片</div> </div> </div> </body> </html>测试看看
Bootstrap4 的卡片类似 Bootstrap 3 中的面板、图片缩略图、well。
.card-header类用于创建卡片的头部样式， .card-footer 类用于创建卡片的底部样式：
<!DOCTYPE html> <html> <head> <title>Bootstrap 示例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>卡片头部和底部</h2> <div class="card"> <div class="card-header">头部</div> <div class="card-body">内容</div> <div class="card-footer">底部</div> </div> </div> </body> </html>测试看看
Bootstrap 4 提供了多种卡片的背景颜色类： .bg-primary, .bg-success, .bg-info, .bg-warning, .bg-danger, .bg-secondary, .bg-dark 和 .bg-light。
<!DOCTYPE html> <html> <head> <title>Bootstrap 示例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>多种颜色卡片</h2> <div class="card"> <div class="card-body">Basic card</div> </div> <br> <div class="card bg-primary text-white"> <div class="card-body">Primary card</div> </div> <br> <div class="card bg-success text-white"> <div class="card-body">Success card</div> </div> <br> <div class="card bg-info text-white"> <div class="card-body">Info card</div> </div> <br> <div class="card bg-warning text-white"> <div class="card-body">Warning card</div> </div> <br> <div class="card bg-danger text-white"> <div class="card-body">Danger card</div> </div> <br> <div class="card bg-secondary text-white"> <div class="card-body">Secondary card</div> </div> <br> <div class="card bg-dark text-white"> <div class="card-body">Dark card</div> </div> <br> <div class="card bg-light text-dark"> <div class="card-body">Light card</div> </div> </div> </body> </html>测试看看
我们可以在头部元素上使用 .card-title 类来设置卡片的标题 。 .card-text 类用于设置卡片正文的内容。 .card-link 类用于给链接设置颜色。
<!DOCTYPE html> <html> <head> <title>Bootstrap 示例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>标题、文本和链接</h2> <div class="card"> <div class="card-body"> <h4 class="card-title">Card title</h4> <p class="card-text">Some example text. Some example text.</p> <a href="#" class="card-link">Card link</a> <a href="#" class="card-link">Another link</a> </div> </div> </div> </body> </html>测试看看
我们可以给 <img> 添加 .card-img-top（图片在文字上方） 或 .card-img-bottom（图片在文字下方 来设置图片卡片：
<!DOCTYPE html> <html> <head> <title>Bootstrap 示例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>图片卡片</h2> <p>图片在头部 (card-img-top):</p> <div class="card" style="width:400px"> <img class="card-img-top" src="https://static.xxs100.com/images/mix/img_avatar.png" alt="Card image" style="width:100%"> <div class="card-body"> <h4 class="card-title">John Doe</h4> <p class="card-text">Some example text some example text. John Doe is an architect and engineer</p> <a href="#" class="btn btn-primary">See Profile</a> </div> </div> <br> <p>图片在底部(card-img-bottom):</p> <div class="card" style="width:400px"> <div class="card-body"> <h4 class="card-title">Jane Doe</h4> <p class="card-text">Some example text some example text. Jane Doe is an architect and engineer</p> <a href="#" class="btn btn-primary">See Profile</a> </div> <img class="card-img-bottom" src="https://static.xxs100.com/images/mix/img_avatar.png" alt="Card image" style="width:100%"> </div> </div> </body> </html>测试看看
如果图片要设置为背景，可以使用 .card-img-overlay 类:
<!DOCTYPE html> <html> <head> <title>Bootstrap 示例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>文字覆盖图片</h2> <p>如果图片要设置为背景，可以使用 .card-img-overlay 类:</p> <div class="card img-fluid" style="width:500px"> <img class="card-img-top" src="https://static.xxs100.com/images/mix/img_avatar.png" alt="Card image" style="width:100%"> <div class="card-img-overlay"> <h4 class="card-title">John Doe</h4> <p class="card-text">Some example text some example text. Some example text some example text. Some example text some example text. Some example text some example text.</p> <a href="#" class="btn btn-primary">See Profile</a> </div> </div> </div> </body> </html>测试看看