bs4_card(卡片)

简单的卡片
头部和底部
多种颜色的卡片
标题、文本和链接
图片卡片
文字覆盖图片

简单的卡片

<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>

.card{
    display:flex;
    flex-direction:column;
    min-0;
    word-wrap:break-word;
    background-color:white;
    background-clip:border-box;
    border:1px solid rgba(0,0,0,0.125);
    border-radius:0.25rem;
}

头部和底部

<div class="container">
        <h2>简单的卡片</h2>
        <div class="card">
            <div class="card-header">头部</div>
            <div class="card-body">简单的卡片</div>
            <div class="card-footer">底部</div>
        </div>
    </div>

.card-header{
    padding:0.75rem 1.25rem;
    margin-bottom:0;
    background-color:rgba(0,0,0,0.03);
    border-bottom:1px solid rgba(0,0,0,0.125);
}
.card-body{
    flex:1 1 auto;
    /*flex是flex-grow、flex-shrink、flex-basis的缩写*/
    padding:1.25rem;
}
.card-footer{
    padding:0.75rem 1.25rem;
    background-color:rgba(0,0,0,0.03);
    border-top:1px solid rgba(0,0,0,0.125);
}

多种颜色的卡片

在.card的容器后面添加背景

<div class="container">
        <h3>多种背景颜色的卡片</h3>
        <div class="card bg-primary text-white">
            <div class="card-header">Primary card</div>
        </div>
        <div class="card bg-success text-white">
            <div class="card-body">Success card</div>
        </div>
        <div class="card bg-info text-white">
            <div class="card-footer">Info card</div>
        </div>
    </div>

标题、文本和链接

在头部元素上使用.card-title类，在卡片文本上使用.card-text类，在卡片链接上使用.card-link

<div class="container">
        <div class="card-body">
            <h3 class="card-title">Card Title</h3>
            <p class="card-text">Lorem ipsum dolor sit amet.</p>
            <a href="#" class="card-link">Card Link</a>
            <a href="#" class="card-link">Another Card Link</a>
        </div>
    </div>

图片卡片

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：

<h3>图片卡片_图片在顶部</h3>
        <div class="card" style=" 400px;">
            <img src="https://static.runoob.com/images/mix/img_avatar.png" alt="" class="card-img-top" style=" 100%;">
            <div class="card-body">
                <h3 class="card-title">JANE</h3>
                <p class="card-text">Lorem ipsum dolor sit amet consectetur adipisicing elit. Harum repellendus maiores rerum, reiciendis soluta sequi.</p>
            </div>
        </div>

<h3>图片卡片_图片在底部</h3>
        <div class="card" style=" 400px;">
            <div class="card-body">
                <h3 class="card-title">JOHN</h3>
                <p class="card-text">Lorem ipsum dolor sit amet consectetur adipisicing elit. Quo ducimus voluptas
                    dolore quos iure inventore.</p>
                <a href="#" class="btn btn-primary">homePage</a>
            </div>
            <img src="https://static.runoob.com/images/mix/img_avatar.png" alt="" class="card-img-bottom" style=" 100%;">
        </div>

文字覆盖图片

对.card类添加.card-img-overlay类

<div class="card img-fluid" style="400px;">
    <img src="https://static.runoob.com/images/mix/img_avatar.png" class="card-img-top" style="100%;">
    <div class="card-body card-img-overlay">
        <h3 class="card-title">card-title</h3>
        <p class="card-text">card-text</p>
        <a href="#" class="btn btn-primary">BTN</a>
    </div>
</div>