在 flexbox 底部对齐三个 div答案

【问题标题】：Align three divs at the bottom of flexbox在 flexbox 底部对齐三个 div
【发布时间】：2019-08-26 00:15:03
【问题描述】：

这是基本的 css，但我就是做不好。

我正在建立一个电子商务网站，所以我需要很多弹性框来展示产品。我也在我的项目中使用引导程序。这是我的代码：

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet"/>
<div class="row" style="display: flex; flex-wrap: wrap;">
  <div class="col-sm-6 col-md-3" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://i.dell.com/das/xa.ashx/global-site-design%20web/00000000-0000-0000-0000-000000000000/1/LargePNG?id=Dell/Product_Images/Dell_Client_Products/Notebooks/Latitude_Notebooks/12_7275/global_spi/notebook-latitude-12-7275-black-left-windows-hero-504x350.psd"
      alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;" class="text-center">Laptop Dell XPS 9250 12.5" (m56Y57/8GB/256GB/ HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-67% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$2499.99</span></span> $1499.99</h5>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>

  <div class="col-sm-6 col-md-3" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://external.webstorage.gr/Product-Images/1312102/quest-slimbook-convertible-1000-1312102.jpg" alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;" class="text-center">Laptop Quest Slimbook 360 Convertible - 13.3" (Celeron N3350/4GB/32GB/HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-40% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$349</span></span> $249</h5>
    </div>
    <div class="text-center">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>
</div>

这就是它的样子：

我希望第一个弹性框中的“-67% 折扣”及其下方的所有元素与第二个弹性框中的相同元素高度匹配。如您所见，我已经在包含优惠的 div 中使用style="margin-top:auto;"（现在享受 67% 优惠和现在享受 40% 优惠），但它并没有在底部对齐。 p>

这就是我想要的样子：

更重要的是，当在移动设备中查看此代码或通过缩小浏览器窗口时，三个 div 在底部成功对齐。我错过了什么？

【问题讨论】：

标签： html css twitter-bootstrap flexbox

【解决方案1】：

有两种方法可以解决。

一般方式

使用min-height 将图像产品和标题包装在包装器中。显然，min-height 对于最高的人来说应该足够了。
具体方式

这通常更好，因为不是硬编码页面上所有产品的min-width，它只是让它们调整到行中最高的高度。您仍然需要对图片和产品标题进行包装，但您提供的不是 min-height，而是整个产品

display:flex;
flex-direction: column;

...并给出上述包装器flex-grow: 1。这将使该行中的所有产品增长到与最高的匹配，并将额外的高度分配给具有flex-grow: 1（这是您的包装器）的唯一子元素。

工作示例：

.products {
  display: flex; 
  flex-wrap: wrap;
}
.product {
  cursor:pointer; 
  transition: border .2s ease-in-out; 
  margin:15px; 
  border: 1px solid #ddd; 
  border-radius: 4px; 
  height:auto; 
  box-shadow: 0 2px 3px rgba(0,0,0,.075);
}
.product img {
  vertical-align: middle;
  width: 100%;
  height: auto;
}
.product h4 {
  overflow-wrap: break-word; 
  word-wrap: break-word;
}
.product h5 {
  margin-right:5px; 
  font-size:18px;
}
.add_to_cart {
  margin-bottom:5px;
}

/* here's the magic */

.product {
  display: flex;
  flex-direction: column;
}
.product-body {
  flex-grow: 1;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container">
  <div class="row products">
    <div class="col-sm-6 col-md-3 product">
      <div class="product-body">
        <img style="" class="img-responsive" src="https://i.dell.com/das/xa.ashx/global-site-design%20web/00000000-0000-0000-0000-000000000000/1/LargePNG?id=Dell/Product_Images/Dell_Client_Products/Notebooks/Latitude_Notebooks/12_7275/global_spi/notebook-latitude-12-7275-black-left-windows-hero-504x350.psd"
          alt="...">
        <div>
          <h4 class="text-center">Laptop Dell XPS 9250 12.5" (m56Y57/8GB/256GB/ HD)</h4>
        </div>
      </div>
      <div class="text-center" style="margin-top:auto;">
        <span style="color:yellow;background-color:red;font-size:18px;">-67% OFF NOW!</span>
      </div>
      <div>
        <h5 class="text-center">
          <span style="text-decoration: line-through; color:black; font-size:22px;">
            <span style="color:red; font-size:20px">$2499.99</span>
          </span>
          $1499.99
        </h5>
      </div>
      <div class="text-center" style="margin-top:auto;">
        <button class="btn btn-success add_to_cart">Add to cart</button>
      </div>
    </div>

    <div class="col-sm-6 col-md-3 product">
      <div class="product-body">
        <img class="img-responsive" src="https://external.webstorage.gr/Product-Images/1312102/quest-slimbook-convertible-1000-1312102.jpg" alt="...">
        <div>
          <h4 class="text-center">Laptop Quest Slimbook 360 Convertible - 13.3" (Celeron N3350/4GB/32GB/HD)</h4>
        </div>
      </div>
      <div class="text-center" style="margin-top:auto;">
        <span style="color:yellow;background-color:red;font-size:18px;">-40% OFF NOW!</span>
      </div>
      <div>
        <h5 class="text-center">
          <span style="text-decoration: line-through; color:black; font-size:22px;">
            <span style="color:red; font-size:20px">$349</span>
          </span>
          $249
        </h5>
      </div>
      <div class="text-center">
        <button class="btn btn-success add_to_cart">Add to cart</button>
      </div>
    </div>
  </div>
</div>

【讨论】：

【解决方案2】：

你也可以让每个盒子成为一个弹性容器，然后将margin:auto 移除到按钮上，如果价格必须包含在 2 行上，你可以在 h5 中添加一个最小高度。

img {max-width:100%;}/* avoids image stretching*/
h5.text-center {min-height:2.8em;}/* about 2 line height */

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container">
  <div class="row flex-wrap" style>
  <div class="col-sm-6 col-md-3 d-flex flex-column" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://i.dell.com/das/xa.ashx/global-site-design%20web/00000000-0000-0000-0000-000000000000/1/LargePNG?id=Dell/Product_Images/Dell_Client_Products/Notebooks/Latitude_Notebooks/12_7275/global_spi/notebook-latitude-12-7275-black-left-windows-hero-504x350.psd"
      alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;" class="text-center">Laptop Dell XPS 9250 12.5" (m56Y57/8GB/256GB/ HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-67% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$2499.99</span></span> $1499.99</h5>
    </div>
    <div class="text-center" style="">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>

  <div class="col-sm-6 col-md-3  d-flex flex-column" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://external.webstorage.gr/Product-Images/1312102/quest-slimbook-convertible-1000-1312102.jpg" alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;" class="text-center">Laptop Quest Slimbook 360 Convertible - 13.3" (Celeron N3350/4GB/32GB/HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-40% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$349</span></span> $249</h5>
    </div>
    <div class="text-center">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>  <div class="col-sm-6 col-md-3 d-flex flex-column" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://i.dell.com/das/xa.ashx/global-site-design%20web/00000000-0000-0000-0000-000000000000/1/LargePNG?id=Dell/Product_Images/Dell_Client_Products/Notebooks/Latitude_Notebooks/12_7275/global_spi/notebook-latitude-12-7275-black-left-windows-hero-504x350.psd"
      alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;flex:1;" class="text-center">Laptop Dell XPS 9250 12.5" (m56Y57/8GB/256GB/ HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-67% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$2499.99</span></span> $1499.99</h5>
    </div>
    <div class="text-center" style="">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>

  <div class="col-sm-6 col-md-3  d-flex flex-column" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://external.webstorage.gr/Product-Images/1312102/quest-slimbook-convertible-1000-1312102.jpg" alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;" class="text-center">Laptop Quest Slimbook 360 Convertible - 13.3" (Celeron N3350/4GB/32GB/HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-40% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$349</span></span> $249</h5>
    </div>
    <div class="text-center">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>  <div class="col-sm-6 col-md-3 d-flex flex-column" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://i.dell.com/das/xa.ashx/global-site-design%20web/00000000-0000-0000-0000-000000000000/1/LargePNG?id=Dell/Product_Images/Dell_Client_Products/Notebooks/Latitude_Notebooks/12_7275/global_spi/notebook-latitude-12-7275-black-left-windows-hero-504x350.psd"
      alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;flex:1;" class="text-center">Laptop Dell XPS 9250 12.5" (m56Y57/8GB/256GB/ HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-67% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$2499.99</span></span> $1499.99</h5>
    </div>
    <div class="text-center" style="">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>

  <div class="col-sm-6 col-md-3  d-flex flex-column" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://external.webstorage.gr/Product-Images/1312102/quest-slimbook-convertible-1000-1312102.jpg" alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;" class="text-center">Laptop Quest Slimbook 360 Convertible - 13.3 Laptop Quest Slimbook 360 Convertible - 13.3Laptop Quest Slimbook 360 Convertible - 13.3" (Celeron N3350/4GB/32GB/HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-40% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$349</span></span> $249</h5>
    </div>
    <div class="text-center">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>  <div class="col-sm-6 col-md-3 d-flex flex-column" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://i.dell.com/das/xa.ashx/global-site-design%20web/00000000-0000-0000-0000-000000000000/1/LargePNG?id=Dell/Product_Images/Dell_Client_Products/Notebooks/Latitude_Notebooks/12_7275/global_spi/notebook-latitude-12-7275-black-left-windows-hero-504x350.psd"
      alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;flex:1;" class="text-center">Laptop Dell XPS 9250 12.5" (m56Y57/8GB/256GB/ HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-67% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$2499.99</span></span> $1499.99</h5>
    </div>
    <div class="text-center" style="">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>

  <div class="col-sm-6 col-md-3  d-flex flex-column" style="cursor:pointer; transition: border .2s ease-in-out; margin:15px; border: 1px solid #ddd; border-radius: 4px; height:auto; box-shadow: 0 2px 3px rgba(0,0,0,.075);">
    <img style="vertical-align: middle;" class="img-responsive" src="https://external.webstorage.gr/Product-Images/1312102/quest-slimbook-convertible-1000-1312102.jpg" alt="...">
    <div>
      <h4 style="overflow-wrap: break-word; word-wrap: break-word;" class="text-center">Laptop Quest Slimbook 360 Convertible - 13.3 Laptop Quest Slimbook 360 Convertible - 13.3" (Celeron N3350/4GB/32GB/HD)</h4>
    </div>
    <div class="text-center" style="margin-top:auto;">
      <span style="color:yellow;background-color:red;font-size:18px;">-40% OFF NOW!</span>
    </div>
    <div>
      <h5 class="text-center" style="margin-right:5px; font-size:18px;"><span style="text-decoration: line-through; color:black; font-size:22px;"><span style="color:red; font-size:20px">$349</span></span> $249</h5>
    </div>
    <div class="text-center">
      <button class="btn btn-success add_to_cart" style="margin-bottom:5px;">Add to cart</button>
    </div>
  </div>
</div>

【讨论】：