如何将元素居中放置在 CSS Grid 的最后一行? [英] How to center elements on the last row in CSS Grid?

问题描述

我正在使用 CSS 网格来布局一些这样的项目...

#container {显示:网格；网格模板列:16.666% 16.666% 16.666% 16.666% 16.666% 16.666%；}.物品 {背景:青色；白颜色;填充:20px；边距:10px；}

<div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div>

如何让最后一行居中而不是左对齐?我不能保证项目的数量，所以想让布局看起来适合任意数量的项目.

这是我应该使用 flexbox 的东西吗?或者 CSS 网格是否适合使用?

解决方案

CSS 网格不适合整行对齐，因为纵横交错的轨道挡住了去路.详细解释如下:

• 在整个行/列中对齐网格项目(就像弹性项目一样)

作为替代方案，使用带有 justify-content: center 的 flexbox.

这会打包行水平中心的所有项目.然后你的利润将它们分开.

在完全填充的行上，justify-content 将无效，因为 没有可用空间工作.

在有可用空间的行(在您的情况下，只有最后一行)，项目居中.

#container {显示:弹性；flex-wrap: 包裹;对齐内容:居中；}.物品 {flex: 0 0 calc(16.66% - 20px);背景:青色；白颜色;填充:20px；边距:10px；}* {box-sizing: 边框框；}

<div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div><div class="item">Item</div>

I am using CSS grid to layout some items like this...

#container {
  display: grid;
  grid-template-columns: 16.666% 16.666% 16.666% 16.666% 16.666% 16.666%;
}

.item {
  background: teal;
  color: white;
  padding: 20px;
  margin: 10px;
}

<div id="container">
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
</div>

How can I get the last row to be centered instead of left aligned? I can't guarantee the number of items so want to make the layout look right for any number of items.

Is this something I should be using flexbox for instead? Or are CSS grids a suitable use?

解决方案

CSS Grid isn't suited for alignment across an entire row because of crisscrossing tracks blocking the way. Here's a detailed explanation:

• Aligning grid items across the entire row/column (like flex items can)

As an alternative, use flexbox with justify-content: center.

This packs all items in the horizontal center of the row. Then your margins push them apart.

On fully-filled rows, justify-content will have no effect since there's no free space for it to work.

On rows with free space (in your case, only the last row), the items are centered.

#container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.item {
  flex: 0 0 calc(16.66% - 20px);
  background: teal;
  color: white;
  padding: 20px;
  margin: 10px;
}

* {
  box-sizing: border-box;
}

<div id="container">
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
  <div class="item">Item</div>
</div>

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