具有不同高度列的引导行

我目前有类似的东西:

<div class="row"><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div></div>

现在假设，content 是不同高度的盒子，宽度都相同 - 我怎么能保持相同的基于网格的布局"，但让所有盒子在彼此下方排列，而不是完美的线条.

目前 TWBS 会将 col-md-4 的下一行放在前第三行中最长的元素下.因此，每一行项目都完美对齐 - 虽然这很棒我希望每个项目直接落在最后一个元素下(砌体"布局)

解决方案

这是一个流行的 Bootstrap 问题，所以我更新了并扩展了 Bootstrap 3、Bootstrap 4 和 Bootstrap 5 的答案...

引导程序 5(2021 年更新)

Bootstrap 列仍然使用 flexbox，但之前用于创建类似 Masonry 的布局的卡片列

注意:以下选项适用于

<div 类=行"><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="clearfix"></div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="clearfix"></div><div class="col-md-4">内容</div><div class="col-md-4">内容</div><div class="col-md-4">内容</div></div>

.row.display-flex {显示:弯曲；弹性包装:换行；}.row.display-flex >[类*='col-'] {显示:弯曲；弹性方向:列；}

引导砌体演示
砌体演示 2

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有关 Bootstrap 可变高度列的更多信息

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I currently have something like:

<div class="row">
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
</div>

Now assuming that, content was boxes of different height, with all the same width - how could I keep the same "grid based layout" and yet have all the boxes line up under each other, instead of in perfect lines.

Currently TWBS will place the next line of col-md-4 under the longest element in the previous third row., thus each row of items is perfectly aligned an clean - while this is awesome I want each item to fall directly under the last element ("Masonry" layout)

解决方案

This is a popular Bootstrap question, so I've updated and expanded the answer for Bootstrap 3, Bootstrap 4 and Bootstrap 5...

Bootstrap 5 (update 2021)

Bootstrap columns still use flexbox, but the card-columns previously used to create a Masonry like layout have been removed. For Bootstrap 5 the recommended method is to use the Masonry JS plugin: Bootstrap 5 Masonry Example

Bootstrap 4 (update 2018)

All columns are equal height in Bootstrap 4 because it uses flexbox by default, so the "height issue" is not a problem. Additionally, Bootstrap 4 includes this type of multi-columns solution: Bootstrap 4 Masonry cards Demo.

Bootstrap 3 (original answer -- pre flexbox)

The Bootstrap 3 "height problem" occurs because the columns use float:left. When a column is "floated" it’s taken out of the normal flow of the document. It is shifted to the left or right until it touches the edge of its containing box. So, when you have uneven column heights, the correct behavior is to stack them to the closest side.

Note: The options below are applicable for column wrapping scenarios where there are more than 12 col units in a single .row. For readers that don't understand why there would ever be more than 12 cols in a row, or think the solution is to "use separate rows" should read this first

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There are a few ways to fix this.. (updated for 2018)

1 - The 'clearfix' approach (recommended by Bootstrap) like this (requires iteration every X columns). This will force a wrap every X number of columns...

<div class="row">
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="clearfix"></div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="clearfix"></div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
    <div class="col-md-4">Content</div>
</div>

Clearfix Demo (single tier)

Clearfix Demo (responsive tiers) - eg. col-sm-6 col-md-4 col-lg-3

There is also a CSS-only variation of the 'clearfix'
CSS-only clearfix with tables

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**2 - Make the columns the same height (using flexbox):**

Since the issue is caused by the difference in height, you can make columns equal height across each row. Flexbox is the best way to do this, and is natively supported in Bootstrap 4...

.row.display-flex {
  display: flex;
  flex-wrap: wrap;
}
.row.display-flex > [class*='col-'] {
  display: flex;
  flex-direction: column;
}

Flexbox equal height Demo

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**3 - Un-float the columns an use inline-block instead..**

Again, the height problem only occurs because the columns are floated. Another option is to set the columns to display:inline-block and float:none. This also provides more flexibility for vertical-alignment. However, with this solution there must be no HTML whitespace between columns, otherwise the inline-block elements have additional space and will wrap prematurely.

Demo of inline block fix

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4 - CSS3 columns approach (Masonry/Pinterest like solution)..

This is not native to Bootstrap 3, but another approach using CSS multi-columns. One downside to this approach is the column order is top-to-bottom instead of left-to-right. Bootstrap 4 includes this type of solution: Bootstrap 4 Masonry cards Demo.

Bootstrap 3 multi-columns Demo

5 - Masonry JavaScript/jQuery approach

Finally, you may want to use a plugin such as Isotope/Masonry:

Bootstrap Masonry Demo
Masonry Demo 2

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More on Bootstrap Variable Height Columns

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