html - CSS - 2个DIV之间的边距冲突

Question

我有两个 DIV，我想我有边距冲突...

<div style="margin-bottom: 10px;">Example box</div>
<div style="margin-top: 10px;">Example box</div>

它们之间有 10px，我想要 20px..有什么建议吗？

Answer 1

正如其他人已经说过的，这被称为 collapsing margins :

8 Box model - 8.3.1 Collapsing margins

In CSS, the adjoining margins of two or more boxes (which might or might not be siblings) can combine to form a single margin. Margins that combine this way are said to collapse, and the resulting combined margin is called a collapsed margin.

在这种情况下，它们是兄弟元素；因此以下内容适用:

Margins between a floated box and any other box do not collapse (not even between a float and its in-flow children).

float 其中一个兄弟元素将防止边距折叠:

EXAMPLE HERE

<div style="margin-bottom: 10px;">These are NOT</div>
<div style="margin-top: 10px; float:left;">collapsing</div>

Margins of inline-block boxes do not collapse (not even with their in-flow children).

制作一个元素 inline-block 也可以防止边距折叠:

EXAMPLE HERE

<div style="margin-bottom: 10px;">These are NOT</div>
<div style="margin-top: 10px; display:inline-block;">collapsing</div>

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假设元素不是兄弟元素，您可以将 overflow:hidden 添加到父元素，因为以下内容将适用:

Margins of elements that establish new block formatting contexts (such as floats and elements with 'overflow' other than 'visible') do not collapse with their in-flow children.