空div之间的差距 [英] Gap between empty divs

问题描述

我试图将这样的div网格制成 http://jsfiddle.net/hGadw/

I tried to make a grid of divs like this http://jsfiddle.net/hGadw/

<div id="outer1"><!--
    --><div class="inner top left">&nbsp;</div><!--
    --><div class="inner top right">&nbsp;</div><!--
    --><div class="inner bottom left">&nbsp;</div><!--
    --><div class="inner bottom right">&nbsp;</div><!--
--></div>
<br>
<div id="outer2"><!--
    --><div class="inner top left"></div><!--
    --><div class="inner top right"></div><!--
    --><div class="inner bottom left"></div><!--
    --><div class="inner bottom right"></div><!--
--></div>

我的样式是

* {
    box-sizing: border-box;
    margin:0;
    padding:0;
}
body {
    background-color: black;
}
#outer1, #outer2 {
    width:200px;
    height:200px;
    margin:auto;
    border-radius:50%;
}
.inner {
    height: 50%;
    width:50%;
    display: inline-block;
}
.top.left {
    background-color: green;
    border-radius: 100% 0 0 0;
}
.top.right {
    background-color: #ff3300;
    border-radius: 0 100% 0 0;
}
.bottom.left {
    background-color: darkcyan;
    border-radius: 0 0 0 100%;
}
.bottom.right {
    background-color: darkred;
    border-radius: 0 0 100% 0;
}

第一个有效，但第二个在上，下div之间有间隙.

The first one worked but the second one has a gap between the upper and lower divs.

为什么会出现差距?

推荐答案

原因是由于页边距没有缩小.

The reason is due to not collapsing margins.

在本规范中，表述边距塌陷是指两个或多个框的相邻边距(没有非空内容，填充或边框区域，或间隙将它们隔开)(可能彼此相邻或嵌套)合并以形成单个边距."

"In this specification, the expression collapsing margins means that adjoining margins (no non-empty content, padding, or border areas, or clearance separate them) of two or more boxes (which may be next to one another or nested) combine to form a single margin."

因此，在您的情况下，空的行内块元素(没有边框/内容/填充间距将它们分隔开)边距不会塌陷.

So, here in your case, empty inline-block elements (no border/content/padding clearance separate them) do not have their margins collapsed.

有关更多信息: http://www.sitepoint.com/web-foundations/collapsing-margins/

也将& nbsp; 放入其他divs

Put   in the other divs as well

检查此小提琴 http://jsfiddle.net/hGadw/3/

<div id="outer1"><!--
    --><div class="inner top left">&nbsp;</div><!--
    --><div class="inner top right">&nbsp;</div><!--
    --><div class="inner bottom left">&nbsp;</div><!--
    --><div class="inner bottom right">&nbsp;</div><!--
--></div>
<br>
<div id="outer2"><!--
    --><div class="inner top left">&nbsp;</div><!--
    --><div class="inner top right">&nbsp;</div><!--
    --><div class="inner bottom left">&nbsp;</div><!--
    --><div class="inner bottom right">&nbsp;</div><!--
--></div>

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