css – 数学帮助我的网格：第n个孩子(一个b)

我试图使一个不依赖于预设列数的网格.我创建了一个小样本来显示情况：

<!DOCTYPE HTML>
<html>
<head>
  <Meta http-equiv="content-type" content="text/html; charset=utf-8">
  <title>Grid in HTML5 and CSS3</title>
<style>

* {margin:0;padding:0;}
.row {display:block;position:relative;clear:both;}
.row>* {display:block;position:relative;clear:both;float:left;clear:none;width:100%;}
.row>*:empty {width:0px;}

/* one column in the row */
.row>:nth-last-child(1):nth-child(1) {width:100%;} 

/* two columns in the row */
.row>:nth-last-child(2):nth-child(1) {width:50%;} 
.row>:nth-last-child(1):nth-child(2) {width:50%;} 

/* three columns in the row */
.row>:nth-last-child(3):nth-child(1) {width:33.33%;} 
.row>:nth-last-child(2):nth-child(2) {width:33.33%;}
.row>:nth-last-child(1):nth-child(3) {width:33.34%;} 
.row>:empty:nth-last-child(3):nth-child(1)+:not(:empty) {width:66.66%;} 
.row>:empty:nth-last-child(2):nth-child(2)+:not(:empty) {width:66.67%;}

article {margin:.5em;border:1px solid green;border-radius:.3em;padding:.5em; }
</style>

</head>
<body>

<section class="row">
<div>
<article>
<p>This row has only one child.</p>
</article>
</div>
</section>

<section class="row">
<div>
<article>
<p>This row has two children</p>
</article>
</div>
<div>
<article>
<p>This is the second child</p>
</article>
</div>
</section>

<section class="row">
<div>
<article>
<p>
This row has three children
</p>
</article>
</div>
<div>
<article>
<p>So this is col 2 of 3</p>
</article>
</div>
<div>
<article>
<p>And this is col 3 of 3.</p>
</article>
</div>
</section>

<section class="row">
<div></div>
<div>
<article>
<p>The first child of this row is empty so spanned with the second</p>
</article>
</div>
<div>
<article>
<p>This is the second column</p>
</article>
</div>
</section>

<section class="row">
<div>
<article>
<p>This is the first column</p>
</article>
</div>
<div></div>
<div>
<article>
<p>The second and third column are spanned</p>
</article>
</div>
</section>

</body>
</html>

我在jsfiddle上放了一个更大的样本 – 更详细地描述了这些问题

http://jsfiddle.net/jordenvanforeest/MDv32/

我现在的问题是,如果您希望这个网格可以容纳3列以上,则CSS大小将呈指数级增长.所以我正在寻找一个其他的解决方案.我试图做类似的事情

.row>:nth-last-child(an+b):nth-child(cn+d) {}

但我的微积分技能有点生锈,我无法让它正常工作.
帮助将不胜感激.

更新

thirtydot提供了一个使CSS更小的答案.这个fiddle是他提出的改进版本.

任何其他建议仍然受到欢迎.我的12个并列网格仍然需要30K的跨度.

解决方法

你可以做一些类似的显示：table combined with table-layout: fixed.

浏览器支持：http://caniuse.com/css-table(但限制因素为:not() and :empty)

参见：http://jsfiddle.net/thirtydot/MDv32/3/

你可以看到,它看起来几乎相同.有一些聪明才智,您应该可以使用我的技术复制演示中的大部分功能.我在我停下来的演示中注释出了HTML.

CSS：

.row {
    display: table;
    table-layout: fixed;
    width: 100%;
}
.row > * {
    display: table-cell;
}
.row > :empty {
    display: none;
}
/* for example: */
.row > :empty + :not(:empty) + :last-child:not(:empty) {
    width: 33.33%;
}

css – 数学帮助我的网格：第n个孩子(一个b)

解决方法

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