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关于CSS封装的一个想法
目前的格式是这样的
<div class="fourPic">
<img class="fir" />
<img class="sec" />
<img class="thi" />
<img class="fou" />
</div>个人觉得使用上需要遵守的约定太多。我一向是认为约定越少越好，也省去了查文档的麻烦。
所以我打算参考 http://stackoverflow.com/questions/8720931/can-css-detect-the-number-of-children-an-element-has ，想把CSS封装成这样的格式：
<div class="album">
<img />
<img />
<img />
<img />
</div>图片数量不同的样式交给框架的CSS去自动实现，不是人为的规定哪个是fir，哪个是sec。
四张图片的样式可以这样实现：
.album > img:first-child:nth-last-child(4) {
/* fir */
}
.album > img:first-child:nth-last-child(4) ~ img:nth-of-type(2) {
/* sec */
}
.album > img:first-child:nth-last-child(4) ~ img:nth-of-type(3) {
/* thi */
}
.album > img:first-child:nth-last-child(4) ~ img:nth-of-type(4) {
/* fou */
}这样对于div来说只需要设置上"album"作为className即可实现任务要求的布局。
album demo
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