每隔三个元素设置样式?

问题描述

如何使用纯 CSS 设置每三个元素的样式.

How can I style every third element with plain CSS.

我见过这样的问题，但它们涉及到 javascript.我想要一个简单的 CSS 解决方案.我知道我可以将 even 或 odd 与 :nth-child 一起使用，但 :nth-child(third) 不能:nth-child(3)

I have seen questions like this, but they involve javascript. I want a plain CSS solution. I know I can use even or odd with :nth-child but :nth-child(third) doesn't work neither does :nth-child(3)

例子:

<section>
  <div class="someclass"></div>             STYLE
  <div id="someId"></div>                   DON'T STYLE
  <div class="someotherclass"></div>        DON'T STYLE
  <div id="someotherId"></div>              STYLE
  <div class="someclass"></div>             DON'T STYLE
  <div id="someId"></div>                   DON'T STYLE
  <div class="someotherclass"></div>        STYLE
</section>

这可以通过 CSS 实现吗?没有 javascript 或 jQuery?

Is this possible with CSS - no javascript or jQuery?

推荐答案

纯 CSS 可以做到这一点.无需 javascript.

This is possible with pure CSS. No javascript needed.

使用 nth-child 选择器.¹

section > div:nth-child(3n+1) {
    background:red;
}

其中1"是样式的开始位置，3 表示应该每隔三个元素设置样式.这里解释得更好.

Where '1' is where the style starts, and 3 indicates that it should style every third element. It is explained much better here.

jsFiddle 演示在这里.

¹_{注意 - 正如其他人所提到的，这是 不完全支持 IE8 及以下版本.}

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