html - 每八个 (8) 第 n 个 child

Question

我需要像这样使用第 nth-child 每八个元素重复一个模式。

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我一直在试图找出一个公式，但我似乎没有弄对。

section {
  width: 220px;
}
div {
  width: 50px;
  height: 50px;
  float: left;
  margin-right: 5px;
  margin-bottom: 5px;
  background-color: yellow;
}

div:nth-child(4n), div:nth-child(4n+1) {
  background-color: green;
}

<section>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
</section>

Answer 1

如果您必须保留 <br>元素，那么你不想使用 nth-child作为 <br>会算作 child 。相反，您可以使用 nth-of-type :

div:nth-of-type(5n+1),div:nth-of-type(5n+3) {
  background-color: green;
}

例子:

div {
  width: 50px;
  height: 50px;
  display: inline-block;
  background-color: yellow;
}

div:nth-of-type(5n+1),div:nth-of-type(5n+3) {
  background-color: green;
}

<section>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <br>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
</section>

根据您问题中的更新信息，看起来更好的解决方案是 div:nth-of-type(8n+1), div:nth-of-type(8n+3),div:nth-of-type(8n+6), div:nth-of-type(8n+8) { background-color: green; }

body {
  font-size: 10pt;
}

section {
  width: 220px;
}

div {
  width: 50px;
  height: 50px;
  float: left;
  margin-right: 5px;
  margin-bottom: 5px;
  background-color: yellow;
}

div:nth-of-type(8n+1),
div:nth-of-type(8n+3),
div:nth-of-type(8n+6),
div:nth-of-type(8n+8) {
  background-color: green;
}

<section>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div>Should repeat here</div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div>Should repeat here</div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
</section>