为什么在css中使用空格分隔事物 [英] Why are spaces used to separate things in css

问题描述

这是我不理解的 wordpress 样式表中的一些内容:

Here is something in a wordpress stylesheet that I don't understand:

blockquote cite,
blockquote em,
blockquote i {
font-style: normal;
}

blockquote 和 cite 之间的空格有什么作用?我知道如果它们用逗号分隔，那么 blockquote 和 cite 都会有 "font-style: normal;"现在它们用空格分隔，这是否意味着如果将块引用标签嵌入到引用标签中，它将得到font-style: normal;"?

what does the space between blockquote and cite do? I understand if they are separated by a comma, then both blockquote and cite will have "font-style: normal;" now they are separated by space, does this mean if a blockquote tag is embedded into a cite tag it will get "font-style: normal;"?

谢谢.

推荐答案

空间被称为 后代组合器.blockquote cite 选择 blockquote 元素内的任何 cite 元素.blockquote em 和 blockquote i 也是如此.

The space is known as the descendant combinator. blockquote cite selects any cite element within a blockquote element. Likewise for blockquote em and blockquote i.

换句话说，这不是如果将块引用标签嵌入到引用标签中"，而是相反(此外，您不能将 blockquotes 放在 cites 放在首位).

In other words, it's not "if a blockquote tag is embedded into a cite tag", it's the other way around (besides, you can't place blockquotes in cites in the first place).

如您所见，逗号将选择器序列分组到同一规则中.

As you note, commas group selector sequences into the same rule.

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