* * CSS选择器是什么？ [英] What does the * * CSS selector do?

问题描述

最近我在 CSS 中遇到 * * / a>。

Recently I came across * * in CSS.

网站参考 - Site Link 。

对于单个 * 在CSS样式表，互联网和Stack Overflow中的使用充满了例子，但我不确定在CSS中使用两个 * * 符号。

For a single * usage in CSS style sheet, Internet and Stack Overflow is flooded with examples, but I am not sure about using two * * symbol in CSS.

我google了，但无法找到任何相关的信息，因为单个 * 选择所有元素，但我不知道为什么网站使用了两次。

I googled it, but unable to find any relevant information about this, as a single * selects all elements, but I am not sure why the site used it twice. What is the missing part for this, and why is this hack used (if it is a hack)?

推荐答案

就像任何一个其他时候你两个选择器一个接一个（例如 li a ），你得到后代组合。因此， * * 是任何其他元素的后代的任何元素 - 换句话说，不是整个文档。

Just like any other time you put two selectors one after another (for example li a), you get the descendant combinator. So * * is any element that is a descendant of any other element — in other words, any element that isn't the root element of the whole document.

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