CSS直接后代（>）在选择性上没有任何价值吗？ [英] Does the CSS direct decendant (>) not have any value in selectivity?

问题描述

给定以下类声明和代码...

Given the following class declarations and code...

.foo > a { color:green; }
.bar a { color:red; }

<div class="bar">
    <div class="foo">
        <a href="#">SOME LINK</a>
    </div>
</div>

...我认为链接将是绿色的，因为虽然两个声明有一个类（010）和一个元素（001）， .foo 有直接后代选择器。但唉，链接是红色的。 为什么？

... I thought that the link would be green because, while both declarations have a class (010) and an element (001), .foo has the direct descendant selector. But alas, the link is red. Why?

推荐答案

> for css specificity。

There's no value for > for css specificity.

两种情况都有11个特异性值：

Both case have 11 value for specificity:

.foo > a { color:green; }/*specificity value is 11*/
.bar a { color:red; }/*specificity value is 11*/

---

你的情况下，你可以这样使用更具体：

---

In your case you may use like this to have greater specificty:

.bar .foo > a { color:green; }/*greater specificity value is 21*/
.foo a { color:red; }/*specificity value is 11*/

---

，我将在这里添加如何具体的工作原理：

---

Ok, I'm going add here how specificity works:

Selector                          Specificity         Specificity in large base
inline-style                      1 0 0 0             1000
id selector                       0 1 0 0              100
class,pseudo,attribute selector   0 0 1 0               10
type selector and pseudo elements 0 0 0 1                1                     

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