CSS3选择器:类名的第一个类型?

CSS3 selector :first-of-type with class name?(CSS3选择器:类名的第一个类型?)

问题描述

是否可以使用 CSS3 选择器 :first-of-type 来选择具有给定类名的第一个元素?我的测试没有成功，所以我认为不是?

Is it possible to use the CSS3 selector :first-of-type to select the first element with a given class name? I haven't been successful with my test so I'm thinking it's not?

代码(http://jsfiddle.net/YWY4L/):

The Code (http://jsfiddle.net/YWY4L/):

p:first-of-type {color:blue}
p.myclass1:first-of-type {color:red}
.myclass2:first-of-type {color:green}

<div>
  <div>This text should appear as normal</div>
  <p>This text should be blue.</p>
  <p class="myclass1">This text should appear red.</p>
  <p class="myclass2">This text should appear green.</p>
</div>

推荐答案

不，只使用一个选择器是不可能的.:first-of-type 伪类选择其 type 的第一个元素(div、p、等等).将类选择器(或类型选择器)与该伪类一起使用意味着选择一个元素，如果它具有给定的类(或属于给定的类型)并且是其类型中的第一个兄弟姐妹.

No, it's not possible using just one selector. The :first-of-type pseudo-class selects the first element of its type (div, p, etc). Using a class selector (or a type selector) with that pseudo-class means to select an element if it has the given class (or is of the given type) and is the first of its type among its siblings.

不幸的是，CSS 没有提供只选择第一次出现的类的 :first-of-class 选择器.作为一种解决方法，您可以使用以下方法:

Unfortunately, CSS doesn't provide a :first-of-class selector that only chooses the first occurrence of a class. As a workaround, you can use something like this:

.myclass1 { color: red; }
.myclass1 ~ .myclass1 { color: /* default, or inherited from parent div */; }

这里 和 这里.

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