css – ::之前在Firefox中输入

参见英文答案 > CSS content generation before or after ‘input’ elements                                     5个
我正在尝试使用CSS伪类::之前在输入标记之前放置一些内容.它适用于Chrome,但不适用于Firefox. Firefox似乎有什么问题？

这是一个片段：

input::before {
	content: '';
	display: block;
	width: 13px;
	height: 13px;
	border-radius: 50%;
	box-shadow: 0px 0px 5px #9F0002 inset;
}

<input type="radio" name="gender" class="radio" value="male">male
<input type="radio" name="gender" class="radio" value="female">female

……这就是结果. Chrome工作得很好：

但Firefox没有变化：

根据 specification.

Authors specify the style and location of generated content with the :before and :after pseudo-elements. As their names indicate, the :before and :after pseudo-elements specify the location of content before and after an element’s document tree content. The ‘content’ property, in conjunction with these pseudo-elements, specifies what is inserted.

：before和：after应该只对可以充当内容容器的元素起作用. <输入>不能包含任何内容,因此它不应该支持那些伪元素. Chrome支持,因为它不符合规范(或错误？).