摘要: W3C中伪类和伪元素的官方定义文档: In CSS 2, style is normally attached to an element based on its position in the document tree. This simple model is sufficient for 阅读全文
posted @ 2019-08-20 12:39 请叫我二狗哥 阅读(187) 评论(0) 推荐(0)