【CSS】Intermediate2:Grouping and Nesting2022-03-09 18:04:281.Grouping 2.Nesting If the CSS is structured well, there shouldn’t be a need to use many class or ID selectors. 【CSS】Intermediate2:Grouping and Nesting,布布扣,bubuko.com 【CSS】Intermediate2:Grouping and Nesting上一篇：函数改变全局变量-JS下一篇：ADO.NET- 基础总结及实例介绍