CSS编写的网页打开流畅相关知识与注意点
作者 佚名技术
来源 CSS技术
浏览
发布时间 2012-03-05
| bsp;- .menu-left#newMenuIcon { } GOOD - #backButton { } GOOD - #newMenuIcon { } 3.3、Don''t qualify class-categorized rules with tag names Similar to the rule above, all of our classes will be unique. The convention you should use is to include the tag name in the class name. BAD - treecell.indented { } GOOD - .treecell-indented { } 3.4、Try to put rules into the most specific category you can! The single biggest cause of slowdown in our system is that we have too many rules in the tag category. By adding classes to our elements, we can further subdivide these rules into class categories, and then we no longer waste time trying to match as many rules for a given tag. BAD - treeitem[mailfolder="true"] > treerow > treecell { } GOOD - .treecell-mailfolder { } 3.5、Avoid the descendant selector! The descendant selector is the most expensive selector in CSS. It is dreadfully expensive, especially if a rule using the selector is in the tag or universal category. Frequently what is really desired is the child selector. The use of the descendant&n |
凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务，公司网站：http://www.lingzhong.cn 为了给广大客户了解更多的技术信息，本技术文章收集来源于网络,凌众科技尊重文章作者的版权，如果有涉及你的版权有必要删除你的文章，请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息，谢谢! |
你可能对下面的文章感兴趣
关于CSS编写的网页打开流畅相关知识与注意点的所有评论
