I´m always looking for what others believe to be the most important css selectors. I found the article below by Jeffery Way.
“So you learned the base id, class, and descendant selectors – and then called it a day? If so, you’re missing out on an enormous level of flexibility. While many of the selectors mentioned in this article are part of the CSS3 spec, and are, consequently, only available in modern browsers, you owe it to yourself to commit these to memory.” Thank You Jeffrey Way
