As I suspected the performance of the proposed CSS qualified selectors would put a massive load on your browser. Dave Hyatt (he’s involved in Webkit) gives a great insight into this. Be sure to read this Mozilla Guideline on how to write efficient CSS too. Stuff to think about!
About the author
Bramus is a Freelance Web Developer from Belgium. From the moment he discovered view-source at the age of 14 (way back in 1997), he fell in love with the web and has been tinkering with it ever since (more …)