ExtJs has been a pain where I work. I remember being horrified at how it takes over and starts adding styles all over, even to the body tag even if all you wer

ExtJs has been a pain where I work. I remember being horrified at how it takes over and starts adding styles all over, even to the body tag even if all you were doing was displaying a grid in a div. Why would it leak out of your div and take over the whole page like that?