... should help you understand how and when you can use CSS3 and why it has such varied implementation across different browsers.A Brief History of CSS3 The version of CSS in current use is CSS2.1, ... 1What CSS3 Is and How It Came to BeFirst, I want to discuss what CSS3 is—and isn’t—and the form it takes. The W3C s approach to CSS3 is quite different from its approach to CSS2, so this overview ... this code example, the selector is represented with E. Of course, in HTML, this selector doesn’t exist; I’m merely using it as an indicator that any selector can be used here. In the case of...