HTML and CSS Reference
In this chapter you explored some of the new layout features contained among
the CSS3 modules, including multi-col, flexbox, exclusions, and generated content
for paged media.
A significant number of these features are currently not supported across brows-
ers, and unfortunately, some of them don't degrade gracefully, causing layouts to
completely break in those browsers that don't support them. However, browser
vendors are working hard on adding support for them. In the meantime, you can
provide alternative styling to nonsupporting browsers through tools like Modernizr,
and you should be prepared for the revolution when it comes.