Aug
20Selective Enhancement: Border Radius

In the world of web design, there's a concept known as "Progressive Enhancement" The basic definition on Wikipedia is as follows:

Progressive enhancement is a strategy for web design that emphasizes accessibility, semantic markup, and external stylesheet and scripting technologies. Progressive enhancement uses web technologies in a layered fashion that allows everyone to access the basic content and functionality of a web page, using any browser or Internet connection, while also providing those with better bandwidth or more advanced browser software an enhanced version of the page.

Today we updated the homepage at the Georgetown Law Library to include rounded corners for browsers that understand them. This doesn't add functionality, and it is no more advanced than it was. Given this, it seems more like "selective enhancement". We've selectively enhanced things for people using Safari or Firefox, while leaving Internet Explorer users with angled corners.

Compare the difference:
On a browser that interprets rounded corners:

On a browser that ignores this property:


For our own documentation, the corners are done with the CSS Property -moz-border-radius.

There are dozens of alternative methods of creating rounded corners, some requiring images, some with JavaScript, and some in pure CSS. For us, we decided that it's enough to selectively enhance the experience of visitors. Maybe it's a way for us to show that Firefox users tend to think outside the box (pun intended).