If you're looking to test your HTML knowledge (and who isn't?), take a trip to the justsayhi website. How many elements can you name in five minutes?
As an aside, the JavaScript built into the test is simple but perfect -- an idea carried out well.
One of my favorite social APIs was the Open Graph API adopted by Facebook. Adding just a few META tags to each page allowed links to my article to be styled and presented the way I wanted them to, giving me a bit of control...
When you say or read "HTML5", you half expect exotic dancers and unicorns to walk into the room to the tune of "I'm Sexy and I Know It." Can you blame us though? We watched the fundamental APIs stagnate for so long that a basic feature...
I work with an awesome cast of developers at Mozilla, and one of them in Daniel Buchner. Daniel's shared with me an awesome strategy for detecting when nodes have been injected into a parent node without using the deprecated DOM Events API.
CSS animations aren't just for basic fades or sliding elements anymore -- CSS animations are capable of much more. I've showed you how you can create an exploding logo (applied with JavaScript, but all animation is CSS), an animated Photo Stack, a sweet...
I make only 25 (the shame is over me :-D). I don’t know or remenber the existence of BDO, COLGROUP, ISINDEX, KBD, OPTGROUP, Q, SAMP, TT and VAR. The others i have a simple mind blank.