I recommend reading specs regularly when doing anything like this. Web specs are generally pretty approachable, and they generally match implementations very cl

I recommend reading specs regularly when doing anything like this. Web specs are generally pretty approachable, and they generally match implementations very closely these days (largely because the implementers are the spec-writers, which wasn’t so much the case before, say, the HTMLL5 effort), with the caveat that parts of these drafts precede the implementations and thus may end up being altered due to implementation experience.