RTFM is a weird boundary. I've 'wasted' so many hours dabbling in tutorials made by other people instead of diving in real information: specs, source. It's a mental click, maybe it seems overwhelming, maybe it seems too broad and we're too impatient to read a chapter to get an answer. After a while 1) you get more patient 2) you know other sources won't help ... all of a suddent specs looks like fun reads.

ps: I was just on www.ecmascript.org/es4/spec/, historical artefact but full of surprises.