I'm not saying hyperscript isn't serious (I have no opinion on it at all actually). I'm saying the claim "avoid DSLs" followed by an example using a DSL is a sign of unseriousness on the part of the author of
HTML First.
Six principles and one of them is presented with an example that blatantly violates that same principle. I could see a mistake like this slipping through if there were many more principles and examples, but this is a relatively short piece for such an error to slip in.
