Author here. Property and event disambiguation syntax is definitely far on the easy to change side of things. I personally think the sigils are easier to read

Author here. Property and event disambiguation syntax is definitely far on the easy to change side of things. I personally think the sigils are easier to read and write than perfixes, and these particular sigils have popped up independently in multiple libraries like Vue, Lit, and LighterHTML. But this API could use prefixes, or like Vue, it could support both.