Is there a formal (ideally BNF) typescript js language grammar (or only typescript subset)?

Question

I\'m looking for the Typescript grammar. Not the parser-lexer, but only the formal grammar description. I want to implement ts it\'s code folding and basic static code analy

Answer 1

An ANTLR4 grammar, but admittedly "not exactly ... to TypeScript standard" (it's a pain there are so few official grammars for existing programming languages):

https://github.com/antlr/grammars-v4/tree/master/typescript