```suggestion

[phuc-hoang-39]

- Class decorators may exclusively come before, or after, `export`/`export default`.

the square bracket notation means "optional" in argument signatures and command line args but there's no convention for using it in code syntax, especially when brackets have a meaning already.

Originally posted by @ljharb in https://github.com/tc39/proposal-decorators/pull/498#discussion_r1122555881