Yes. That is noted in the PR: > There is a TC39 proposal for type annotations Which links to https://github.com/tc39/proposal-type-annotations https://github.

Yes. That is noted in the PR: > There is a TC39 proposal for type annotations Which links to https://github.com/tc39/proposal-type-annotations https://github.com/tc39/proposal-type-annotations It is a long ways off though.