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https://www.totaltypescript.com/erasable-syntax-only https://www.totaltypescript.com/erasable-syntax-only https://tc39.es/proposal-type-annotations/ https://tc

• iainmerrick 2y ago
  Hmm, I don’t think either of those warrants any concern about “TS features making their way into JS” or “overlapping syntax”. The first one is removing a TS feature that failed to make its way into JS, and the second is about explicitly carving out a space in the syntax so that you can use TS (or Flow!) in JS codebases without being locked into any particular tooling.