Post #124 6.19K Sep 20, 2022, 17:14 UTC #when_typescript_rehabilitatedhttps://github.com/microsoft/TypeScript/pull/50666 GitHub Improve checking of `in` operator by ahejlsberg · Pull Request #50666 · microsoft/TypeScript This PR improves checking of the in operator: In the expression key in obj, we now require the type of key to be assignable to string | number | symbol. Previously we allowed key to be of an uncon... 🔥 6 ⚡ 3 👎 1