define type recursive conditionalTypeScript 4.5 performs some tail-recursion elimination on conditional types깊어도 에러 안나고 optimize 함 by avoiding intermediate instantiations Announcing TypeScript 4.5 BetaToday we are excited to announce the beta release of TypeScript 4.5! To get started using the beta, you can get it through NuGet, or use npm with the following command: npm install typescript@beta You can also get editor support by Downloading for Visual Studio 2019/2017 Following directions for Visual Studio Code and Sublime Text 3.https://devblogs.microsoft.com/typescript/announcing-typescript-4-5-beta/#tailrec-conditional
