@jpluimers @isotopp In the most common configuration, were TypeScript is transpiled and then executed as JS, type safety is only as good as the type definitions used. The typedefs of libraries can be lacking or outdated and you'll only find out when your application throws errors at runtime. @jpluimers @isotopp This won't happen with libraries that are written natively in TS, so the prevalence of bad typedefs is declining afaik.