[POC] Typescript 5.2 metadata and decorators Cons It's not support by tsx (because esbuild doesn't support it) It's not support by ts-node It's not support by ts-node + swc (because swc doesn't support it) type: "module" is required in package.json types are not well implemented in typescript Symbol.metadata is read-only but we need to write it, so we need to use a workaround Pros It's a standard proposal We don't need to use a library to implement it We don't need to add experimentalDecorators and emitDecoratorMetadata in tsconfig.json