Type-only imports should be imported using import type

[backfromexile]

Hi there,

when the TypeScript configuration option isolatedModules is active, then the compilation of the generated .ts files fails as they only import types but the imports are not properly marked as such.
Type-only imports should use import type { Type } instead of import { Type }.
This change should not be an issue for any TypeScript project that uses TypeScript >=3.8.

Because of the issue mentioned above, running my Vue3 project with vite fails with a runtime error like this
Uncaught SyntaxError: The requested module '/src/_generated/Namespace.Hubs.ts' does not provide an export named 'MyType' (at Namespace.Hubs.ts:6:23).

[backfromexile]

This is an issue in Tapper as well if I'm not mistaken

[nenoNaninu]

Thanks for the issue report.

I have several projects using TypedSignalR.Client.TypeScript with isolatedModules is true, and they wrok fine. Perhaps the problem is not caused by the isolatedModules setting.

[backfromexile]

Thanks for the issue report.

I have several projects using TypedSignalR.Client.TypeScript with isolatedModules is true, and they wrok fine. Perhaps the problem is not caused by the isolatedModules setting.

Yeah you are right, I confused this with preserveValueImports in combination with importsNotUsedAsValues. Vite uses esbuild to compile TypeScript code and esbuild requires import type because of the mentioned options.

Either way, thanks for merging the PR!