Provide shim file

[micalevisk]

Is your feature request related to a problem? Please describe.

I want to share with my frontend (a TS app that runs in a browser) all my DTO classes developed to my backend, but since they are annotated with the decorator factory @AutoMap() from @automapper/classes I can't do this unless I bundle @automapper/classes with my frontend app, and I'm trying to avoid this since I don't need this package there.

Describe the solution you'd like

Developers can use classes annotated with decorators from @automapper/* in TypeScript apps that are run in the browser. This is done by telling either the TS compiler or a bundler used in the browser app to use the newly added shim file instead of the actual package.

The shim file is a lot smaller in size and does not introduce any dependencies on node packages that would otherwise require even larger polyfills.

An example of this kind of file: https://github.com/nestjs/graphql/pull/1184/files for @nestjs/graphql package. Another one: https://github.com/nestjs/swagger/pull/1505/files (with a test suite!)

The shim file can live under @automapper/classes/extra directory, and it will only exports AutoMap function I guess.

Describe alternatives you've considered

Create the shim file locally

export function AutoMap(): PropertyDecorator {
  return () => {};
}

Additional context

No response

[nartc]

That'd be nice. Would you like to make a PR? Hacktoberfest is around the corner :D

[micalevisk]

Hacktoberfest is around the corner

oh I'll wait then haha