Lars Wächter has a great article on how to implement module aliases on Typescript, thus improving your code from looking something like this:
import { User } from '../../user/model';
import { Article } from '../../article/model';
import { Cache } from '../../../../cache';
import { MongoDB } from '../../../../mongodb';Into something that can look like this:
import { User } from '@modules/user/model';
import { Article } from '@modules/article/model';
import { Cache } from '@services/cache';
import { MongoDB } from '@services/mongodb';
Photo by Emile Perron
Fantastic!
However, I encountered an issue when using the zeit/pkg packaging tool, which bundles your node js application into a single executable file.
The problem was that pkg didn’t support module aliases, the way Lars solved it above. Doing a little bit of research, I found ef-tspm which is a post typescript compilation build step which reverts those module aliases (e.g. @/your-dir/your-file ) back into its pre alias form (e.g. ../../../../your-dir/your-file). This form can be handled by the pkg tool.
What will my build process look like?
tsc– Compile your Typescript code into Javascript.ef-tspm– Revert the module aliases found in your Javascript code.pkg .– Package your node js application.
Cheers!
References
- https://dev.to/larswaechter/path-aliases-with-typescript-in-nodejs-4353
- https://github.com/vercel/pkg/issues/249#issuecomment-643117032
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