Linking an npm package to a custom TypeScript definitions file in a local directory

Currently, I am utilizing an npm package called "foo" for my project development. However, I want to link this package with a local TypeScript definitions file that is committed along with the project files. My intention is not to release this definitions file as an npm package since it's incomplete and only covers the parts of the library that I actually use.

I have attempted to solve this issue by:

Including the following in tsconfig.json

"typeRoots": [
  "./node_modules/@types",
  "./src/types"
],

I have also placed the definition file in ./src/types/foo/index.d.ts. Unfortunately, neither VSCode nor the TypeScript webpack-loader are recognizing the imports from 'foo' with the exports specified in the definition file.

What would be the correct approach to address this situation?

typescripttypescript2.0

Answer №1

After working diligently, I managed to create "my Type" for an existing library by following the guidelines set by @types. This involved publishing it on my personal Github repository instead of the standard @types.

Ultimately,

npm i git+https://github.com/my/repo.git

The type definitions will be stored in node_modules/@types/chosen-name, aligning perfectly with tsc's expectations. While I haven't tested it myself, there's no evident reason why it wouldn't function properly from alternative sources.

npm i ../myrepo

Answer №2

To resolve the issue, simply include a reference to the type definition in the "files" section of your tsconfig.json file:

{
    "compilerOptions": { ... },
    "files": ["./src/types/foo.d.ts"]
}

Another alternative solution suggested by Dan can also work, but it may require more efforts - especially if you plan on eventually publishing the definitions.

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