Guide on the correct way to develop a Typescript NPM package accompanied by declarations?

It feels like I'm struggling with a simple task that is driving me crazy.

I have several TypeScript files with code that I want to export for an npm package. In order to enable auto-imports from npm packages, all function and constant types need to be specified in index.d.ts (if my understanding is correct).

My dilemma is this: how can I create a single .d.ts file that includes the types for all the functions and constants across multiple .ts files? Without this, I have to manually import the package; whereas with most other libraries, I can simply type the function name and an import suggestion will appear.

Answer №1

Our team has implemented TypeScript in our private npm modules that are shared among node microservices.

We found a solution that worked for us, although we may not have completely understood the reasoning behind it. By creating a separate types folder with an index.ts file and importing the necessary types into our files, we were able to ensure that the types were included in the compiled index.d.ts file.

After struggling for an entire day, we finally got everything working smoothly when the package was installed in other TypeScript projects. It was certainly a head-scratching experience!

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