By utilizing custom typeRoots while continuing to export these types alongside the entry point

For my project setup, I employ rollup to bundle an associated index.d.ts (and index.js) for the entrypoint src/index.ts.

Within the project structure, there exists a directory named src/types containing multiple .d.ts files. These types are globally accessible in the project due to the inclusion of src/types in the typeRoots section of the tsconfig.json file.

However, as the main entrance point to the project is index.ts, these global types are not automatically exported to users of the npm module. To make them importable outside the project, all these types need to be redeclared and re-exported within the index.ts file. Is there a way to include (///reference) these type definitions from src/types through the entrypoint index.ts while still maintaining their convenient global accessibility within the project?

Here's an example:

// src/types/foo.d.ts

interface Foo {
  bar: string;
}

// many more types...
// src/index.ts

export const HelloWorld = (input: Foo) => console.log("hello world", input.bar);

// tsconfig.json
{
...
"compilerOptions": {
   ...,
   "declaration": true,
   "typeRoots": ["src/types", "node_modules/@types"]
}
...
}

Consider this scenario where the project is being consumed:

import {HelloWorld, Foo} from "myModuleAbove";

const input: Foo = {bar: "hi"};
HelloWorld(input);

Is there a method similar to what is mentioned in this Stack Overflow post that can address this issue?

Thank you!

Answer №1

At this moment, I have decided to discontinue the use of typeRoots and .d.ts, following the guidance provided in a discussion on exporting types from declaration files to external projects.

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