rollup-ts-reexport-bug

Prerequisites

npm i

Build

npm run build

Reproduction

When having multiple re-exports by using export { default } from './Component in a barrel file (es6 module) seems to not resolve types correctly.

E.g

// Foo/Foo.tsx
import { FC } from "react";

const Foo: FC<{
  name: string;
}> = ({ name }) => <h2>Foo {name}</h2>;

export default Foo;

// Foo/index.ts
export { default } from "./Foo";

// index.ts
export { default as Foo } from "./Foo";

results in a d.ts file like:

export { default as Foo };

but if instead of using re-export use import and then export works fine.

// Foo/index.ts
import Foo from "./Foo";
export default Foo

Expected Result

import { FC } from 'react';

interface BarProps {
    lastName: string;
}
declare const Bar: FC<BarProps>;

interface HelloWorldProps {
    name: string;
}
declare const Foo: FC<HelloWorldProps>;

export { Bar, Foo };

Actual Results

export { default as Bar, default as Foo };