error transfrom from ESM export default to CJS module.exports

[LoTwT]

issue

It will only transform export default to module.exports when

• the entry file has only export default without any named export
• with splitting: true and cjsInterop: true in the tsup.config.ts.

In other cases, it doesn't work.

reproduction

https://github.com/LoTwT/tsup-cjs-default-export-issue

• pnpm i
• pnpm build
• node test.cjs

The result is false.

• remove the export const fn in the index.ts
• pnpm build
• node test.cjs

The result is true.

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[sxzz]

Wait evanw/esbuild#3281

[segevfiner]

So, put in other words, cjsInterop is broken ATM without splitting: true.

[lvjiaxuan]

So, put in other words, cjsInterop is broken ATM without splitting: true.

I dont know why. Fow now (ts@8.0.1), the cjsInterop doesn't work anyway with splitting be neither true or false.