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Thanks bro!

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npm i https://pkg.pr.new/tsdown@381

commit: da1cccd

@posva I reverted this PR via 7c32a1d because:

• Overloading defineConfig (similar to how Vite handles it):

export function defineConfig(options: UserConfig): UserConfig;
export function defineConfig(options: UserConfigFn): UserConfigFn;
export function defineConfig(
  options: UserConfig | UserConfigFn,
): UserConfig | UserConfigFn;

• Using generics:

  • Provides a more direct error message.
  • However, it doesn't allow jumping to the definition of properties by clicking, and no auto suggestion/completion.

• Using a union:

  • Makes it impossible to extract specific types.

After evaluating these options, I decided to go with overloading, as Vite does. If you need to achieve type inference, using satisfies is a more appropriate solution.

Of course, I didn’t expect it to break jump to definition. TIL