How to merge SWR Config onError and trigger onError

[PedroLucasSilva]

I noticed that when I use the trigger's onError (useSWR Mutation) it replaces the onError configured in SWRConfig. Is it possible to combine the two instead? I want to use the one configured in SWRConfig for generic errors (500) and the ones configured in the trigger to handle specific errors.

[koba04]

@PedroLucasSilva
The onError of the hook is merged with SWRConfig, so the onError in SWRConfig is never called if you set onError on the hook.
But you can get the config from useSWRConfig(), so you can get the onError in SWRConfig and call it in the onError on the hook to call the both onError.

const { onError } = useSWRConfig();
const { trigger } = useSWRMutation('/api/user', updateUser, {
  onError(...args) {
    onError(...args);
    // put your custom error handling
  }
));