TypeScript `|` Combinator

I have the following code:

ceramic.did = new DID({
  provider: threeID.getDidProvider(),
  resolver: {
    ...get3IDResolver(ceramic), // returns a ResolverRegistry
    ...getKeyResolver(),        // returns a ResolverRegistry
  } as ResolverRegistry,
});

ceramic.did = new DID({
  provider: threeID.getDidProvider(),
  resolver: {
    ...get3IDResolver(ceramic), // returns a ResolverRegistry
    ...getKeyResolver(),        // returns a ResolverRegistry
  } as ResolverRegistry,
});

And, TypeScript is giving me the following error:

Type 'ResolverRegistry' is not assignable to type 'Resolver | ResolverRegistry | undefined'.
  Type 'ResolverRegistry' is missing the following properties from type 'Resolver': registry, cache, resolvets(2322)
(property) resolver?: Resolver | ResolverRegistry | undefined

Type 'ResolverRegistry' is not assignable to type 'Resolver | ResolverRegistry | undefined'.
  Type 'ResolverRegistry' is missing the following properties from type 'Resolver': registry, cache, resolvets(2322)
(property) resolver?: Resolver | ResolverRegistry | undefined

I thought that let pet: Cat | Dog means I can assign either a Cat or Dog to it. Is that not right?

1 Reply

dys 🐙•16mo ago

Nevermind. I think it might be complaining about the Resolver type within ResolverRegistry. There were two different versions of the library included. I set a "resolutions" for the more recent version in my package.json & TS is now happy.

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TypeScript `|` Combinator