Choosing left/right in type

[vestal atlas]

Type '(r: Response) => boolean' is not assignable to type '((x: Response) => boolean) | ((x: Response) => Promise<boolean>)'.

I think this type should unify, how can I tell typescript to choose one or the other?

[pulsar trail]

This error can't appear, it's assignable because it appears exactly in the union

[mighty sleet]

jakoxb#0

Playground Link

Preview:```ts
declare const a: (r: Response) => boolean

const b:
| ((x: Response) => boolean)
| ((x: Response) => Promise<boolean>) = a```

You can choose specific lines to embed by selecting them before copying the link.

[pulsar trail]

unless you import Response from somewhere in one place and use the global Response in another

[vestal atlas]

hm Iḿ probably doing something wrong somewhere

or my lsp is acting up

thanks a lot!