The type for Fuse.search defaults to unknown

[qnighy]

Describe the bug

2e60bee changed the signature of Fuse.prototype.search.

  search<T>(
    pattern: string | Fuse.Expression,
    options?: Fuse.FuseSearchOptions
  ): Fuse.FuseResult<T>[]

Here T isn't constrained by any of the arguments. Therefore it defaults to unknown, making it meaningless.

I guess search<T>(...) was meant to be search(...), using T from the outer Fuse<T>?

Version

Fuse 6.4.5

Is this a regression?

Yes. Previously the type parameter was named R and was defaulted to T from the outer class Fuse<T>.

🔬Minimal Reproduction

declare const fuse: Fuse<{ id: number }>;
const matchedIds = fuse.search("").map(res => res.item.id);

Additional context

[nwaughachukwuma]

@qnighy @krisk, to resolve the issue where the type is lost and defaults to unknown, I had to the following - using the minimal reproduction above:

type K = { id: number }
declare const fuse: Fuse<K>;
const matchedIds = fuse.search<K>("").map(res => res.item.id); // <-- notice the type parameter in `search<K>`

This was not the case before and the fix pointed by @qnighy should solve this.

I guess search(...) was meant to be search(...), using T from the outer Fuse?

[krisk]

Good catch. Will fix.

[qnighy]

Thanks!