How to fix "Type instantiation is excessively deep and possibly infinite" Error

[p3yman]

I'm exploring this amazing tool but I'm stuck in a weird error.
The project is a simple Vite + React to test using Spotify API.

What I did:

1- Created a openapi.ts file that includes export const openapi = {} as const;

2- Created the client.ts file:

import { createClient, NormalizeOAS } from "fets";
import type { openapi } from "./openapi";

export const client = createClient<NormalizeOAS<typeof openapi>>({
  endpoint: "https://api.spotify.com/v1",
});

3- Used the client this to the App.tsx:

import { NormalizeOAS, OASOutput } from "fets";
import type { openapi } from "./api/openapi";
import { useEffect, useState } from "react";
import { client } from "./api/client";

type Artist = OASOutput<
  NormalizeOAS<typeof openapi>,
  "/artists/{id}",
  "get",
  "200"
>;

function App() {
  const [artist, setArtist] = useState<Artist>();

  useEffect(() => {
    client["/artists/{id}"]
      .get({
        params: { id: "1KCSPY1glIKqW2TotWuXOR" },
        headers: {
          Authorization: `Bearer ${import.meta.env.VITE_APP_SPOTIFY_TOKEN}}`,
        },
      })
      .then((res) => {
        if (res.ok) {
          return res.json();
        }

        throw new Error("Something went wrong");
      })
      .then((artist) => {
        setArtist(artist);
      })
      .catch((err) => {
        console.log(err);
      });
  }, []);

  if (!artist) {
    return <>Loading...</>;
  }

  return <>{artist.name}</>;
}

export default App;

It works without any problem, but I have the TS error on VSCode:

// Type instantiation is excessively deep and possibly infinite.ts(2589)

Is there any solution to this?

[ardatan]

Could you reproduce it on CodeSandbox?

[p3yman]

No, but the TypeScript doesn't seem to work normally on CodeSandbox for me:

https://codesandbox.io/p/sandbox/red-field-fs4zdm?file=%2Fsrc%2FApp.tsx%3A16%2C20

Either way, I also put it in a repo, if you want to have a closer look. Really appreciate it.
https://github.com/p3yman/fets-demo

[ardatan]

Could you try with the latest version?

[p3yman]

Upgraded all packages & restarted the TS server, but the same error is there.

[p3yman]

I pushed an update. It's fixed by extracting the fetch. Thanks for following this up