"import Redis" is flagged as invalid constructor function type in ESM TypeScript project

I had to do this to get started

import Redis from 'ioredis'

import type { Species } from '#lib/pokemon/Species.js'

export enum RedisKey {
  GetPokemon = `getPokemon`
}

export type RedisQuery<K extends RedisKey> = K extends `getPokemon` ? Species : null

export class RedisClient extends Redis {
  public async insert<K extends RedisKey>(
    key: K,
    query: RedisQuery<K>,
    data: unknown
  ): Promise<`OK`> {
    return super.set(`${key}:${query}`, JSON.stringify(data))
  }
}

Same issue as:

import { default as Redis } from 'ioredis'

They prints: Type 'typeof import("node_modules/.pnpm/ioredis@5.2.3/node_modules/ioredis/built/index")' is not a constructor function type.

My project settings are:

package	version
Module Type	ESM
Node.js	16.13.2
pnpm	7.9.5
ioredis	5.2.3
TypeScript	4.8.2
@types/ioredis	not installed

TSConfig:

{
  "extends": "@sapphire/ts-config/extra-strict",
  "compilerOptions": {
    "lib": ["ESNext"],
    "target": "ESNext",
    "module": "ESNext",
    "moduleResolution": "Node16",
    "emitDecoratorMetadata": false
  }
}

[GingerAdonis]

import { default as Redis } from "ioredis" is the solution documented on README.md but I agree the syntax may seem odd.

The problem is that despite using that import statement one still has to use Redis.default as a constructor to make it properly work with Typescript.

Example:

import { default as Redis } from 'ioredis';
const redis = new Redis.default();

The named Redis export is only exported as a type. Which is kind of strange as well.

[Sayakie]

Resolved as do:

import { default as Redis } from 'ioredis'

export class RedisClient extends Redis.default {
  // ... whatever
}