TypeError: winston_loki_1.default is not a constructor

[vothanhbinhlt]

Hello there, I am using this module with Nestjs. I have a problem

npm run start:dev                                                                                                                                       4s  14.20.1  17:15:07

> [email protected] start:dev /Users/binhvo/Workspaces/devpanel/uiv4backend-v2
> nest start --watch
[5:15:38 PM] Starting compilation in watch mode...

[5:15:57 PM] Found 0 errors. Watching for file changes.


/Users/binhvo/Workspaces/devpanel/uiv4backend-v2/src/app.module.ts:58
        new LokiTransport({
        ^
TypeError: winston_loki_1.default is not a constructor
    at Object.<anonymous> (/Users/binhvo/Workspaces/devpanel/uiv4backend-v2/src/app.module.ts:58:9)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:12)
    at Module.require (internal/modules/cjs/loader.js:974:19)
    at require (internal/modules/cjs/helpers.js:101:18)
    at Object.<anonymous> (/Users/binhvo/Workspaces/devpanel/uiv4backend-v2/src/main.ts:4:1)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)

[VipinGoyal]

Are you importing it via import instead of require, probably thats the reason for this error.
In order to avoid this, this worked for me i.e.

Add following in tsconfig.json and
"esModuleInterop": true

and this should work now.
import LokiTransport from 'winston-loki';

[JaniAnttonen]

@VipinGoyal's answer is probably the way to go. Leaving the issue open for clarity's sake.