TypeScript - importing package failed on "Module parse failed: Unexpected token"

Current behavior

I import npm package with additional functions and I get error:

Error: Webpack Compilation Error
../node_modules/cypress-somecompany-utils/src/env.ts 1:22
Module parse failed: Unexpected token (1:22)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
> export function getEnv<TEnv, K extends keyof TEnv>(key: K): TEnv[K] {
.
.
.

I do not face this issue when I use @cypress/webpack-preprocessor. My target is to get rid of this preprocessor to increase build performance.

Desired behavior

I can import typescript packages.

Test code to reproduce

import * as utils from “cypress-somecompany-utils”;

Cypress Version

8.4.1

Other

No response

[adi518]

Just chiming in on this. I got this error after the target on my main tsconfig.json was changed to a later target than es5. My Cypress tsconfig.jsoon inherits from that file and so I got the error. I simply overrode the target for Cypress and set it back to es5.

[sainthkh]

Closing because of the inactivity.