I use next.js. When exporting a type in a file index.ts in a third party package an error occurs.
Module parse failed: Unexpected token (23:7)
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 type { Validate } from './src/nullable'
This issue occurs when you have fewer configurations than what you want to use.
In your case, you are trying to use Typescript on your NextJS project. Unfortunately, your Webpack configuration doesn't have a Typescript file loader.
There are two ways to solve this issue: