Adding .js extension to import of .ts file results in error

[richardkazuomiller]

In order to build ESModules with TypeScript, we need to import our .ts files with a .js extension, like ./path/to/file.js. If I enable eslint-plugin-import, it throws the error Missing file extension "ts" for "./path/to/file.js" import/extensions. How do I configure eslint-plugin-import to allow me to import files the way they need to be imported in order to export valid ESM?

[ljharb]

Duplicate of #2170.