Failed to import in Node

[rainst]

I'm working on a new node project with typescript and I'm getting stuck when trying to import the geodesy module.
I've been doing some research before deciding to write here but I wasn't able to solve the issue.

• node 15.0.1
• geodesy 2.2.2

this is how I'm importing the lib:
import LatLon from "geodesy/latlon-ellipsoidal-vincenty.js";

and this is the error the compiler gives me:

Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /Users/brein/projects/msfs/msfs-airports-api/node_modules/geodesy/latlon-ellipsoidal-vincenty.js
require() of ES modules is not supported.
require() of /Users/brein/projects/msfs/msfs-airports-api/node_modules/geodesy/latlon-ellipsoidal-vincenty.js from /Users/brein/projects/msfs/msfs-airports-api/src/database/index.ts is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename latlon-ellipsoidal-vincenty.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /Users/brein/projects/msfs/msfs-airports-api/node_modules/geodesy/package.json.

at new NodeError (node:internal/errors:258:15)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1100:13)
at Module.load (node:internal/modules/cjs/loader:948:32)
at Function.Module._load (node:internal/modules/cjs/loader:789:14)
at Module.require (node:internal/modules/cjs/loader:972:19)
at require (node:internal/modules/cjs/helpers:88:18)
at Object.<anonymous> (/Users/brein/projects/msfs/msfs-airports-api/src/database/index.ts:2:1)
at Module._compile (node:internal/modules/cjs/loader:1083:30)
at Module.m._compile (/Users/brein/projects/msfs/msfs-airports-api/node_modules/ts-node/src/index.ts:1043:23)
at Module._extensions..js (node:internal/modules/cjs/loader:1112:10)

I found similar issues where the solution was to use esm to import modules, but according to the README:

The library can be loaded from npm to be used in a Node.js app (in Node.js v13.2.0+, or using the esm package in v8.0.0–v12.15.0*)

and to this:
#79 (comment)

since I'm using node 15 it should just work... or am I missing something?

PS: I tried also installing esm and launch with ts-node -r esm just to get a different error

[rainst]

so after doing some more research I found out I had to add type: module in package.json but then it felt like opening pandora's box as it looks like ts-node is not fully supporting esm modules :(

[chrisveness]

If you're having difficulties using ES6 modules, the best thing might be for you to use [email protected].

Documentation is available on the v1.1.3 readme, with notes documenting the differences between v1 & v2 at www.movable-type.co.uk/scripts/geodesy-library-migrating-from-v1.html.