Feathers Crow running on TS 4.5 native ESM

[FossPrime]

• CodeSandbox stock-ish TS crow app
  • Hitting server restart will not clear node_modules, for that do rm -rf, then hit server restart
  • The IDE is running TS 4.1.2... ignore the UI, package.json is using TS 4.5-beta
  • If you run this on your machine, make sure to use ts-node 10.4.0, as it has support for loader API changes made between Node 16.8-16.12

Changes needed:

• Like deno, importing modules needs to be unambiguous. But as node doesn't natively support ts, the extension still needs to be .js
  • Instead of ./middleware you import ./middleware/index.js
  • Instead of ./channels you import ./channels.js
• A number of feathers modules have index.d.ts implicitly loaded, those need to be explicit
• Some of the module typescript relies on ESM compatibility layers between TS pseudo-ESM and CommonJS. Those stop working when running TS backed by native Node ESM.
• '@feathersjs/configuration' mixes default exports with named exports, which cause it's CommonJS default export to be exposed under a .default property.
  • If we can re export configuration under default, the CJS and ESM Typescript would check out.
• Winston has no named exports for ESM
• Node's path module has no default export under ESM...
  • Change import path from 'path' to import { join } from path, or use * as path
• feathers-nedb has a broken devDependency, nedb. I added an ambient type and removed the user.class.ts reference to hide the issue.
• path has no default import under ESM

I've included a shell script to handle node_modules TS issues in the meantime.

# The main property changes aren't strictly necessary but highly advised by the TS handbook
sed -i '6s/"main": "lib\/",/"main": "\.\/lib\/index\.js",/' ./node_modules/\@feathersjs/configuration/package.json
sed -i '7s/"types": "lib\/",/"types": "\.\/lib\/index\.d\.ts",/' ./node_modules/\@feathersjs/configuration/package.json
sed -i '6s/"main": "lib\/",/"main": "\.\/lib\/index\.js",/' ./node_modules/\@feathersjs/authentication/package.json
sed -i '7s/"types": "lib\/",/"types": "\.\/lib\/index\.d\.ts",/' ./node_modules/\@feathersjs/authentication/package.json
sed -i '6s/"main": "lib\/",/"main": "\.\/lib\/index\.js",/' ./node_modules/\@feathersjs/authentication-local/package.json
sed -i '7s/"types": "lib\/",/"types": "\.\/lib\/index\.d\.ts",/' ./node_modules/\@feathersjs/authentication-local/package.json

sed -i '6s/"main": "lib\/",/"main": "\.\/lib\/index\.js",/' ./node_modules/\@feathersjs/authentication-oauth/package.json
sed -i '7s/"types": "lib\/",/"types": "\.\/lib\/index\.d\.ts",/' ./node_modules/\@feathersjs/authentication-oauth/package.json

# unfixably bad types... needs generics
sed -i '6s/"main": "lib\/",/"main": "\.\/lib\/index\.js",/' ./node_modules/feathers-nedb/package.json
# sed -i '7s/"types": "types",/"types": "\.\/types\/index\.d\.ts",/' ./node_modules/feathers-nedb/package.json

sed -i '2s/import express/import \* as express/' ./node_modules/\@feathersjs/express/index.d.ts
sed -i '1s/import http/import \* as http/' ./node_modules/\@feathersjs/socketio/index.d.ts
sed -i '2s/import io/import \* as io/' ./node_modules/\@feathersjs/socketio/index.d.ts
sed -i '8s/"source",/"\.\/source\/index\.js",\n"types": "\.\/index\.d\.ts",/' ./node_modules/chalk/package.json