esmodule interop error on building the repo

[AdityaDonthy]

I tried to build this on node 12 and 14, in both the versions I see the following error on npm run build.

> parcel build index.html lessons/**/*.html applications/**/*.html

Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /Users/adityad/Proj-Root/rx-js-fem/rxjs-fundamentals/node_modules/weak-lru-cache/index.js
require() of ES modules is not supported.
require() of /Users/adityad/Proj-Root/rx-js-fem/rxjs-fundamentals/node_modules/weak-lru-cache/index.js from /Users/adityad/Proj-Root/rx-js-fem/rxjs-fundamentals/node_modules/lmdb-store/caching.js 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 index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /Users/bsd/Proj/rx-js-fem/rxjs-fundamentals/node_modules/weak-lru-cache/package.json.

[AdityaDonthy]

@stevekinney Any help is appreciated on this. I've tried both the suggestions mentioned in the error, it did not fix the issue :(

[9kartik]

@AdityaDonthy , node 14.18.2, seems to be working fine.