Going pure ESM 🚀

[simenandre]

Hello people!

As the world moves towards ESM, I suggest we move the class-validator to pure ESM.

We already have a dependency that is now only available for ESM. libphonenumber-js from v1.10. Hopefully, validator.js also goes ESM at some point.

Read more here:
https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c

[Zauras]

Hello, about class-validator usage inside pure ESM build,

Trying to migrate to Node 20 with pure ESM build. Major issue: class-validator defaulting to ./cjs build. If using direct import like class-validator/esm2015/index.js - the package do not have "type":"module" so it's CommonJS.

Tried to use RollUp commonJS to ESM converter plugin - no luck.

Tried to use Babel decorators plugin - if setting the newest proposal - getting runtime error (because class-validator defaulting to use its' ./cjs build), if setting "legacy":true - build becomes incompatible with pure ESM.

Form all my experiments I would assume package is not usable with ESM or am I missing something ?