What is the motivation or rationale behind making Typebox 1.x ESM only?

[shaharkedar]

Typebox 1.x is currently ESM only. Is there a reason why there's no dual build for Typebox? I read some issues where ESM and CJS were mentioned, but didn't manage to find a clear answer to that.

[sinclairzx81]

@shaharkedar Hi,

The main reason for going ESM only is because Node 18.x fell out of LTS this year, and 20.x (current LTS) supports ESM resolution from CJS (meaning libraries can publish ESM packages and have them consumed by CJS applications).

ESM packages are generally fine consume on newer versions of Node (which is what prompted dropping CJS), but mostly my preference is to only publish for a singular module system, not two, and EcmaScript modules is the Standard, so I just want to publish for that.

Hope that brings some insight.
S