Crarify which versions support package.json:"type":"module"

[dilyanpalauzov]

https://medium.com/@nodejs/announcing-core-node-js-support-for-ecmascript-modules-c5d6dc29b663 says that Node 13.2.0 is the first version to understand in package.json "type":"module". This was the reason I switched to Node 13.

Now https://nodejs.org/docs/latest-v12.x/api/esm.html#esm_package_json_type_field says that v12 supports this "type":"module" option.

Apparently this option is not valid for all Node v12 releases.

Please amend the documentation to state since which v12 and v13 releases this option is enabled, so that this information can be included in the package.json: "engines" field. Ideally also provide information how the engines field should look like.

[aduh95]

Node.js v12 does support it, however you need to use the --experimental-modules CLI flag to enable the feature. The removal of the flag is discussed on #33055.

I get your point regarding the lack of clear information for what version which feature. I'm working on refactoring this part of the docs on #32970, I could add info about which version introduced support for each package.json field.