12.1.0 no longer importable in node with ESM

[sventschui]

💥 Regression Report

The exports map added in 12.1.0 break import 'react-i18next' / import("react-i18next") statements in node.js (require('react-i18next') still working fine).

Last working version

Worked up to version: 12.0.0

Stopped working in version: 12.1.0

To Reproduce

Steps to reproduce the behavior:

• Install react-18next@12.1.0
• Run node --experimental-specifier-resolution=node --input-type module --eval 'import { I18nextProvider } from "react-i18next"'

Expected behavior

Should not crash. (Note a warning about experimental node flags will be printed)

Actual behaviour

Crashes with the following error:

node --experimental-specifier-resolution=node --input-type module --eval 'import { I18nextProvider } from "react-i18next"'
(node:89634) ExperimentalWarning: The Node.js specifier resolution flag is experimental. It could change or be removed at any time.
(Use `node --trace-warnings ...` to show where the warning was created)
******[eval1]:1
import { I18nextProvider } from "react-i18next"
         ^^^^^^^^^^^^^^^
SyntaxError: Named export 'I18nextProvider' not found. The requested module 'react-i18next' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'react-i18next';
const { I18nextProvider } = pkg;

Potential fixes

• Use .mjs instead of .js extension to let node know the files are in ESM format (i.e. dist/es/index.mjs instead of dist/es/index.js)
• Create a dist/package.json file with the contents { "type": "module" } to let node know the files are in ESM format.

Your Environment

• runtime version: node 16, 18, 19
• i18next version: n/a
• os: Mac

[adrai]

v12.1.1 should fix this

[sventschui]

Thanks for this quick fix, really appreciated 🥇

[adrai]

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