Meta: Native support for ES Modules

EDIT: quick guide for getting started: https://jestjs.io/docs/ecmascript-modules ESM support will be unflagged in a future release of Node 12 (maybe not before April https://github.com/nodejs/node/pull/29866#issuecomment-574055057) and it is already unflagged in Node 13.2, so I think it's time to evaluate how we can add native support in Jest. I'll try to list which features Jest currently provides that are impacted by ESM support, and how we can solve/investigate them. There is issue #4842, but I think that's more of a discussion issue, while this issue will be geared towards actually implementing support and more suitable to track for those who just want to get the current implementation status. Any comments added to this issue _not_ related to how we can implement support for the below enumerated features will be marked as spam - please direct any workarounds/discussions to separate issues. Also feel free to tell us if anything related to ESM features is missing from the list! Please note that Jest will use the `vm` API (https://nodejs.org/api/vm.html) and as of writing (node ~v13.6~ v16.10) the ESM parts of this API is still flagged (`--experimental-vm-modules`). So saying ESM is unflagged is a bit of a misnomer at the moment. But I think we should start experimenting and potentially provide feedback to the [Modules WG](https://github.com/nodejs/modules). EDIT: Tracking issue for stabilization in Node: https://github.com/nodejs/node/issues/37648 Lastly, I'm writing t

Posted by SimenB on Jan 19, 2020, 1:22 PM

Tags

• support (Software)

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