parcel-issue-min-repo

This repo demonstrates an issue with Parcel bundler where Babel doesn’t compile a third-party module, micromodal (which unfortunately exports ES2015+ code).

Expection

Because the module meets the following criteria:

• module directory is symlinked into node_modules (by way of Yarn Workspaces)
• module package.json has a source field set

It is expected that the module would be compiled by Babel.

As of Parcel 1.12.3, it does not.

This contrasts with the expectations set in the Parcel Docs: Transforming Third-Party Modules.

Example Structure

This repo has two Yarn Workspace packages:

• the main app @test/front-end (./front-end/)
• the wrapped dependency @test/uncompiled-dependencies (./uncompiled-dependencies/)

@test/front-end depends on MicroModal, which is imported/destructured from @test/uncompiled-dependencies.

In either package, browserslist and babel are set in package.json