Reproduction example

Not a website

Prerequisites

Reproduce

1. Run with node 14, so e.g. nvm use 14
2. run any test that imports this library

Expected behavior

With no major version bump this package should still be possible to load.

Actual behavior

It fails, saying ??= isn't supported.

User-event version

14.4.0

Environment

Testing Library framework:

JS framework:

DOM implementation:

Additional context

Suggest to either make this a major version bump,

or look into what went wrong with the build pipeline change in this version -> fd8f219