Support `beforeInput` event

[zombieJ]

Describe the feature you'd like:

fireEvent support beforeInput event

Suggested implementation:

N/A

Describe alternatives you've considered:

N/A

Teachability, Documentation, Adoption, Migration Strategy:

N/A

[hjonasson]

@zombieJ Could you please describe beforeInput in some detail so it can be investigated further.

[eps1lon]

It doesn't look like this bug report has enough info for one of us to reproduce it.

Please provide a CodeSandbox (https://react.new), or a link to a repository on GitHub.

Here are some tips for providing a minimal example: https://stackoverflow.com/help/mcve

[gsuntres]

I've stumbled over this issue too.

Using jest, jest-environment-jsdom and @testing-library/react to test an input element that is hooked to onBeforeInput and changes the target's value.

A minimal live example https://codesandbox.io/s/dank-snowflake-ott8rx

And a repo with the problematic test https://github.com/gsuntres/testing-library-bug

[MatanBobi]

Keep in mind that React aren't actually using the beforeinput event, so even if we add support for that, it won't work in RTL: facebook/react#11211.
I'll look up what needs to be added to support that specific event in DTL (but again, it won't solve the issue for React Testing Library).