feat: extend environment guard to recognise React Native

[DongGukMon]

Description

This library has no hard dependency on Browser. However, runtime detection relied solely on typeof document === 'undefined'. Because document is also undefined in React Native, the guard was triggered and the code bailed out, preventing overlay-kit from working on RN.

Changes

This patch adds an explicit React Native check (typeof navigator !== 'undefined' && navigator.product === 'ReactNative'') to useClientLayoutEffect in create-use-external-events.ts.
With the new guard, the library now operates correctly in React Native

navigator.product is officially deprecated(link), but I haven’t found a more reliable way to detect React Native yet, so this PR keeps that check for now.
If there’s a better approach, I’d appreciate your feedback and am happy to revise accordingly.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have performed a self-review of my own code.
• My code is commented, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.

Further Comments

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🦋 Changeset detected

Latest commit: c0a0d49

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
overlay-kit	Patch

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Name	Status	Preview	Comments	Updated (UTC)
overlay-kit	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 11, 2025 2:53am

[jungpaeng]

Thank you for your contribution.
Currently, I’m not working in a React Native environment, so I will set it up and run tests later.

By the way, are you using overlay-kit in a React Native environment?
I’m curious to know if it works properly in React Native.

[DongGukMon]

I confirmed the library has only a React dependency, so I integrated it into an Expo side-project I’m currently building. With the changes in this PR applied, everything works perfectly.

For now I’m running on a locally patched version, but I’m hoping this can be merged soon. It would be even better if React Native support could be declared officially in the future. Thanks!