structuredClone loses ArrayBuffer and typed-array data

[OskarEichler]

Description

The React Native structuredClone polyfill treats ArrayBuffer, DataView, and every typed array as arbitrary objects, returning plain objects that lose their internal bytes, view type, offsets, lengths, and shared backing-buffer relationships.

Expected behavior

ArrayBuffers should be copied through the intrinsic operation; DataView and all supported typed-array kinds should be reconstructed with their original offset/length and should share the same cloned backing buffer when cloned together. User-shadowed slice or constructor properties must not be invoked. Transfer support is outside this issue.

React Native Version

0.87.1 and current main

Affected Platforms

JavaScript runtime - All

[react-native-bot]

Warning

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[react-native-bot]

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