structuredClone coerces boxed primitives and flips false Boolean

Description

The React Native structuredClone polyfill reconstructs Number, String, Boolean, and Date wrappers by passing the source object to a constructor. Number/String cloning invokes user coercion hooks, and new Boolean(new Boolean(false)) uses object truthiness and silently changes the internal value to true.

Expected behavior

Cloning should read each wrapper's internal primitive through the built-in valueOf intrinsic, create a distinct wrapper with the same value, and never execute user coercion. Native structuredClone follows this behavior.

React Native Version

0.87.1 and current main

Affected Platforms

JavaScript runtime - All

React Native の structuredClone polyfill のエントリポイントから開始し、boxed Number、String、Boolean、Date の値で動作を再現します。clone がユーザーの coercion hook を実行せずに内部のプリミティブを読み取り、false の Boolean 値を保持し、別個の wrapper を作成することを確認します。結果を native structuredClone と比較します。