[polyfill] Add warning for bad Map/Set polyfills #33575
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Add detection and warning for incorrect Map/Set polyfill implementations that don't properly support non-string keys. This helps developers identify issues with polyfills that break React's internal mechanisms. - Add BadMapPolyfill module to detect problematic implementations - Include comprehensive tests for the detection logic - Warn users when their polyfills may cause React to malfunction Fixes issues where bad polyfills silently break React functionality.
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Summary
Add detection and warning for incorrect Map/Set polyfill implementations that don't properly support non-string keys.
Details
BadMapPolyfillmodule to detect problematic implementationsThis helps developers identify issues with polyfills that break React's internal mechanisms.
Test Plan
BadMapPolyfill-test.js