Port proposal-upsert methods to getScriptTargetFeatures#2809

Merged

jakebailey merged 3 commits intomainfrom

copilot/port-proposal-upsert-methods

Feb 17, 2026

Commits on Feb 17, 2026

Initial plan
Copilot
committed
Add getOrInsert and getOrInsertComputed to Map and WeakMap in script target features

Copilot
and
jakebailey
committed
Remove incorrect entries/keys/values from WeakMap and WeakSet feature map

Copilot
and
jakebailey
committed