Ecma Incompatibilityfeaturegood first issue
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説明
WeakRef, for referring to a target object without preserving it from garbage collection FinalizationRegistry, to manage registration and unregistration of cleanup operations performed when target objects are garbage collected
Proposal: https://github.com/tc39/proposal-weakrefs MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakRef