which-collection

SkillAI Toolmapsetweakmapweakset

Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

Directory Presence

Cross-referenced across 55 tracked directories

Directory	Status	First Seen	Last Confirmed	Link
N npm Skills Registry		3/13/2026	3/16/2026

Adoption Metrics

#4164

Popularity Rank

1 / 55

Listed In

Emerging

Adoption Stage

Listed For

Recently added to the ecosystem

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