[Replacement]: `is-map`

[gameroman]

Package to replace

is-map

Suggested replacement(s)

Object.prototype.toString.call(v) === "[object Map]"

Manifest type

micro-utility (tiny utility replaceable with native code or removal)

[ljharb]

To be clear, that's not a complete replacement because { [Symbol.toStringTag]: 'Map' } passes that check.

[43081j]

Almost all uses of this could also just use instanceof. The common use case isn't cross-realm.

May be worth noting that in the replacement text

[ljharb]

Totally - if you're not concerned about cross-realm, instanceof Map is the obvious choice (although that can still be faked by eg ({ __proto__: Map.prototype }) instanceof Map)