is-map
Is this value a JS Map? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
is-set
Is this value a JS Set? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
is-weakmap
Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
is-weakset
Is this value a JS WeakSet? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
extra-map
A group of functions for working with Maps.