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Immutable.js

List
Map
OrderedMap
Set
OrderedSet
Stack
Range()
Repeat()
Record
Record.Factory
Seq
Seq.Keyed
Seq.Indexed
Seq.Set
Collection
Collection.Keyed
Collection.Indexed
Collection.Set
ValueObject
OrderedCollection
fromJS()
is()
hash()
isImmutable()
isCollection()
isKeyed()
isIndexed()
isAssociative()
isOrdered()
isValueObject()
isSeq()
isList()
isMap()
isOrderedMap()
isStack()
isSet()
isOrderedSet()
isRecord()
get()
has()
remove()
set()
update()
getIn()
hasIn()
removeIn()
setIn()
updateIn()
merge()
mergeWith()
mergeDeep()
mergeDeepWith()

isMap()

True if maybeMap is a Map.

isMap(maybeMap: unknown): boolean

Discussion

Also true for OrderedMaps.

This documentation is generated from immutable.d.ts. Pull requests and Issues welcome.