isImmutable()

True if maybeImmutable is an Immutable Collection or Record.

isImmutable(maybeImmutable: unknown): boolean;

Note: Still returns true even if the collections is within a withMutations().

import { isImmutable, Map, List, Stack } from 'immutable';
isImmutable([]); // false
isImmutable({}); // false
isImmutable(Map()); // true
isImmutable(List()); // true
isImmutable(Stack()); // true
isImmutable(Map().asMutable()); // true