githubmirror/immutable-js

website/docs/isImmutable().mdx

20 строк572 B

Julien Deniau

Require to import

27 май 2025, 01:33

27 май 2025, 01:33b72fc3b

import Repl from '@/repl/Repl.tsx';
import CodeLink from '@/mdx-components/CodeLink.tsx';

# isImmutable()

True if `maybeImmutable` is an Immutable Collection or Record.

<Signature code={`isImmutable(maybeImmutable: unknown): boolean;`} />

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

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