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[@jupyterlite](../../../README.md) / [@jupyterlite/services](../README.md) / instanceOfStream

# Function: instanceOfStream()

> **instanceOfStream**(`nodeOrStream`): `nodeOrStream is IEmscriptenStream`

Defined in: [packages/services/src/contents/emscripten.ts:79](https://github.com/jupyterlite/jupyterlite/blob/5d565b7c8e2c6a07c22d592b848261a0d170de64/packages/services/src/contents/emscripten.ts#L79)

## Parameters

### nodeOrStream

[`IEmscriptenFSNode`](../interfaces/IEmscriptenFSNode.md) | [`IEmscriptenStream`](../interfaces/IEmscriptenStream.md)

## Returns

`nodeOrStream is IEmscriptenStream`