# Functions

<a id="isobservable"></a>

##  isObservable

▸ **isObservable**(value: *`any`*): `boolean`

*Defined in [is/observable.ts:26](https://github.com/polkadot-js/common/blob/9864646/packages/util/src/is/observable.ts#L26)*

*__name__*: isBObservable

*__summary__*: Tests for a `Observable` object instance.

*__description__*: Checks to see if the input object is an instance of `BN` (bn.js).

*__example__*:   

```javascript
import { isObservable } from '@polkadot/util';

console.log('isObservable', isObservable(...));
```

**Parameters:**

| Name | Type |
| ------ | ------ |
| value | `any` |

**Returns:** `boolean`

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