# Functions

<a id="isu8a"></a>

##  isU8a

▸ **isU8a**(value?: *`any`*): `boolean`

*Defined in [is/u8a.ts:21](https://github.com/polkadot-js/common/blob/420f807/packages/util/src/is/u8a.ts#L21)*

*__name__*: isU8a

*__summary__*: Tests for a `Uint8Array` object instance.

*__description__*: Checks to see if the input object is an instance of `Uint8Array`.

*__example__*:   

```javascript
import { isUint8Array } from '@polkadot/util';

console.log('isU8a', isU8a([])); // => false
```

**Parameters:**

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

**Returns:** `boolean`

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