> For the complete documentation index, see [llms.txt](https://docs.justaname.id/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.justaname.id/sdk-reference/justaname-react-sdk/functions/splitdomain.md).

# splitDomain

Splits a domain string into its subdomain and parent domain parts.

***

## Usage

```typescript
import { splitDomain } from '@justaname.id/react'

// Basic usage
const [subdomain, parentDomain] = splitDomain('alice.justaname.eth')
```

```typescript
// With different domain formats
const [subdomain, parentDomain] = splitDomain('bob.example.eth')
// Returns: ['bob', 'example.eth']

const [subdomain, parentDomain] = splitDomain('test.subdomain.justaname.eth')
// Returns: ['test', 'subdomain.justaname.eth']
```

***

## Returns

\[`string`, `string`] - A tuple containing:

* **First element**: The subdomain part
* **Second element**: The parent domain part

## Parameters

* **domain**: `string` - The domain string to split

## Defined in

[packages/@justaname.id/react/src/lib/helpers/splitDomain/index.ts:1](https://github.com/JustaName-id/JustaName-sdk/blob/dc845c10af242e3ca87d95ef392516ac0bfa8b95/packages/@justaname.id/react/src/lib/helpers/splitDomain/index.ts#L1)