[youtubei.js](../../../README.md) / [JsHelpers](../README.md) / memberBaseName

# Function: memberBaseName()

> **memberBaseName**(`memberExpression`, `source`): `string` \| `null`

Retrieves the base identifier for a member expression chain.

## Parameters

• **memberExpression**: `MemberExpression`

Member expression whose root should be resolved.

• **source**: `string`

Original source code for range lookups.

## Returns

`string` \| `null`

## Defined in

[src/utils/javascript/helpers.ts:193](https://github.com/LuanRT/YouTube.js/blob/af92984523f90200a18314b94478a2697c9deab0/src/utils/javascript/helpers.ts#L193)