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

# Function: extractNodeSource()

> **extractNodeSource**(`node`, `source`): `string` \| `null`

Extracts the source code corresponding to a given AST node.

## Parameters

• **node**: `undefined` \| `null` \| `Node`

The AST node to extract source from.

• **source**: `string`

The original source code.

## Returns

`string` \| `null`

The source code corresponding to the node, or null if not available.

## Defined in

[src/utils/javascript/helpers.ts:143](https://github.com/LuanRT/YouTube.js/blob/af92984523f90200a18314b94478a2697c9deab0/src/utils/javascript/helpers.ts#L143)