---
url: /reference/@cssdoc/providers/functions/definitionForFunction.md
---
# Function: definitionForFunction()

```ts
function definitionForFunction(name, index): Location | undefined;
```

Defined in: [packages/providers/src/index.ts:220](https://github.com/thedannywahl/cssdoc/blob/main/packages/providers/src/index.ts#L220)

Definition of a custom function (its `@function` rule).

## Parameters

### name

`string`

### index

[`CssDocIndex`](../../index/classes/CssDocIndex.md)

## Returns

[`Location`](../../index/interfaces/Location.md) | `undefined`