[**@jupyterlite**](../../../../../README.md)

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[@jupyterlite](../../../../../README.md) / [@jupyterlite/services](../../../README.md) / [FILE](../README.md) / hasFormat

# Function: hasFormat()

> **hasFormat**(`ext`, `fileFormat`): `boolean`

Defined in: [packages/services/src/contents/tokens.ts:44](https://github.com/jupyterlite/jupyterlite/blob/14439ec34e3cade5baa221a050277e15da9d0c06/packages/services/src/contents/tokens.ts#L44)

Determine whether the given extension matches a given fileFormat.

## Parameters

### ext

`string`

### fileFormat

`"base64"` | `"text"` | `"json"`

## Returns

`boolean`