# Namespace: `FILE`

[@jupyterlite/contents](jupyterlite_contents.md).FILE

A namespace for file constructs.


## Functions

### `getType`

>
> **`getType`**(`ext`, `defaultType?`): `string`

Get a mimetype (or fallback).

#### Parameters

| Name | Type | Default value |
| :------ | :------ | :------ |
| `ext` | `string` | `undefined` |
| `defaultType` | ``null`` \| `string` | `null` |

#### Returns

`string`

#### Defined in

[packages/contents/src/tokens.ts:156](https://github.com/jupyterlite/jupyterlite/blob/8254ff2/packages/contents/src/tokens.ts#L156)



### `hasFormat`

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

Determine whether the given extension matches a given fileFormat.

#### Parameters

| Name | Type |
| :------ | :------ |
| `ext` | `string` |
| `fileFormat` | ``"json"`` \| ``"text"`` \| ``"base64"`` |

#### Returns

`boolean`

#### Defined in

[packages/contents/src/tokens.ts:172](https://github.com/jupyterlite/jupyterlite/blob/8254ff2/packages/contents/src/tokens.ts#L172)