# 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/7971e0aa/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/7971e0aa/packages/contents/src/tokens.ts#L172)