# Class: `ServiceWorkerManager`

[@jupyterlite/server](../modules/jupyterlite_server.md).ServiceWorkerManager

## Implements

- [`IServiceWorkerManager`](../modules/jupyterlite_server.md#iserviceworkermanager)

## Constructors

### `constructor`

> **`new ServiceWorkerManager`**()

#### Defined in

[packages/server/src/service-manager.ts:9](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L9)

## Properties

### `_ready`

> `Private` **`_ready`**: `PromiseDelegate`<`void`\>

#### Defined in

[packages/server/src/service-manager.ts:79](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L79)

### `_registration`

> `Private` **`_registration`**: `null` \| `ServiceWorkerRegistration` = `null`

#### Defined in

[packages/server/src/service-manager.ts:75](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L75)

### `_registrationChanged`

> `Private` **`_registrationChanged`**:
> `Signal`<[`ServiceWorkerManager`](jupyterlite_server.ServiceWorkerManager.md), `null`
> \| `ServiceWorkerRegistration`\>

#### Defined in

[packages/server/src/service-manager.ts:76](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L76)

## Accessors

### `enabled`

> `get` **`enabled`**(): `boolean`

Whether the ServiceWorker is enabled or not.

#### Returns

`boolean`

#### Implementation of

IServiceWorkerManager.enabled

#### Defined in

[packages/server/src/service-manager.ts:26](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L26)

### `ready`

> `get` **`ready`**(): `Promise`<`void`\>

#### Returns

`Promise`<`void`\>

#### Implementation of

IServiceWorkerManager.ready

#### Defined in

[packages/server/src/service-manager.ts:30](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L30)

### `registrationChanged`

> `get` **`registrationChanged`**():
> `ISignal`<[`IServiceWorkerManager`](../modules/jupyterlite_server.md#iserviceworkermanager),
> `null` \| `ServiceWorkerRegistration`\>

A signal emitted when the registration changes.

#### Returns

`ISignal`<[`IServiceWorkerManager`](../modules/jupyterlite_server.md#iserviceworkermanager),
`null` \| `ServiceWorkerRegistration`\>

#### Implementation of

IServiceWorkerManager.registrationChanged

#### Defined in

[packages/server/src/service-manager.ts:16](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L16)

## Methods

### `initialize`

> `Private` **`initialize`**(): `Promise`<`void`\>

#### Returns

`Promise`<`void`\>

#### Defined in

[packages/server/src/service-manager.ts:34](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L34)

### `setRegistration`

> `Private` **`setRegistration`**(`registration`): `void`

#### Parameters

| Name           | Type                                  |
| :------------- | :------------------------------------ |
| `registration` | `null` \| `ServiceWorkerRegistration` |

#### Returns

`void`

#### Defined in

[packages/server/src/service-manager.ts:70](https://github.com/jupyterlite/jupyterlite/blob/7971e0aa/packages/server/src/service-manager.ts#L70)