# Class: `ServiceWorkerManager`

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

## Implements

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


## Constructors

### `constructor`

>
> **`new ServiceWorkerManager`**(`options?`)

#### Parameters

| Name | Type |
| :------ | :------ |
| `options?` | [`IOptions`](../interfaces/jupyterlite_server.IServiceWorkerManager.IOptions.md) |

#### Defined in

[packages/server/src/service-manager.ts:11](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L11)

## Properties

### `_ready`

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

#### Defined in

[packages/server/src/service-manager.ts:115](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L115)



### `_registration`

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

#### Defined in

[packages/server/src/service-manager.ts:111](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L111)



### `_registrationChanged`

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

#### Defined in

[packages/server/src/service-manager.ts:112](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L112)

## 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:33](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L33)



### `ready`

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

#### Returns

`Promise`<`void`\>

#### Implementation of

IServiceWorkerManager.ready

#### Defined in

[packages/server/src/service-manager.ts:37](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L37)



### `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:23](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L23)

## Methods

### `_setRegistration`

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

#### Parameters

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

#### Returns

`void`

#### Defined in

[packages/server/src/service-manager.ts:106](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L106)



### `initialize`

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

#### Parameters

| Name | Type |
| :------ | :------ |
| `workerUrl` | `string` |

#### Returns

`Promise`<`void`\>

#### Defined in

[packages/server/src/service-manager.ts:66](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L66)



### `unregisterOldServiceWorkers`

>
> `Private` **`unregisterOldServiceWorkers`**(`scriptURL`): `void`

#### Parameters

| Name | Type |
| :------ | :------ |
| `scriptURL` | `string` |

#### Returns

`void`

#### Defined in

[packages/server/src/service-manager.ts:41](https://github.com/jupyterlite/jupyterlite/blob/c78cc8d/packages/server/src/service-manager.ts#L41)