SwUpdate

class

Subscribe to update notifications from the Service Worker, trigger update checks, and forcibly activate updates.

      
      class SwUpdate {
  available: Observable<UpdateAvailableEvent>
  activated: Observable<UpdateActivatedEvent>
  unrecoverable: Observable<UnrecoverableStateEvent>
  isEnabled: boolean
  checkForUpdate(): Promise<void>
  activateUpdate(): Promise<void>
}

参见

Service worker communication guide

Provided in

```
      
      ServiceWorkerModule
    
```

属性

属性	说明
`available: Observable<UpdateAvailableEvent>`	只读 Emits an `UpdateAvailableEvent` event whenever a new app version is available.
`activated: Observable<UpdateActivatedEvent>`	只读 Emits an `UpdateActivatedEvent` event whenever the app has been updated to a new version.
`unrecoverable: Observable<UnrecoverableStateEvent>`	只读 Emits an `UnrecoverableStateEvent` event whenever the version of the app used by the service worker to serve this client is in a broken state that cannot be recovered from without a full page reload.
`isEnabled: boolean`	只读 True if the Service Worker is enabled (supported by the browser and enabled via `ServiceWorkerModule`).

方法

checkForUpdate()
`checkForUpdate(): Promise<void>` 参数没有参数。返回值 `Promise<void>`

activateUpdate()
`activateUpdate(): Promise<void>` 参数没有参数。返回值 `Promise<void>`

参见link

Provided inlink

属性link

方法link

checkForUpdate() link

参数

返回值

activateUpdate() link

参数

返回值

参见

Provided in

属性

方法

checkForUpdate()

activateUpdate()