Function listenToPageActivation

listenToPageActivation(
fireImmediately: boolean,
listener: (isPageActive: boolean) => void | Promise<void>,
): RemoveListenerCallback
Listen to changes in page activation.
Parameters
- fireImmediately: boolean
  If true, the callback will immediately be fired with whatever the current value is.
- listener: (isPageActive: boolean) => void | Promise<void>
  This listener will be called any time the page activation changes.
Returns RemoveListenerCallback
A callback used to remove the listener.
- Defined in index.ts:10