elk/page-lifecycle.d.ts

declare module 'page-lifecycle/dist/lifecycle.mjs' {
    type PageLifecycleState = 'active' | 'passive' | 'hidden' | 'frozen' | 'terminated'

    interface PageLifecycleEvent extends Event {
        newState: PageLifecycleState
        oldState: PageLifecycleState
    }
    interface PageLifecycle extends EventTarget {
        get state(): PageLifecycleState
        get pageWasDiscarded(): boolean
        addUnsavedChanges: (id: Symbol | any) => void
        removeUnsavedChanges: (id: Symbol | any) => void
        addEventListener: (type: string, listener: (evt: PageLifecycleEvent) => void) => void
    }
    const lifecycle: PageLifecycle
    export default lifecycle
}