import { Plugin , StateValueAtRoot , PluginCallbacks , State } from '@hookstate/core' ; const PluginID = Symbol ( 'LocalPersistence' ) ; export function Persistence ( localStorageKey ) { return ( ) => ( { id : PluginID , init : ( state ) => { const persisted = localStorage . getItem ( localStorageKey ) ; if ( persisted !== null ) { const result = JSON . parse ( persisted ) ; state . set ( result ) ; } else if ( ! state . promised && ! ! ! state . error ) { localStorage . setItem ( localStorageKey , JSON . stringify ( state . value ) ) ; } return { onSet : ( p ) => { if ( 'state' in p ) { localStorage . setItem ( localStorageKey , JSON . stringify ( p . state ) ) ; } else { localStorage . removeItem ( localStorageKey ) ; } } } as PluginCallbacks ; } } ) ; }