import { interfaces } from 'inversify' ; import { useContext , useRef } from 'react' ; import { InversifyReactContext } from './internal' ; see https see https function useLazyRef < T > ( resolveValue ) { const ref = useRef < { v : T ; } > ( ) ; if ( ! ref . current ) { ref . current = { v : resolveValue ( ) } ; } return ref . current . v ; } /**
 * Resolves container or something from container (if you specify resolving function)
 */ export function useContainer ( ) ; export function useContainer < T > ( resolve ) ; export function useContainer < T > ( resolve ? ) { const container = useContext ( InversifyReactContext ) ; if ( ! container ) { throw new Error ( 'Cannot find Inversify container on React Context. ' + '`Provider` component is missing in component tree.' ) ; } return resolve ? useLazyRef ( ( ) => resolve ( container ) ) : container ; } /**
 * Resolves injection by id (once, at first render).
 */ export function useInjection < T > ( serviceId ) { return useContainer ( container => container . get < T > ( serviceId ) ) ; } export function useOptionalInjection < T , D > ( serviceId , resolveDefault ) ; export function useOptionalInjection < T > ( serviceId ) ; /**
 * Resolves injection if it's bound in container
 */ export function useOptionalInjection < T , D > ( serviceId , resolveDefault = ( ) => undefined ) { return useContainer ( container => container . isBound ( serviceId ) ? container . get ( serviceId ) : resolveDefault ( container ) ) ; } /**
 * uses container.getAll(), works like @multiInject()
 * https://github.com/inversify/InversifyJS/blob/master/wiki/container_api.md#containergetall
 * https://github.com/inversify/InversifyJS/blob/master/wiki/multi_injection.md
 */ export function useAllInjections < T > ( serviceId ) { return useContainer ( container => container . getAll ( serviceId ) ) ; }