Function useImperativeHandle

packages/nerv/src/hooks.ts:217–233

(
  ref: RefObject<T> | undefined,
  init: () => R,
  deps?: DependencyList
)

}

export function useImperativeHandle<T, R extends T> (
  ref: RefObject<T> | undefined,
  init: () => R,
  deps?: DependencyList
): void {
  useLayoutEffect(() => {
    if (isFunction(ref)) {
      ref(init())
      return () => ref(null)
    } else if (!isUndefined(ref)) {
      ref.current = init()
      return () => {
        delete ref.current
      }
    }
  }, isArray(deps) ? deps.concat([ref]) : undefined)
}