xstate-helpers/react/useIsXStateTransitionAvailable/dist/xstate-helpers-react-useIsXStateTransitionAvailable.esm.js

A collection of helpers for XState (with React).

import { useCallback } from 'react';
import { useSelector } from '@xstate/react';

/**
 * @deprecated depricated in favor of useStateCan()
 */

function useIsXStateTransitionAvailable(service, event) {
  if ( // Machines invoked as services will be initially deferred:
  // https://github.com/statelyai/xstate/blob/5da8724bb6c4dada5d6e8cc61e36c7e2c771838b/packages/core/src/Actor.ts#L74-L94
  //
  // Because we don't know what a deferred service will initialize to,
  // we shouldn't throw if it doesn't have a "machine" property
  //
  // @ts-ignore
  !service.deferred && !service.machine) {
    throw new Error('The service given to useIsXStateTransitionAvailable() must be a state machine instance.');
  }

  return useSelector(service, useCallback(state => !!service.machine && !!service.machine.transition(state, event).changed, [service, event]));
}

export { useIsXStateTransitionAvailable };