Function getInitialMicrosteps

packages/core/src/transition.ts:97–131

(
  machine: T,
  ...[input]: undefined extends InputFrom<T>
    ? [input?: InputFrom<T>]
    : [input: InputFrom<T>]
)

 * This is a pure function that does not execute `actions`.
 */
export function getInitialMicrosteps<T extends AnyStateMachine>(
  machine: T,
  ...[input]: undefined extends InputFrom<T>
    ? [input?: InputFrom<T>]
    : [input: InputFrom<T>]
): Array<[SnapshotFrom<T>, ExecutableActionsFrom<T>[]]> {
  const actorScope = createInertActorScope(machine);
  const initEvent = createInitEvent(input);
  const internalQueue: AnyEventObject[] = [];

  const preInitialSnapshot = machine._getPreInitialState(
    actorScope,
    initEvent,
    internalQueue
  );

  const first = initialMicrostep(
    machine.root,
    preInitialSnapshot,
    actorScope,
    initEvent,
    internalQueue
  );

  const { microsteps } = macrostep(
    first[0],
    initEvent,
    actorScope,
    internalQueue
  );

  return [first, ...microsteps] as Array<
    [SnapshotFrom<T>, ExecutableActionsFrom<T>[]]
  >;
}

/**
 * Gets all potential next transitions from the current state.