Function hasExplicitCallback

packages/runtime-dom/src/components/Transition.ts:111–119

(
  hook: Function | Function[] | undefined,
)

 * intends to explicitly control the end of the transition.
 */
const hasExplicitCallback = (
  hook: Function | Function[] | undefined,
): boolean => {
  return hook
    ? isArray(hook)
      ? hook.some(h => h.length > 1)
      : hook.length > 1
    : false
}

export function resolveTransitionProps(
  rawProps: TransitionProps,