Function updateTransientState

src/index.ts:325–367

(
  state: SwipeableState,
  props: SwipeablePropsWithDefaultOptions,
  previousProps: SwipeablePropsWithDefaultOptions,
  attachTouch: AttachTouch
)

}

function updateTransientState(
  state: SwipeableState,
  props: SwipeablePropsWithDefaultOptions,
  previousProps: SwipeablePropsWithDefaultOptions,
  attachTouch: AttachTouch
) {
  // if trackTouch is off or there is no el, then remove handlers if necessary and exit
  if (!props.trackTouch || !state.el) {
    if (state.cleanUpTouch) {
      state.cleanUpTouch();
    }

    return {
      ...state,
      cleanUpTouch: undefined,
    };
  }

  // trackTouch is on, so if there are no handlers attached, attach them and exit
  if (!state.cleanUpTouch) {
    return {
      ...state,
      cleanUpTouch: attachTouch(state.el, props),
    };
  }

  // trackTouch is on and handlers are already attached, so if preventScrollOnSwipe changes value,
  // remove and reattach handlers (this is required to update the passive option when attaching
  // the handlers)
  if (
    props.preventScrollOnSwipe !== previousProps.preventScrollOnSwipe ||
    props.touchEventOptions.passive !== previousProps.touchEventOptions.passive
  ) {
    state.cleanUpTouch();

    return {
      ...state,
      cleanUpTouch: attachTouch(state.el, props),
    };
  }

  return state;
}

export function useSwipeable(options: SwipeableProps): SwipeableHandlers {
  const { trackMouse } = options;