Function onTransitionEnd

packages/react-aria/src/utils/runAfterTransition.ts:56–83

(e: Event)

  };

  let onTransitionEnd = (e: Event) => {
    let eventTarget = getEventTarget(e);
    if (!isTransitionEvent(e) || !eventTarget) {
      return;
    }
    // Remove property from list of transitioning properties.
    let properties = transitionsByElement.get(eventTarget);
    if (!properties) {
      return;
    }

    properties.delete(e.propertyName);

    // If empty, remove transitioncancel event, and remove the element from the list of transitioning elements.
    if (properties.size === 0) {
      eventTarget.removeEventListener('transitioncancel', onTransitionEnd);
      transitionsByElement.delete(eventTarget);
    }

    // If no transitioning elements, call all of the queued callbacks.
    if (transitionsByElement.size === 0) {
      for (let cb of transitionCallbacks) {
        cb();
      }

      transitionCallbacks.clear();
    }
  };

  document.body.addEventListener('transitionrun', onTransitionStart);
  document.body.addEventListener('transitionend', onTransitionEnd);