Function enqueueUpdate

dash/deps/react-dom@18.2.0.js:13497–13537

(fiber, update, lane)

    return update;
  }
  function enqueueUpdate(fiber, update, lane) {
    var updateQueue = fiber.updateQueue;

    if (updateQueue === null) {
      // Only occurs if the fiber has been unmounted.
      return null;
    }

    var sharedQueue = updateQueue.shared;

    {
      if (currentlyProcessingQueue === sharedQueue && !didWarnUpdateInsideUpdate) {
        error('An update (setState, replaceState, or forceUpdate) was scheduled ' + 'from inside an update function. Update functions should be pure, ' + 'with zero side-effects. Consider using componentDidUpdate or a ' + 'callback.');

        didWarnUpdateInsideUpdate = true;
      }
    }

    if (isUnsafeClassRenderPhaseUpdate()) {
      // This is an unsafe render phase update. Add directly to the update
      // queue so we can process it immediately during the current render.
      var pending = sharedQueue.pending;

      if (pending === null) {
        // This is the first update. Create a circular list.
        update.next = update;
      } else {
        update.next = pending.next;
        pending.next = update;
      }

      sharedQueue.pending = update; // Update the childLanes even though we're most likely already rendering
      // this fiber. This is for backwards compatibility in the case where you
      // update a different component during render phase than the one that is
      // currently renderings (a pattern that is accompanied by a warning).

      return unsafe_markUpdateLaneFromFiberToRoot(fiber, lane);
    } else {
      return enqueueConcurrentClassUpdate(fiber, sharedQueue, update, lane);
    }
  }
  function entangleTransitions(root, fiber, lane) {
    var updateQueue = fiber.updateQueue;