Extracted from https://github.com/facebook/react/issues/12643.

We're currently diff a host node in the complete phase even if it has bailed out in the begin phase. By itself, this just means we're doing a little bit more work than necessary. But it also has some observable effects. In particular, https://github.com/facebook/react/issues/13424 (which by itself would be very rare and probably not worth fixing) is made worse because we end up committing update to inputs from another component.

I have a fix for this in https://github.com/facebook/react/pull/13423. Filing this for posterity.
const container = ReactNoop.getOrCreateRootContainer(rootID, isAsync);
      const root = roots.get(container.rootID);
      NoopRenderer.updateContainer(element, root, null, callback);
    },
    renderToRootWithID(
      element: React$Element<any>,
      rootID: string,
      callback: ?Function,
    ) {
      const isAsync = true;
      const container = ReactNoop.getOrCreateRootContainer(rootID, isAsync);
      const root = roots.get(container.rootID);
      NoopRenderer.updateContainer(element, root, null, callback);
    },
    unmountRootWithID(rootID: string) {
      const root = roots.get(rootID);
      if (root) {
        NoopRenderer.updateContainer(null, root, null, () => {
          roots.delete(rootID);
          rootContainers.delete(rootID);
        });
      }
    },
    findInstance(
      componentOrElement: Element | ?React$Component<any, any>,
    ): null | Instance | TextInstance {
      if (componentOrElement == null) {
        return null;
      }