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.
},
        commitUpdate(
          instance: Instance,
          updatePayload: Object,
          type: string,
          oldProps: Props,
          newProps: Props,
        ): void {
          if (oldProps === null) {
            throw new Error('Should have old props');
          }
          instance.prop = newProps.prop;
        },
        commitTextUpdate(
          textInstance: TextInstance,
          oldText: string,
          newText: string,
        ): void {
          textInstance.text = newText;
        },
        appendChild,
        appendChildToContainer,
        insertBefore,
        insertInContainerBefore,
        removeChild,
        removeChildFromContainer,
        resetTextContent(instance: Instance): void {},
      }
    : {
        ...sharedHostConfig,