👨‍💼 Great job! Now if you take some measurements with the dev tools, you'll notice that doing searches is much faster than before. Offloading this work is a nice improvement!

You may think this would be a case for useDeferredValue rather than useTransition. However, useTransition is better for this situation because the state we're changing is not the input value itself, but rather the matching cities which are being fetched from the web worker. The transition will preserve the existing UI (including the input we can still type in) while the new cities are being fetched.