4-+ const state = proxy({ dur: 4, count: 2 }); const incDur = () => {++state.dur}; const decDur = () => {--state.dur}; const incCount = () => { ++state.count; setTimeout(incCount, 100 * state.dur); }; incCount(); const snap = useSnapshot(state) return ( <div> <h3>{snap.dur}</h3> <button disabled={snap.dur <= 1} onClick={decDur}> - </button> <button disabled={snap.dur >= 10} onClick={incDur}> + </b