Function App

hook-test/src/App3.tsx:28–42

()

}

function App() {
  const [res, dispatch] = useReducer<Reducer<Data, Action>, string>(reducer, 'zero', (param) => {
    return {
        result: param === 'zero' ? 0 : 1
    }
  });

  return (
    <div>
        <div onClick={() => dispatch({ type: 'add', num: 2 })}>加</div>
        <div onClick={() => dispatch({ type: 'minus', num: 1 })}>减</div>
        <div>{res.result}</div>
    </div>
  );
}

export default App;