问React钩子陈旧状态

EN

import React, { Component, useState } from 'react';
import { render } from 'react-dom';

function App() {
  const [state, setState] = useState({value: 0});
  const click = async () => {

    setTimeout(() => setState({value: state.value + 10}), 300);

    async function apiCall(state) {
      // fake it for now
      return new Promise((res) => {
        setTimeout(() => {
          // !the latest state here!
          res({value: state.value + 1});
        }, 1000)
      });
    }

    const newState = await apiCall(state);
    setState(newState);
  }
  return (
    <div>
      Value: {state.value}
      <button onClick={click}>Update</button>
    </div>
  );
}

render(<App />, document.getElementById('root'));