React 拥抱函数式编程

推荐使用 map() filter() reducer() 等函数组合 /链式编程, 而不是使用forEach()

React使用map来渲染列表,记得给列表项添加key标识

import React, { useState } from 'react';  const App() => {  const initialValue = [    "Star Wars", "Return of the Jedi", "Empire Strikes Back",  ]   const [ movies, setMovies ] = useState(initialValue);   return (    <>      {movies.map((movie) => {        return <div key={movie}>{movie}</div>;      })}    </>  ); }  export default App;

42:19