javascript - 如何将类组件转换为函数无状态组件？

Question

我正在尝试将类组件转换为函数组件。但这对我来说有点困难。你可以帮帮我吗？

我尝试过这样做，但没有成功:

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
import MovieCardsList from './MovieCardsList';

function (
  props.profiles
  props.movies
  props.users
) {
 return (
      <div>
        <header className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <h1 className="App-title">ReactND - Coding Practice</h1>
        </header>
        <h1>How Popular is Your Favorite Movie?</h1>
        <MovieCardsList profiles={profiles} movies={movies} users={users} />
      </div>
    ); 
  }

export default App;

这里是部分代码:

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
import MovieCardsList from './MovieCardsList';

class App extends Component {
  render() {
    return (
      <div>
        <header className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <h1 className="App-title">ReactND - Coding Practice</h1>
        </header>
        <h1>How Popular is Your Favorite Movie?</h1>
        <MovieCardsList profiles={profiles} movies={movies} users={users} />
      </div>
    );
  }
}

export default App;

我已经接近解决方案了吗？任何帮助，我很感激。提前致谢。

Answer 1

只需进行最小的更改:

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
import MovieCardsList from './MovieCardsList';

function App(props) {
   return (
      <div>
        <header className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <h1 className="App-title">ReactND - Coding Practice</h1>
        </header>
        <h1>How Popular is Your Favorite Movie?</h1>
        <MovieCardsList profiles={props.profiles} movies={props.movies} users={props.users} />
      </div>
    ); 
  }

export default App;

您还可以使用 {...props} 对象展开将它们设置在 MovieCardsList 上，或使用对象解构 ({ profile, movie, users }) 来替换 ( Prop )。我个人会如何做:

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
import MovieCardsList from './MovieCardsList';

export default ({ profiles, movies, users }) => (
  <div>
    <header className="App-header">
      <img src={logo} className="App-logo" alt="logo" />
      <h1 className="App-title">ReactND - Coding Practice</h1>
    </header>
    <h1>How Popular is Your Favorite Movie?</h1>
    <MovieCardsList profiles={profiles} movies={movies} users={users} />
  </div>
);