reddit-class-components.js

// src/components/Posts.js

import React from 'react';
import PropTypes from 'prop-types';

class Posts extends React.Component {
  render(){
    const { posts } = this.props;

    return (
      <ul>
        {posts.map(({ id, title }) => <li key={id}>{title}</li>)}
      </ul>
    )
  }
}


Posts.propTypes = {
  posts: PropTypes.arrayOf(PropTypes.shape({
    id: PropTypes.string.isRequired,
    title: PropTypes.string.isRequired,
  })).isRequired,
};

export default Posts;