render.js

render() {
  const { posts, isBottomReached } = this.state;
  const postComponents = posts.map((post, i) => (
    <RedditPost key={post.id} post={post} order={i + 1} />
  ));

  return (
    <div className="App">
      {postComponents}
      {isBottomReached ? null : (
        <button className="loadMoreButton" onClick={this.loadMoreStories}>
          Load More Stories
        </button>
      )}
    </div>
  );
}