react 中文文档案例二 （头像时间）

import React from 'react';
import ReactDOM from 'react-dom';

function formatDate(date) {
    return date.toLocaleDateString();
}
   
const comment = {
    date: new Date(),
    text: 'I hope you enjoy learning React!',
    author: {
      name: 'Hello Kitty',
      avatarUrl: 'https://placekitten.com/g/64/64',
    },
};
  // 提取头像
function Avatar(props) {
    return (
      <img className="Avatar"
        src={props.user.avatarUrl}
        alt={props.user.name}
      />
  
    );
}
  // 提取用户信息
function UserInfo(props) {
    return (
      <div className="UserInfo">
        <Avatar user={props.user} />
        <div className="UserInfo-name">
          {props.user.name}
        </div>
      </div>
    );
}
function Comment(props) {
    return (
      <div className="Comment">
        <UserInfo user={props.author}/>
        <div className="Comment-text">{props.text}</div>
        <div className="Comment-date">
          {formatDate(props.date)}
        </div>
      </div>
    );
}
 
ReactDOM.render(
    <Comment
      date={comment.date}
      text={comment.text}
      author={comment.author}
    />,
    document.getElementById('root')
);