React 可以直接这么些？

Question

import React from 'react'
import { render } from 'react-dom'
import { Router, Route, IndexRoute, Link, IndexLink, browserHistory } from 'react-router'

import withExampleBasename from '../withExampleBasename'

const ACTIVE = { color: 'red' }

//***************  React 中可以直接这么写？ ********************
const App = ({ children }) => (
  <div>
    <h1>APP!</h1>
    <ul>
      <li><Link      to="/"           activeStyle={ACTIVE}>/</Link></li>
      <li><IndexLink to="/"           activeStyle={ACTIVE}>/ IndexLink</IndexLink></li>

      <li><Link      to="/users"      activeStyle={ACTIVE}>/users</Link></li>
      <li><IndexLink to="/users"      activeStyle={ACTIVE}>/users IndexLink</IndexLink></li>

      <li><Link      to="/users/ryan" activeStyle={ACTIVE}>/users/ryan</Link></li>
      <li><Link      to={{ pathname: '/users/ryan', query: { foo: 'bar' } }}
                                      activeStyle={ACTIVE}>/users/ryan?foo=bar</Link></li>

      <li><Link      to="/about"      activeStyle={ACTIVE}>/about</Link></li>
    </ul>

    {children}
  </div>
)

Answer 1

Stateless Function

文档地址：Stateless Function

Answer 2

这不就是ES6里面的箭头函数嘛？