Question

// modules/NavLink.js
import React from 'react'
import { Link } from 'react-router'

export default React.createClass({
  render() {         
    //for example this.props={from: "home", to: "about"}
    return <Link {...this.props} activeClassName="active"/> // ???what does the statement compile to es5?
  }
})

// modules/App.js
import NavLink from './NavLink'

// ...

<li><NavLink to="/home">Home</NavLink></li>

问题如下：

<Link {...this.props} activeClassName="active"/>，如果this.props = {to：＆＃34; / home＆＃34;，children：＆＃34; Home＆＃34;}？

Answer 1

Straight from the Babel homepage：

React.createElement(Link, _extends({}, this.props, { activeClassName: "active" }));

我省略了_extends polyfill，如果可用，它基本上会解析为Object.assign。

Answer 2

<Link to="/home" children="Home" activeClassName="active"/>

esj对象传播运算符在jsx of reactjs

2 个答案: