withRouter

React Router DOM 提供了一个withRouter()方法，用于向普通组件中注入 History 对象、Location 描述对象和路由路径 Match 描述对象。withRouter()会从距离被包装组件最近的路由组件中取得上述值供使用。使用withRouter()函数包装的组件会返回一个新的组件（高阶组件）。

import React from 'react';
import PropTypes from 'prop-types';
import { withRouter } from 'react-router';

class ShowTheLocation extends React.Component {
  render() {
    const { match, location, history } = this.props;

    return <div>You are now at {location.pathname}</div>;
  }
}

const ShowTheLocationWithRouter = withRouter(ShowTheLocation);