React Router 4，如何使用route或withRouter获得有效的匹配url？

Question

location对象正确。匹配url属性始终为'/‘

这是一个显示problem React Router 4 match woes的代码笔

const { render } = ReactDOM

    const {
      HashRouter,
      Route,
      Link
    } = ReactRouterDOM

    const App = () => (
      <HashRouter>
        <div>
          <AddressBar/>

          <ul>
            <li><Link to="/">Home</Link></li>
            <li><Link to="/about">About</Link></li>
            <li><Link to="/topics">Topics</Link></li>
          </ul>

          <hr/>

          <Route exact path="/" component={Home}/>
          <Route path="/about" component={About}/>
          <Route path="/topics" component={Topics}/>
        </div>
      </HashRouter>
    )

    const Home = () => (
      <div>
        <h2>Home</h2>
      </div>
    )

    const About = ({ match }) => (
      <div>
        <h2>About</h2>
        <h3>Match: {match.url}</h3>
      </div>
    )

    const Topics = ({ match }) => (
      <div>
        <h2>Topics</h2>
        <ul>
          <li><Link to={`${match.url}/rendering`}>Rendering with React</Link></li>
          <li><Link to={`${match.url}/components`}>Components</Link></li>
          <li><Link to={`${match.url}/props-v-state`}>Props v. State</Link></li>
        </ul>

        <Route path={`${match.url}/:topicId`} component={Topic}/>
        <Route exact path={match.url} render={() => (
          <h3>Please select a topic.</h3>
        )}/>
      </div>
    )

    const Topic = ({ match }) => (
      <div>
        <h3>{match.params.topicId}</h3>
        <h3>Match: {match.url}</h3>
      </div>
    )

    const AddressBar = () => (
      <Route render={({ location: { pathname }, match: {url}, goBack, goForward }) => (
        <div className="address-bar">
          <div>
            <button
              className="ab-button"
              onClick={goBack}
            >◀︎</button>
          </div>
          <div>
            <button
              className="ab-button"
              onClick={goForward}
            >▶</button>
          </div>
          <div className="url">URL: {pathname} Match: {url}</div>
        </div>

      )}/>
    )

    render(<App/>, document.getElementById('root'))

单击About链接(主题也有同样的问题)：请注意，使用路由渲染的AddressBar始终显示在顶部

> Match: /

Match: /about

我做错了什么？

let keys = []
let path = '/*/:league/:id';
if (this.path.split('/').length === 3)
  path = '/*/:league';
let re = pathToRegexp(path, keys);
const result = re.exec(this.path)
if (result && result[2])
  this.store.setLeague(result[2]);

Answer 1

如果我正确理解了您的问题，您希望能够使用React Router的匹配工具从URL中提取参数。这对我很有效

import { matchPath } from 'react-router'

const match = matchPath('/users/123', {
  path: '/users/:id',
  exact: true,
  strict: false
})

来源：https://github.com/ReactTraining/react-router/blob/master/packages/react-router/docs/api/matchPath.md

Answer 2

我想当你需要使用匹配的时候，你也需要把它和路径名结合起来

示例

var match = this.props.match;
<Link className = 'xxx' to = {{pathname:match.url + '/target'}}