我在应用程序中使用react-router，并且正在寻找一种方法来停止重新安装DOM中已经存在的组件。例如，如果我在URL
dashboard，那么我将有一个关联的DashboardComponent挂载。当我过渡到DOM时，dashboard/settings我DashboardComponent也SettingsComponent将其重新安装到DOM中。我想找到一种干净的方法来仅挂载当前URL的子级。这可以吗？

路由器：

import { Component, createFactory, PropTypes } from 'react'
import { Route, RouteHandler, DefaultRoute, NotFoundRoute } from 'react-router'

import Home from '../components/Home'
import Dashboard from '../components/Dashboard'
import ViewPlayers from '../components/clubs/ViewPlayers'

let route = createFactory(Route),
    handler = createFactory(RouteHandler),
    root = createFactory(DefaultRoute),
    pageNotFound = createFactory(NotFoundRoute),
    Transitions = createFactory(require('react/lib/ReactCSSTransitionGroup'));

class App extends Component {

    constructor() {

        super();
    }

    render() {

        return (
            Transitions({transitionName: 'fade'},
                handler({key: this.context.router.getCurrentPath()})
            )
        )
    }
}
App.contextTypes = {
    router: PropTypes.func
};

let Router = (
    route({path: '/', name: 'home', handler: App},
        root({handler: Home}),
        route({path: 'dashboard', name: 'dashboard', handler: Dashboard},
            route({path: 'players', name: 'players', handler: ViewPlayers}),
        )
    )
);
export { Router };

仪表板（父组件）：

import React from 'react'
import { RouteHandler, Link } from 'react-router'
import { _, div } from './Html'

export default
class Dashboard extends React.Component {

    constructor() {

        super();

        this.state = {}
    }

    componentWillMount() {

        console.log('mounted')
    }

    componentWillUnmount() {

    }

    render() {

        return (
            div({},
                _(Link)({to: 'players'}),
                _(RouteHandler)({})
            )
        )
    }
}

注意： _这只是React.createFactory（）的包装