getComponent不呈现组件

Question

I try to set up dynamic routing with react-router and webpack. require.ensure function loads module, but getComponent method doesn't render component.

In my example Button component is rendered by default (on home page). When I click on the button, router redirects me to /admin url and I can see in my web console that require.ensure loaded new chunk, but Label component is not rendered.

index.jsx

import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import {Router, Route, useRouterHistory, browserHistory} from 'react-router';
import { createHashHistory } from 'history'
import Button from './components/button';

let appHistory = useRouterHistory(createHashHistory)({queryKey: false});

ReactDOM.render(
    <Router history={appHistory} onUpdate={() => window.scrollTo(0, 0)}>

    <Route path="/" component={Button} >
        <Route path="index" getComponent={(nextState, cb) => {
          require.ensure([], function (require) {
              cb(null, require('./components/button').default)
            })}}
        />
        <Route path="admin" getComponent={(nextState, cb) => {
          require.ensure([], function (require) {
              cb(null, require('./components/label').default)
            })}}
        />
    </Route>

    </Router>
    , document.getElementById('content')
);

button.jsx

var React = require('react');

var bootstrap = require('bootstrap');
var bootstrapStyle = require("bootstrap/dist/css/bootstrap.css");

export default class Button extends React.Component {

  constructor(props) {
        super(props);

        this.onRedirect = this.onRedirect.bind(this);
    }

  onRedirect(){
    this.context.router.push({
                pathname: `/admin`
            });
  }

  render() {
    return <button className="btn btn-info" type="button" onClick={this.onRedirect}>
      <span className="glyphicon glyphicon-refresh"></span>
    </button>;
  }
}

Button.contextTypes = {
    router: React.PropTypes.object
};

label.jsx

var React = require('react');

var bootstrap = require('bootstrap');
var bootstrapStyle = require("bootstrap/dist/css/bootstrap.css");

export default class Label extends React.Component {
  render() {
    return <span className="label label-default">Default</span>;
  }
}

package.json

"dependencies": {
    "babel": "^6.5.2",
    "babel-core": "^6.18.0",
    "babel-loader": "^6.2.7",
    "babel-preset-es2015": "^6.18.0",
    "babel-preset-react": "^6.16.0",
    "bootstrap": "^3.3.7",
    "css-loader": "^0.25.0",
    "file-loader": "^0.9.0",
    "history": "^2.0.1",
    "html-webpack-plugin": "^2.24.1",
    "http-server": "^0.9.0",
    "jquery": "^3.1.1",
    "less": "^2.7.1",
    "less-loader": "^2.2.3",
    "node-sass": "^3.10.1",
    "npm-install-webpack-plugin": "^4.0.4",
    "react": "^15.3.2",
    "react-dom": "^15.3.2",
    "react-router": "^3.0.0",
    "sass-loader": "^4.0.2",
    "style-loader": "^0.13.1",
    "url-loader": "^0.5.7",
    "webpack": "^1.13.3",
    "webpack-dev-server": "^1.16.2",
    "webpack-merge": "^0.15.0"
  }

Answer 1

I think you can't import your component on the fly like require('./components/label').default . You have to import your component:

import Label from './components/label';

then to code:

cb(null, Label);

source

Answer 2

Your issue isn't getComponent or dynamic routing but your route configuration. When navigating to /admin , react-router matches your top-level and admin routes and renders accordingly: <Button><Label /></Button> . Since Button doesn't render this.props.children , Label won't be rendered either.

By looking at your code, maybe this is the config you wanted:

<Route path="/" component={props => <div>{props.children}</div>}>
   <IndexRoute component={Button} />
   <Route path="index" />
   <Route path="admin" />
</Route>

You can read more about how components are rendered in the route configuration guide and the Route API .