reactjs - 从 CDN react 延迟导入

Question

我正在按照本指南使用 React Router 和 Suspense 进行延迟加载:

https://itnext.io/async-react-using-react-router-suspense-a86ade1176dc

这是我到目前为止的代码:

import React, { lazy, Suspense } from 'react';
import { Link, Route, BrowserRouter as Router, Switch } from 'react-router-dom';

const HomePage = (
  lazy(() => (
    import('./pages/HomePage')
  ))
);

const BookingsPage = (
  lazy(() => (
    import('./pages/BookingsPage')
  ))
);

const LoadingMessage = () => (
  <div>I'm loading...</div>
);

class AppProviders extends React.Component {
  constructor (props) {
    super(props);
  }

  render () {
    return <Router>
          <div>
            <ul>
              <li><Link to="/">Home</Link></li>
              <li><Link to="/bookings">Bookings</Link></li>
            </ul>
            <hr />
            <Suspense fallback={<LoadingMessage />}>
              <Switch>
                <Route exact path="/" component={HomePage} />
                <Route path="/bookings" component={BookingsPage} />
              </Switch>
            </Suspense>
          </div>
        </Router>
  }
};

export default AppProviders;

代码按预期拆分，但问题是页面(html)和js文件托管在不同的子域中，例如:

• 页面:http://www.myweb.com/
• js 文件:http://cdn.myweb.com/

当页面加载时，它会从 CDN 请求基本 js 文件:

• http://cdn.myweb.com/js/main.js

但是 main.js 从 www.myweb.com 请求其他 block :

• http://www.myweb.com/js/1.js
• http://www.myweb.com/js/2.js

返回 404。

有没有办法告诉 React 懒惰地从不同的子域请求文件(在本例中，它将是“cdn.myweb.com”而不是“www.myweb.com”)。 com'，其中托管 html 页面)。

提前致谢，请原谅我的英语不好。

Answer 1

解决方案是在webpack配置中:output.publicPath

https://webpack.js.org/configuration/output/#outputpublicpath :

This is an important option when using on-demand-loading or loading external resources like images, files, etc. If an incorrect value is specified you'll receive 404 errors while loading these resources.

同一页面中还提供了一个示例:

module.exports = {
  //...
  output: {
    path: path.resolve(__dirname, 'public/assets'),
    publicPath: 'https://cdn.example.com/assets/'
  }
};