I'm using react-loadable v4.0.4 and webpack v3.5.1.

Here is my code,

import Dashboard from '../../scenes/dashboard/dashboard';    
import ReactLoadable from 'react-loadable';
...

const yoPath = 'src/ponents/scenes/dashboard/dashboard';

const DashboardWrap = ReactLoadable({
    loading: Dashboard,
    loader: () => {
        return new Promise((resolve, reject) =>
            require.ensure(
               [],
               (require) =>  resolve(require(yoPath)),
               (error) => reject(error),
               'dashboardChunk'
            )
         )
    }
});

And using react-router-dom v4.1.2, I've set Route as follows,

<Switch>
...
<Route exact path='/dashboard' ponent={DashboardWrap} />
...
</Switch>

I'm able to build the chunks for the respective ponent with the name dashboardChunk.

But while loading that ponent I'm getting the issues as follows.

In the console,

And the chunkfile,

Please let me know if I'm doing anything wrong.

I'm using react-loadable v4.0.4 and webpack v3.5.1.

Here is my code,

import Dashboard from '../../scenes/dashboard/dashboard';    
import ReactLoadable from 'react-loadable';
...

const yoPath = 'src/ponents/scenes/dashboard/dashboard';

const DashboardWrap = ReactLoadable({
    loading: Dashboard,
    loader: () => {
        return new Promise((resolve, reject) =>
            require.ensure(
               [],
               (require) =>  resolve(require(yoPath)),
               (error) => reject(error),
               'dashboardChunk'
            )
         )
    }
});

And using react-router-dom v4.1.2, I've set Route as follows,

<Switch>
...
<Route exact path='/dashboard' ponent={DashboardWrap} />
...
</Switch>

I'm able to build the chunks for the respective ponent with the name dashboardChunk.

But while loading that ponent I'm getting the issues as follows.

In the console,

And the chunkfile,

Please let me know if I'm doing anything wrong.

• javascript
• reactjs
• webpack
• code-splitting
• async-ponents

2 Answers 2

I basically wanted to do code splitting, for that I've just done the following and it works fine.

I've created a mon ponent(wrapper ponent) as follows,

import React, { Component } from 'react';

class Async extends Component {
    ponentWillMount = () => {
        this.props.load.then((Component) => {
            this.Component = Component
            this.forceUpdate();
        });
    }

    render = () => (
        this.Component ? <this.Component.default /> : null
    )
}

export default Async;

Then I've used above ponent as follows,

export const AniDemo = () => <Async load={import(/* webpackChunkName: "aniDemoChunk" */ "../../scenes/ani-demo/AniDemo.js")} />
export const Dashboard = () => <Async load={import(/* webpackChunkName: "dashboardChunk" */ "../../scenes/dashboard/Dashboard.js")} />

And using the above, I've made the changes in route as follows,

<Route exact path="/ani-demo" ponent={AniDemo} />
<Route exact path="/dashboard" ponent={Dashboard} />

With the help of the above changes that I made, I'm able to create chunks properly with the names that I've mentioned in the ments inside import statements ie aniDemoChunk.js and dashboardChunk.js respectively.

And these chunks load only when the respective ponent is called ie aniDemoChunk.js is loaded on browser only when AniDemo ponent is called or requested. Similarly for the Dashboard ponent respectively.

Note: If anyone is getting error re:Unexpected token import. So to support import() syntax just replace import to System.import() or else use babel-plugin-syntax-dynamic-import.

Webpack must be able to determine the imported path during static analysis. If you pass an argument into require, this is not possible.

It is best to put the actual path into require.ensure, i.e.

require.ensure(
  ['src/ponents/scenes/dashboard/dashboard']
  require => 
  resolve(require('src/ponents/scenes/dashboard/dashboard').default)
  error => reject(error),
  'dashboardChunk'
)

or use the newer dynamic import syntax. With the newer syntax you could simplify the above into:

Loadable({ 
  loader: () => import(/* webpackChunkName: "dashboardChunk" */ 'src/ponents/scenes/dashboard/dashboard')
  loading: MyLoader
})

Also, the loading argument should be a ponent to display while your asynchronous load is taking place, e.g. some kind of loading animation.