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react-lazy-imports

v1.1.0

Published

A dynamic bundles splliting helper for react/webpack applications.

Downloads

2

Readme

React Lazy Imports helper

Abstract

This tiny library made to support System.import and require.insure operations in ReactJS based applications with Webpack bundler involved.

For now, it supports the following cases:

  • While the application is initially loaded.
  • While some route has to get a separate bundle and be loaded on demand.
  • While some route has to get a separate bundle and be loaded "behind the scene".

Installation

npm i -S react-lazy-imports

Examples

  • Splash screen index.jsx
// All of the imported above here will be included in the main,
// initially loading, bundle. Other parts will be moved
// out to a lazy-loading, dynamic bundle.
import React from 'react';
import { render } from 'react-dom';

import { LazyCall } from 'react-lazy-imports';

// The only custom layout which acts as a "splash-screen"
// till the whole application loaded. It's a good idea to make
// it as simple as possible.
import Splash from './pages/InitialLayout.page'

LazyCall(System.import('./app'))

render(
    <Splash/>,
    document.getElementById('root')
)
  • Dinamic routing routes.jsx
import React from 'react';
import { Router, Redirect } from 'react-router';
import { browserHistory } from 'react-router';

import { LazyRoute, RouteOnDemand } from 'react-lazy-imports';

import App from './App';

const routes = {
  component: App,
  childRoutes: [
    {
      path: '/',

      // This route will be loaded only if it'll be required.
      getComponent: RouteOnDemand(System.import('./Home'))
    },
    {
      path: 'about',

      // This route will be loaded just after the initial 
      // part of the application, "behinde the scene".
      getComponent: LazyRoute(System.import('./About'))
    },
    {
      path: '*',
      onEnter: (nextState, replaceState) => replaceState(
        { nextPathname: nextState.location.pathname }, 
        '/'
      )
    }
  ]
};

export default () => <Router history={browserHistory} routes={routes} />;