React Isomorphic Rendering Core Utility

Usage no npm install needed!

<script type="module">
  import reactIsomorphism from '';



This library provides elegant utilities for build react web page and renderer that can be used in both server side and client side, a.k.a. isomorphic rendering, and this library should be friendly with resource bundler like webpack and CDN.

This library is written in Typescript and ships with type definitions. You can also use it with plain Javascript, however, you need to take care of the module interoperability between ES6 and CommonJS.


npm i react-isomorphism react react-dom --save

react and react-dom are peer dependencies of this library. You may want to install @types/react and @types/react-dom as well if you also use Typescript.

Example Usage

The following steps show you how to use this library and integrate with webpack in Typescript.

  1. Setting up webpack

    var AssetsPlugin = require('assets-webpack-plugin');
    var webpack = require('webpack');
    module.exports = {
        entry: { home: './home-page.tsx' },
        output: {
            filename: './assets/[name].[chunkhash].js'
        resolve: {
            extensions: ['.js', '.ts', '.tsx', '.json']
        devtool: 'source-map',
        module: {
            loaders: [
                    test: /\.tsx?$/, loader: 'ts-loader'
                // ...
        plugins: [
            new AssetsPlugin({filename: './assets-map.json', prettyPrint: true, path: '.'}),

    This example webpack config file only contains one entry of home, usually you have to define more entries. The output filename are postfixed with chunck hash so it should be safe to enable long-term cache if you use a CDN.

    Note that assets-webpack-plugin is required to dump an assets map. So that we can find the correct bundle file by entry name.

  2. Define Your Page

    import Isomorphism from 'react-isomorphism';
    import * as React form 'react';
    export interface HomePageProperties {
        // ...
    interface HomePageState {
        // ...
    class HomePageComponent extends React.Component<HomePageProperties, HomePageState> {
        // ...
    export default Isomorphism.Builder('home', HomePageComponent)
       .appendInitAction(()=> require('style.css'))     // Stylesheet of this page
       .appendDomReadyAction(()=> require('analytics')) // Analytics scripts

    Here we define an isomorphic render target for you home page.

    Note that functions passed to appendInitAction and appendDomReadyAction are only be executed in browser side, before DOM is going to constructed and after DOM gets ready. We need to require them here so that they won't be actually required on server side while be able to be scanned and bundled by Webpack.

  3. Render it in your application

    Assume you put the above resources in a seperated module named example-web, and importing them in your server application.

    import Renderer from 'react-isomorphism/render'
    import HomeTemplate = require('example-web/home-page')
    import AssetsMap = require('example-web/assets-map');
    let renderer = new Renderer.Builder()
        .setAssetsUrlMap((x)=> AssetsMap[x].js)
    let html = render(HomeTemplate, {
        title: '',
        data: {

    Here we build a renderer and use it to render the home page.

    If you want to deliver the assets through CDN, you can transform the assets url in the function passed to setBundledAssetsUrlMap.


The ISC License