A JavaScript server side rendering interface

1.0.0 2017-05-10 16:34 UTC


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A JavaScript server side rendering interface

Bracoa provides a simple interface for JavaScript server side rendering in PHP.



composer require koriym/baracoa


In a JS renderer application, implement render function which takes parameter(s) and return html string.

const render = state => (
  `Hello ${state.name}`

Call the render() method with JS app name and values to assign to redner.

$baracoa = new Baracoa($jsDir, new ExceptionHandler());
$html = $baracoa->render('min', ['name' => 'World']);
echo $html; // Hello World

In this example, you need to place min.bundle.js JS file in $jsDir directory. Every page needs own JS view application which is bundled single file by bundler tool like webpack.

Typical entry file is like following code.

import render from './render';
global.render = render;

In next section we see the example of Redux with React applicaiton example.

Redux React

The Server Side

Inject an initial component HTML and initial state into a template to be rendered on the client side. To pass along the state, we add a <script> tag that will attach preloadedState to window.__PRELOADED_STATE__. The preloadedState will then be available on the client side by accessing window.__PRELOADED_STATE__.

We also include our bundle file for the client-side application via a <script> tag. This is whatever output your bundling tool provides for your client entry point.


import React from 'react';
import { renderToString } from 'react-dom/server';
import { Provider } from 'react-redux';
import escape from 'escape-html';
import serialize from 'serialize-javascript';
import App from '../containers/App';
import configureStore from '../store/configureStore';

const render = (preloadedState, metas) => {
  const store = configureStore(preloadedState);
  const root = renderToString(
    <Provider store={store}>
      <App />
  return `<!doctype html>
        <div id="root">${root}</div>
          window.__PRELOADED_STATE__ = ${serialize(preloadedState)}
        <script src="/build/index.bundle.js"></script>

export default render;

render() method can pass second parameter as SSR meta data which is only available in server side rendering. Typically this value is used in <header> such as for OGP.

$meta = ['title => 'awesome page'];
$html = $baracoa->render('min', ['name' => 'World'], $meta);

The Client Side

We need to do is grab the initial state from window.__PRELOADED_STATE__ which is rendered in server side, and pass it to our createStore() function as the initial state.

import React from 'react';
import { render } from 'react-dom';
import { Provider } from 'react-redux';
import configureStore from '../store/configureStore';
import App from '../containers/App';

const preloadedState = window.__PRELOADED_STATE__;
const store = configureStore(preloadedState);

  <Provider store={store}>
    <App />

Performance boost

$cache = new FilesystemCache() // PSR-16
$baracoa = new CacheBaracoa($appBundleJsPath, new ExceptionHandler(), $cache);

An external "snapshot" is saved to increase performance in each app with CacheBaracoa. Highly recommended in production site. Consider internal snapshot for more performance.

See more detail in this blog post.

Run demo


git clone git@github.com:koriym/Koriym.Baracoa.git
cd Koriym.Baracoa
composer install
cd docs/example/min
php index.php
// HelloWorld


cd docs/example/handlesbar
yarn install
yarn run build
php public/index.php

// <!doctype html>
// ...

redux react

cd docs/example/redux
yarn install
yarn run build
yarn start

Install V8Js


brew update
brew install homebrew/php/php71-v8js

edit php.ini or add 'V8Js.ini'


JS UI Application Skeleton

UiSkeleton is a Javascript UI application skeleton with hot module loader, browsersync, test, lint and more for development.