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Inertia.js Symfony Adapter

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This is a Inertia.js server-side adapter based on inertia-laravel, but for Symfony 5 and 6.

[!WARNING]

Looking for a new owner

As I don't work with Symfony or PHP anymore, I'm looking for someone who wants to take over the development of this project. As of now the project is unmaintained.

Installation

First, make sure you have the twig, encore and serializer recipe:

composer require twig encore symfony/serializer-pack

Install using Composer:

composer require rompetomp/inertia-bundle

yarn add @inertiajs/inertia

Setup root template

The first step to using Inertia is creating a root template. We recommend using app.html.twig. This template should include your assets, as well as the inertia(page) function

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    {% block stylesheets %}
        {{ encore_entry_link_tags('app') }}
    {% endblock %}
    {{ inertiaHead(page) }}
</head>
<body>
{{ inertia(page) }}
{% block javascripts %}
    {{ encore_entry_script_tags('app') }}
{% endblock %}
</body>
</html>

The inertia(page) function is a helper function for creating our base div. It includes a data-page attribute which contains the initial page information. This is what it looks like:

<div id="app" data-page="<?php echo htmlspecialchars(json_encode($page)); ?>"></div>

If you'd like a different root view, you can change it by creating a config/packages/rompetomp_inertia.yaml file and including this config:

rompetomp_inertia:
  root_view: 'name.html.twig'

Set up the frontend adapter

Find a frontend adapter that you wish to use here https://github.com/inertiajs. The README's are using Laravel's Webpack Mix. It's not hard translating this to Webpack Encore, just follow the documentation here: https://symfony.com/doc/current/frontend.html.

Webpack Encore Examples

For Vue:

yarn add @inertiajs/inertia-vue

const Encore = require('@symfony/webpack-encore')
const path = require('path')

if (!Encore.isRuntimeEnvironmentConfigured()) {
  Encore.configureRuntimeEnvironment(process.env.NODE_ENV || 'dev')
}

Encore
  .setOutputPath('public/build/')
  .setPublicPath('/build')
  .enableVueLoader()
  .addAliases({
    vue$: 'vue/dist/vue.runtime.esm.js',
    '@': path.resolve('assets/js')
  })
  .addEntry('app', './assets/js/app.js')
  .splitEntryChunks()
  .cleanupOutputBeforeBuild()
  .enableSourceMaps(!Encore.isProduction())
  .enableVersioning(Encore.isProduction())
  .disableSingleRuntimeChunk()
  .configureBabel(() => {}, {
    useBuiltIns: 'usage',
    corejs: 3
  })
  .enableSassLoader()

module.exports = Encore.getWebpackConfig()

//assets/app.js
import { createInertiaApp } from '@inertiajs/inertia-vue'
import Vue from "vue";

createInertiaApp({
    resolve: name => require(`./Pages/${name}`),
    setup({ el, app, props }) {
        new Vue({
            render: h => h(app, props),
        }).$mount(el)
    },
})

For React:

const Encore = require('@symfony/webpack-encore')
const path = require('path')

if (!Encore.isRuntimeEnvironmentConfigured()) {
  Encore.configureRuntimeEnvironment(process.env.NODE_ENV || 'dev')
}

Encore
  .setOutputPath('public/build/')
  .setPublicPath('/build')
  .enableReactPreset()
  .addAliases({
    '@': path.resolve('assets/js')
  })
  .addEntry('app', './assets/js/app.js')
  .splitEntryChunks()
  .cleanupOutputBeforeBuild()
  .enableSourceMaps(!Encore.isProduction())
  .enableVersioning(Encore.isProduction())
  .disableSingleRuntimeChunk()
  .configureBabel(() => {}, {
    useBuiltIns: 'usage',
    corejs: 3
  })
  .enableSassLoader()

module.exports = Encore.getWebpackConfig()

For Svelte:

const Encore = require('@symfony/webpack-encore')
const path = require('path')

if (!Encore.isRuntimeEnvironmentConfigured()) {
  Encore.configureRuntimeEnvironment(process.env.NODE_ENV || 'dev')
}

Encore
  .setOutputPath('public/build/')
  .setPublicPath('/build')
  .addLoader({
    test: /\.(svelte)$/,
    use: {
      loader: 'svelte-loader',
      options: {
        emitCss: true,
        hotReload: true,
      },
    },
  })
  .addAliases({
    '@': path.resolve('assets/js')
  })
  .addEntry('app', './assets/js/app.js')
  .splitEntryChunks()
  .cleanupOutputBeforeBuild()
  .enableSourceMaps(!Encore.isProduction())
  .enableVersioning(Encore.isProduction())
  .disableSingleRuntimeChunk()
  .configureBabel(() => {}, {
    useBuiltIns: 'usage',
    corejs: 3
  })
  .enableSassLoader()

const config = Encore.getWebpackConfig()
config.resolve.mainFields = ['svelte', 'browser', 'module', 'main']
config.resolve.extensions =  ['.wasm', '.mjs', '.js', '.json', '.jsx', '.vue', '.ts', '.tsx', '.svelte']

module.exports = config

Making Inertia responses

To make an Inertia response, inject the Rompetomp\InertiaBundle\Service\InertiaInterface $inertia typehint in your controller, and use the render function on that Service:

<?php
namespace App\Controller;

use Rompetomp\InertiaBundle\Service\InertiaInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

class DashboardController extends AbstractController
{
    public function index(InertiaInterface $inertia)
    {
        return $inertia->render('Dashboard', ['prop' => 'propValue']);
    }
}

Sharing data

To share data with all your components, use $inertia->share($key, $data). This can be done in an EventSubscriber:

<?php

namespace App\EventSubscriber;

use Rompetomp\InertiaBundle\Service\InertiaInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\KernelEvents;

class InertiaSubscriber implements EventSubscriberInterface
{
    /** @var \Rompetomp\InertiaBundle\Service\InertiaInterface */
    protected $inertia;

    /**
     * AppSubscriber constructor.
     *
     * @param \Rompetomp\InertiaBundle\Service\InertiaInterface $inertia
     */
    public function __construct(InertiaInterface $inertia)
    {
        $this->inertia = $inertia;
    }

    public static function getSubscribedEvents()
    {
        return [
            KernelEvents::CONTROLLER => 'onControllerEvent',
        ];
    }

    public function onControllerEvent($event)
    {
        $this->inertia->share(
            'Auth::user', 
            [
                'name' => 'Hannes', // Synchronously
                'posts' => function () {
                    return [1 => 'Post'];
                }   
            ]
        );
    }
}

View data

If you want to pass data to your root template, you can do that by passing a third parameter to the render function:

return $inertia->render('Dashboard', ['prop' => 'propValue'], ['title' => 'Page Title']);

You can also pass these with the function viewData, just like you would pass data to the share function:

$this->inertia->viewData('title', 'Page Title');

You can access this data in your layout file under the viewData variable.

Asset versioning

Like in Laravel, you can also pass a version to the Inertia services by calling

$inertia->version($version);

Lazy Prop

It's more efficient to use lazy data evaluation server-side you are using partial reloads.

To use lazy data you need to use Rompetomp\InertiaBundle\Service\Inertia::lazy

Sample usage:

<?php
namespace App\Controller;

use Rompetomp\InertiaBundle\Service\InertiaInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

class DashboardController extends AbstractController
{
    public function index(InertiaInterface $inertia)
    {
        return $inertia->render('Dashboard', [
            // using array
            'usingArray' => $inertia->lazy(['SomeClass', 'someMethod']),
            // using string
            'usingString' => $inertia->lazy('SomeClass::someMethod'),
            // using callable
            'usingCallable' => $inertia->lazy(function () { return [...]; }),
        ]);
    }
}

The lazy method can accept callable, array and string When using string or array, the service will try to check if it is existing service in container if not it will just proceed to call the function

Server-side rendering

For frontend configuration just follow the document https://inertiajs.com/server-side-rendering#setting-up-ssr

Setting up Encore / webpack

To run the webpack properly install webpack-node-externals

npm install webpack-node-externals

Next we will create a new file namely webpack.ssr.config.js this is almost the same with your webpack.config.js. Remember that you need to keep this both config.

touch webpack.ssr.mix.js

Here is an example file for webpack.ssr.config.js

const Encore = require('@symfony/webpack-encore')
const webpackNodeExternals = require('webpack-node-externals')
const path = require('path')

if (!Encore.isRuntimeEnvironmentConfigured()) {
    Encore.configureRuntimeEnvironment(process.env.NODE_ENV || 'dev')
}

Encore
    .setOutputPath('public/build-ssr/')
    .setPublicPath('/build-ssr')
    .enableVueLoader(() => {}, { version: 3 })
    .addEntry('ssr', './assets/ssr.js')
    .cleanupOutputBeforeBuild()
    .enableSourceMaps(!Encore.isProduction())
    .enableVersioning(Encore.isProduction())
    .enableSassLoader()

const config = Encore.getWebpackConfig();
config.target = 'node';
config.externals = [webpackNodeExternals()];

module.exports = config

Enabling SSR

To enable the ssr you need to add a configuration for your package config/packages/rompetomp_inertia.yaml file

rompetomp_inertia:
  ssr:
    enabled: true
    url: 'http://127.0.0.1:13714/render'

Building your application

You now have two build processes you need to run—one for your client-side bundle, and another for your server-side bundle:

encore build
encore build -- -c ./webpack.ssr.config.js

The build folder for the ssr will be located in public/build-ssr/ssr.js. You can change the path by changing the output path (setOutputPath) in your ./webpack.ssr.config.js

Running the Node.js Service

To run the ssr service you will need to run it via node.

node public/build-ssr/ssr.js

This will be available in http://127.0.0.1:13714 where this is the path we need to put in our ssr.url

Projects using this bundle