Inertia.js Symfony Adapter

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

Installation

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

composer require twig
composer require encore
composer require 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">
    <title>{% block title %}Welcome!{% endblock %}</title>
    {% block stylesheets %}
        {{ encore_entry_link_tags('app') }}
    {% endblock %}
</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.twig.html'

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);

Projects using this bundle

Ping CRM on Symfony - The official Inertia.js demo app, ported to Symfony

danielmarkavis/inertia-bundle