How to Build a Compelling SPA Using Symfony and React JavaScript?


When three great things come together, they definitely create wonders!

No doubt how proficiently a SPA (Single Page Application) can be built by deciding to hire a React JS developer and a Symfony programmer together!

Still, confused?

Let’s understand it more clearly.

Why Build a SPA Using Symfony and ReactJS?

A SPA is a web app or website. It rewrites the existing web page with new data from the web server to interact with the web browser. Technically speaking, the content of a new page is served through JavaScript’s ability to manipulate the DOM elements on the existing web page rather than loading new HTML pages. SPAs are great with speed and responsiveness.

Where on the one hand, Symfony, based on PHP, is a lightweight and flexible framework with enough tooling and optional bundles to let you build any web application, ReactJS on the other is a JavaScript front-end library allowing you to develop and render components for a web page and ultimately lead to amazingly designed user interfaces.

With all such qualities, how can you not use this integration of SPA with Symfony and ReactJS?

There’s every valid reason to use these two for creating a single page application.

Let’s move ahead with the article not just to gather more valid reasons to do so but also the appropriate way to do it!

Detailed Overview

Before discussing how to develop a SPA, it is essential for you to know the platforms you’d be bringing to use for the same.


Symfony, developed by Fabien Potencier, came into existence in 2005.

As a set of PHP components, it has the ability to power multiple enterprise web apps.

This is the reason why it’s a relatively preferred choice for high-end web applications. It arrives with an elegant structure and all that is required to create any web app of any size or complexity. It also diminishes the need for coding again, along with providing a helping hand in building and maintaining web applications.

Advantages of Symfony:

  • Symfony has bundles and components that make it a highly flexible framework.
  • By reusing the bundles and some absence of strict dependencies, testing is more comfortable.
  • With Symfony, you get to avail a long-term support
  • One of the most significant advantages is well-written and structured documentation.
  • Reliability with Symfony is a bit greater than other frameworks.


ReactJS by Facebook is immensely popular and preferable among developers worldwide for enabling the development of an excellent front-end logic of a web application. With ReactJS, you get to experience a smooth effort to create a creative user interface and easily manage your application’s state. The ReactJS components open the doors for reusing codes and enrich your application with an organized and modularized structure. You can hire a React.JS developer to avail of all these amazing features of this incredible JavaScript library.

Advantages of ReactJS

  • ReactJS offers a simple JS design using a syntax integrated with HTML and JavaScript.
  • It provides its users with access to excellent documentation. 
  • The performance becomes a lot faster with Virtual DOM implementation and rendering optimizations.
  • Reusing codes, creating a modularized design, etc. is possible with ReactJS.
  • Building and scaling complex infrastructure turns into a more manageable action.

Combination of Symfony and ReactJS Together

Do you remember the time a few years back from now when there were not many traces of ReactJS, and front-end logic handling of any web application had different means such as JavaScript or JQuery to get carried out?

While it is a story of back then and is still used in some places, the web apps in today’s time are relatively more extensive and complex than they were before.

And considering the same, i.e., the difference, there is a need for a well structured, intuitive, and robust library to lessen the time and effort taken to write a vast number of codes and get the work done instantly.

At the same time, since PHP is a server-side scripting language, its framework as well is expected to have support for easy integration of JavaScript libraries with the back-end.

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The launch of Symfony Webpack Encore, a pure-JavaScript library, changed the game. It made working with CSS and JavaScript in a Symfony application a lot simpler and convenient. Symfony also shares great support from its community.

Now, these features of these two can help plenty with the development of a single page application. You can, with various steps, combine ReactJS and Symfony into a single project effectively and successfully.

Let’s take a glance at how to do it:

Remember that Symfony, in this case, may perform a little differently from how it performs traditionally. You can use React Router for a significant portion of actions such as routing and management of the application’s state, etc.

To retrieve the users’ list, you can build a back-end API with dummy data by making use of Symfony. And to get the list of posts, you can perhaps use a fake online REST API for testing and prototyping.

Here’s a brief of what you need to do to set up the Symfony application:

  • Scaffold the Symfony application and start it
  • Build a DefaultController
  • Obtain the list of users

Coming on to the ReactJS, you need to:

  • Build the front-end app with ReactJS
  • Configure the Webpack Encore
  • Build ReactJS components
  • Update the AppComponent
  • Add a stylesheet
  • Create the HomeComponent
  • Fetch the list of users from the back-end API previously created
  • Get the list of posts with the code
  • Update the Base Template

Now you can finally run your Symfony and ReactJS application to test its functionality.

The Final Thoughts

The excellence of a single page application or web application is commendable. All that is left to do is hire dedicated React JS Developers and Symfony programmers to get on board finally.

Power the back-end of your app with Symfony and front-end with ReactJS, and you would love how fantastic the outcome turns out to be!


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