React is a JavaScript user interface construction library that works well for:
Developing web apps with dynamic and complicated user interfaces.
creating reusable UI elements that may be used in other applications.
creating single-page applications with dynamic content updates that don't require a page reload.
The Virtual DOM's effective updating mechanism allows it to handle large volumes of data updates.
React, on the other hand, might be less suitable for:
Websites that are simple, stagnant, and have no interaction. Other libraries or simple HTML, CSS, and JavaScript may be a better fit in such circumstances.
Web sockets may be a better choice for applications that need real-time updates, such as chat or gaming apps.
When creating mobile apps, React Native is a better option.
Server side rendering only, as React is designed to run on the client side.
Any small project which you want to have ready in a couple of hours would be probably a bad candidate for using Symfony. Even the most seasoned senior developer can easily spend hours or days creating a small MVP with Symfony. While Symfony's learning curve isn't necessarily bad and will depend a lot on the architectural knowledge of the developer itself, because of the modularity required by Symfony you will need to spend a significant amount of time coding. If you are looking for a quick project, perhaps this framework isn't the best solution. Robust applications can benefit from Symfony's architecture. I have participated in projects on different industries including lead generation, marketing and even some micro-services for other industries which use Symfony. Because of how thorough the framework has been architected, you will have a reliable solution.
Yii is very well suited if you love to program with Object Oriented PHP. This framework uses OOP very well and if you know this pattern you'll love it. The same applies for its MVC architecture and if you come from formal software development education. Also if you are in a bussiness enviroment and need a stable framework. This is the tool for you. It uses very formal scheme but I would like more open and hackable framework, and for this Yii2 is not a good option. Also, if you like to have bleeding edge technologies I don't recommend this framework.
React is fantastic for building performant user interfaces. Our web app is snappy and great for our customers.
React has the philosophy of doing one thing and doing it well which is the view layer of the application. This makes it incredibly intuitive and flexible for developers to use.
React has lead the way in being able to write modular and structured code. It is a drastic improvement since the days of spaghetti jQuery code.
React has an unmatched community. The amount of tools and libraries available is fantastic, and there plenty of solutions available online for common problems.
Sonata Admin for Symfony is very versatile and we've used it for both the admin part of our website (even created a landing page constructor using it) and for the ERP system we've developed for inside use.
It is easy to learn if you know PHP and the community is quite large so you can easily find experts to help you with issues.
It's good for high-load projects. We have used it for the back-end of a custom affiliate marketing system that currently processes over 180 million requests per day.
Debugging React is challenging. Bugs in react code generate stack traces internal to React and it is often totally unclear how it relates to the code you actually wrote.
Relating your React elements to corresponding DOM elements is difficult. The intentional separation of virtual and actual DOM also makes it difficult to map the elements to the structures in the DOM. This is partially ameliorated by the use of the React dev tool, which provides a DOM-like view of the React elements, but the tool still does not provide a direct correspondence with the DOM that is often necessary to figure out why something isn't right.
Because JSX is React-specific and not a language feature, a special compilation process is necessary to convert JSX code to normal JS. Coming from a C++ background, compiling things doesn't bother me, but many JS developers are used to a less structured development.
React is just a bit of a different animal. I was avoiding it for the longest time. I thought for sure I would land on Vue or something else with a more approachable and familiar appearance. But after taking an online course in React, I started realize what people were raving about (and complaining about) and decided to implement it at our office for one of our products.
It can be a little complex at the begining comapred to some other frameworks, but this gives very good structure and makes it bulletproof for scaling actually large applications. The framework is built in a way that you can start simple and bring incremental improvements to make sure your app responds to traffic, demand, and growing usage.
I think is really easy to use, it's not perfect but many developers with great experience will know how to exploit this framework to create great apps!
Since it's open-source and very popular, the community support for React and related tools and libraries is excellent. There are a lot of people using the same tools, and so issues tend to get fixed quickly and "recipes" are easy to come by. And since it's backed by Facebook, they have a dedicated engineering team working on the progression of React.
There is a lot of community support but because Symfony is so flexible and unopinionated, there are too many ways to do things and if you lock yourself into one way, most of the advice online will not work for you.
It's has a really good support based on online documentation and official forums. But sometimes I wish there were a paid service where to report some urgent issues.
While this is a widely contested debate with various blog posts and benchmarks all over the place, its really a personal choice to determine what works for the team. Coming from a Angular 1.x background, I decided to try a new framework when Angular 2.x was announced and at that time React is gaining popularity and Vue hasn't taken off yet. Compared to Angular 1.x and Vue (hybrid of React and Angular) that split the logic from the html templates, I loved the way React breaks code into components using the jsx syntax. In my mind, this allows for cleaner components and easier maintenance
Symfony has become such a standard that many frameworks which previously may have been seen as competition, are actually adopting Symfony components to allow them to focus more on what makes their solution unique. Drupal 8 has replaced much of its low-level internal code with Symfony components. Laravel utilizes much from Symfony and builds on it. CakePHP was my preferred framework over Zend and CodeIgniter, but now I typically prefer Symfony or Laravel depending on the type of application and complexity of what I'm doing.
One negative thing to point out of Symfony is how painful it is to migrate legacy or relatively old projects from previous versions of Symfony into newer versions.
Symfony projects are usually reliable and provide the results you need.
Performance can be an issue sometime depending on the kind of project you are working on. Symfony can have some issues with cache.
