React is not a framework; it is mainly a concept, libraries, and principles that turn it into a fast, compact, and beautiful way to program your app on the client and server side as well, which is developed and used by Facebook.
Like every programming concept, React has its own solutions, tools, and libraries turning it into an ecosystem. In this ecosystem, you have to pick your own tools and build your own framework. You already know most of these tools, we will just connect them to each other. For example for dependencies we won't use any magic, rather Node's require and npm. It also provides different ways to organize your templates and gets you to think in components known as Component-driven development. In a React application, you should break down your site, page, or feature into smaller pieces of components. It means that your site will be built by a combination of different components. You can also reuse it somewhere else later. Think of it like the bricks of Lego.
In most of our Rails applications, we need technology that provides an easy way of developing rich encapsulated parts, scattered through different routes. In our opinion, React shines for this kind of job.
To track down model changes and apply them on the DOM, we have to be aware of two important things: when data has changed and which DOM element(s) to be updated supporting element creation, diff computation, and patch operations for efficient re-rendering.
React is also smart enough to recognize that the markup is already there (from the server) and will add only the event handlers on the client-side.
How to test React app:
1. Test React apps with Jest which is a test framework by Facebook and has many great features. 2. Pass the properties to our component, trigger the possible events and check the rendered output.
Cryptex Technologies make the best possible use of React technology for making better functionality app.