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ReactJS is a popular framework that brought a revolution in the world of web development. A few years ago, the user needs to refresh the web page to check any new message or updated information, but now web pages are refreshed automatically after a certain period of time.
Even through pop-up notifications, you may know about any recent changes or updates on the web page. Do you know how is it happening, well this all magic is just due to ReactJS? In this blog, we are going to introduce ReactJS and its various functionalities and why you should use React?
Web pages can receive data from any source like real-time data, user input data, or initial data that can be dispatched by any dispatcher. After fetching data, it is usually forwarded to the store that transfers it to view. Through view, you or any other user can interact with the web application, so web pages come in view category of MVC architecture.
Do you know that in this traditional approach every time new data is added at the back end? At the time when the browser gets updates only then the user can see the new data on the view. This complete update cycle is handled by DOM or Document Object Model that is created by the browser when the web page is loaded or refreshed and it can dynamically add or remove data to and from the web page. Though Dom creation is done dynamically, this is memory wastage and degrades the overall application performance too.
As the Dom creation process was costly and inefficient, so a new technology was needed to save time and resources. ReactJS is proved such an efficient technology, that provides a new way to perform this task of handling views at the client side. Through ReactJS, a single application can be divided into many components, same traditional data flow technique is used in ReactJS, but at the back end, the way to handle data has been changed.
In ReactJS, when data gets the update it does not reload the full web page, instead, it reloads a portion of the web page and updates only selected component that was changed. Moreover, ReactJS uses virtual DOM instead of DOM to save the memory space.
Here, the use of component makes ReactJS an efficient library collection as they are easy to handle, one can change just a single component when it is required rather than changing the complete page layout. For real-time or large sized applications, this feature is quite important. In ReactJS, component states get changed when they are updated. As a result, the whole page need not be reloaded when the application gets changed.
Now it may become clear to you that what is ReactJS and why is it used. So, now let's look at its features, what are the intriguing features of ReactJS:
Just like real DOM, virtual DOM is also a node tree in which elements, their attributes, and content work as objects and properties. In React, a node tree is created by the render function in which all components of React are used. This tree gets updated as per the changes of components either by the user or system, this rotation is called mutation. Tree mutation is performed in these three simple steps:
These changes are applied to a certain part of the application, rather than complete application and so application becomes faster and less memory gets wasted.
ReactJS makes an application testable and it is easy to debug and test. It uses views that can be used as the states of the functions. Component states can be easily manipulated and passed to the ReactJS view, where the action, function, and event can be easily checked and tested. ReactJS has improved application quality by providing feature rich libraries.
In ReactJS, uni-directional data flow is used that is also called data binding. Here, application states are kept in specific stores and therefore rest of the components remain loosely coupled and as a result application becomes more flexible and efficient.
However, anyone who has a little bit knowledge of HTML, but still it is good to know the basic building blocks of ReactJS so that you can design and use the application as per your requirements. ReactJS treats everything as a component that may have certain specific props, state, and lifecycle and so on. So, in short, we can say that ReactJS has following building blocks:
Final Words With this blog, we know what is ReactJS and a complete comprehensive tutorial guide for beginners. Hence, we can say that ReactJS is a library that has many features. These libraries can be used to define the application in a simpler way. ReactJS has many features and one of the most used and compelling ones is its component-based architecture. It makes application easy to debug and test as well.
Read More: Reactjs Interview Questions
With this ReactJS Tutorial guide for beginners, you will not only have a basic idea of the framework but you can implement the same in real-life projects too. For a detailed guide, you should join JanBask Training certification programs now and start excelling in your career right away.
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