What is MERN Stack
This stack technology is mainly designed to make the process of development much easier and smoother. All of these four stack technologies offer an end-to-end framework to the engineers to work in, and all of these technologies play a vital role in the creation of web applications.
Working of the MERN Stack
The most important part of React.js is managing data-driven and stateful interfaces with minimal pain and code, and it includes all the essential features that you can see in an advanced web framework. It includes features like error handling, excellent support for forms, lists, events, and more.
Node.js and Express.js Server Layer
The next layer is called the Express.js server-based framework, which functions inside a Node server. Express.js is mainly known as a quick, minimalist, and unopinionated web framework for Node.js. It includes powerful models that are used for URL routing and managing HTTP responses and requests.
MongoDB Database Layer
If your web application contains any data like, comments, content, user profiles, events, uploads, etc., then you will surely need a database that can easily function with Node, Express, and React.
In such a case, you will need MongoDB. JSON documents that you have created in your React front end can be delivered to the Express.js server, from where they will be completely processed and stored directly into the MongoDB database for future retrieval.