What is mern stack development : MERN is one of several MEAN stack (MongoDB Express Angular Node) variants in which the traditional Angular.js frontend framework is replaced with React.js. MEVN (MongoDB, Express, Vue, Node) is another variant, and really any frontend JavaScript framework can work.
MERN is an acronym that stands for MongoDB, Express, React, and Node, the four key technologies that comprise the stack.
What is the MERN Stack?
MongoDB is a document storage system.
Express(.js) is a web framework written in Node.js.
React(.js) is a JavaScript framework that runs on the client side.
Node(.js) is the most popular JavaScript web server. The middle (application) tier is made up of Express and Node. Node.js is a popular and powerful JavaScript server platform, and Express.js is a server-side web framework. Regardless of which variant you choose, ME(RVA)N is the best way to work with JavaScript and JSON from start to finish.
How does the MERN stack work?
React.js Front End
The MERN stack’s top tier is React.js, a declarative JavaScript framework for creating dynamic client-side HTML applications. React allows you to create complex interfaces by connecting simple Components to data on your backend server and rendering them as HTML.
React’s strong suit is handling stateful, data-driven interfaces with minimal code and pain, and it has all the bells and whistles you’d expect from a modern web framework: great form support, error handling, events, lists, and more.
Express.js and Node.js Server Tier
The Express.js server-side framework, which runs inside a Node.js server, is the next level down. Express.js bills itself as a “fast, unopinionated, minimalist web framework for Node.js,” and it is. Express.js includes robust models for URL routing (which matches an incoming URL with a server function) and handling HTTP requests and responses.
You can connect to Express.js functions that power your application by sending XML HTTP Requests (XHRs), GETs, or POSTs from your React.js front-end. These functions, in turn, use MongoDB’s Node.js drivers to access and update data in your MongoDB database, either via callbacks or Promises.
MongoDB Database Tier
What is mern stack development If your application stores data (user profiles, content, comments, uploads, events, and so on), you’ll need a database that’s as simple to use as React, Express, and Node.
That’s where MongoDB comes in: JSON documents generated by your React.js front end can be sent to the Express.js server, where they can be processed and (if valid) stored directly in MongoDB for later retrieval. Again, if you’re building in the cloud, Atlas is a good place to start. Continue reading if you want to set up your own MERN stack!
