Yes, MERN is a full stack, following the traditional three-tier architectural pattern, including the front-end display tier (React.js), application tier (Express.js and Node.js), and database tier (MongoDB). If you’re looking to set up your own MERN stack, read on! Is MERN a full-stack solution? Again, if you’re building in the cloud, you’ll want to look at Atlas. That’s where MongoDB comes in: JSON documents created in your React.js front end can be sent to the Express.js server, where they can be processed and (assuming they’re valid) stored directly in MongoDB for later retrieval. If your application stores any data (user profiles, content, comments, uploads, events, etc.), then you’re going to want a database that’s just as easy to work with as React, Express, and Node. Those functions, in turn, use MongoDB’s Node.js drivers, either via callbacks or using promises, to access and update data in your MongoDB database. Express.js has powerful models for URL routing (matching an incoming URL with a server function), and handling HTTP requests and responses.īy making XML HTTP Requests (XHRs) or GETs or POSTs from your React.js front end, you can connect to Express.js functions that power your application. Express.js bills itself as a “fast, unopinionated, minimalist web framework for Node.js,” and that is indeed exactly what it is. The next level down is the Express.js server-side framework, running inside a Node.js server. React’s strong suit is handling stateful, data-driven interfaces with minimal code and minimal pain, and it has all the bells and whistles you’d expect from a modern web framework: great support for forms, error handling, events, lists, and more. React lets you build up complex interfaces through simple components, connect them to data on your back-end server, and render them as HTML. The top tier of the MERN stack is React.js, the declarative JavaScript framework for creating dynamic client-side applications in HTML.
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