End user fills the form and submits required data for registration.React application(client layer) displays a registration form on a webpage.Let's walk through a scenario to understand the working of MERN stack applications. Finally the backend server(application layer) passes required data/web-pages to React application which renders the data on web-page for the clients. It determines what data/web-pages a client needs and makes request to database(database layer) for fetching this informtaion. These requests go to the application server which is the logical layer. In a full-stack MERN application, the client layer(React application) which is accessible by the end users makes request for web pages. All application data is stored in this mongoDB database.Database layer runs the mongoDB server.This layer accepts client's requests and serves them by fetching appropriate data from database layer.This application server acts as the bridge of communication between client & database layer.This is the business logic layer which is an Express application on top of Node.js platform.On this layer, end users tries to access the feature of our application.Client layer will be developed using React which combinedly uses Javascript, HTML & CSS.These are views(webpages) which is visible to the client.MERN Stack applictaions follows a 3 layer architecture pattern which is based on a typical MVC model. You can learn more about the concepts you need to learn before starting MERN here. Good understanding of HTML/CSS concepts.LAMP Stack (Linux, Apache, MySQL & PHP).MEVN Stack (Angular replaced by Vue.js).MEAN Stack (MongoDB, ExpressJS, AngularJS & Node).They may use languages other than Javascript. Here are 10 reasons why you should learn MERN stack. MongoDB as the database uses JSON(Javascript Object Notation) format to store and manage data which is standard nowadays for exchange of information in a full-stack application from client to server and vice-versa, and can be easily integrated in MERN Stack applications. You can create full stack applications, mobile applications using React native, desktop applications using Electron.js - All you need is JavaScript. Using Javascript for both front-end and back-end reduces the learning time and cost as you don't need to learn any other language for separate client and server side applications. Node.js hosts thousands of public/private packages via NPM to facilitate application development over multiple domains.Express.js framework is built on top of Node.js to facilitate web development.It is open-source, cross-platform which uses JavaScript(outside the browser) to create server side tools and applications.Node.js is the back-end layer which hosts the server created using JavaScript.It uses JavaScript on the frontend platforms like browser, mobile applications etc.It is fast, scalable and offers code reusability.It allows you to compose complex user interfaces from small and isolated, reusable pieces of code called components.React is declarative, efficient and flexible for building user interfaces.React is an open-source front-end JavaScript library designed by Facebook.You can use Model, View & Controller (MVC) pattern to create server-side applications.It uses Javascript on the server side to create fast and secure back-end applications.ExpressJS is open source, unopinionated, lightweight framework built on top of NodeJS.It is highly scalable and can be used to store large volumes of data.It is an open-source, NoSQL, document based database which stores data in the binary JSON format.MongoDB is the database layer for the full-stack application used to store and manage data.MERN stack laverages below frameworks/tools for creating full-stack applications:- 1. MERN is a technology stack used to develop a full-stack software application.Ī technology stack is basically a set of frameworks and tools which facilitate the development of an application. MongoDB, Express.js, React.js & Node.js What is MERN Stack ? This guide covers the what, why, and how, required to start the MERN stack development. MERN stack which is powered by Javascript, allows developers to create Full stack applications without the knowledge of any other programming language. It requires knowledge of different technologies. Full Stack web development is gaining traction in IT industry as it allows developers to create a full fledged application from creating a simple web page to making it live on the internet.
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