Update an existing todo item in the database by sending an HTTP POST request.Create a new todo item in the database by sending an HTTP POST request.Retrieve a specific todo item by sending HTTP GET request and provide the specific todo ID in addtion.Retrieve the complete list of available todo items by sending an HTTP GET request.The back-end will comprise HTTP endpoints to cover the following use cases: When building the back-end we'll also be setting up MongoDB and connect to the database from our Node.js / Express server by using the Mongoose library. In this second part we'll be focusing on the back-end and build a server by using Node.js / Express. In the first part we've started to implement the front-end React application of the MERN stack todo application. Require("dotenv").This is the second part of the The MERN Stack Tutorial - Building A React CRUD Application From Start To Finish series. Start by creating a file called server.js and type the following code into it and save: const express = require("express") It should list the packages along with their versions. We can check out the installed dependencies using the package.json file. This lets you separate configuration files from the code. dotenv installs the module that loads environment variables from a.cors installs a Node.js package that allows cross origin resource sharing.express installs the web framework for Node.js.The command above uses a couple of keywords: Install the dependencies: > npm install express cors dotenv This file will contain some information about your app and the dependencies that it needs to run. Initialize a new Node.js project with the following code: > npm init -yĪ new package.json file will be created. Open a new terminal window and create a new Node project directory in any convenient location on your local machine and switch to that directory by executing the following code: > mkdir myProject & cd myProject With Node.js and MongoDB already installed, it’s time to create a project directory for your Node project. To install Node, go to and download either the LTS version or the current version. To get started, you will need to do the following: Step 1-Install Node We will call the front end client and the back end server. The front end will be implemented with React and the backend will be implemented with MongoDB, Node, and Express. For this project, we will create both a back end and a front end. So, to leverage its full potential, we will be creating a MERN stack project. MERN lets us create full-stack solutions. A few examples might be: Workflow management, news aggregation, to-do apps, calendars, interactive forums, or social products. Like any web stack, you can build whatever you want in MERN, though it’s ideally suited for cases that are JSON heavy, cloud-native, and that have dynamic web interfaces. Developers also report that coding in JavaScript delivers performance improvements. The standardization also gives organizations greater flexibility when it comes to hiring developers and grants the advantage of not having to switch contexts while writing client side and server side code. This combination means that JSON data flows naturally from front to back, making it fast to build on and reasonably simple to debug. The beauty of MERN is that it’s based on a standard development language-JavaScript-for both server-side and client-side execution. ![]() When you use the MERN stack, you work with React to implement the presentation layer, Express and Node to make up the middle or application layer, and MongoDB to create the database layer. Node.js, an execution environment for event-driven, server-side, and networking.Īs you can see, MERN is a full-stack JavaScript framework comprising a front-end, back-end, and database for storing the data. React.js, a popular JavaScript library that can be executed either in the browser or on the backend server within Node.js MongoDB, a document-oriented NoSQL database known for its scalability, rich queries, and auto-sharding.Įxpress.js, a Node.js web application framework that handles a lot of the HTTP logic out of the box. The MERN stack is a web development framework comprised of the following open-source components: How to Get Started with the MERN Stack?.This tutorial was verified with Node v14.2.0, npm v9.2.0, mongodb-community v4.4, express v4.18.2, and react 18.2.0, and mongoose v6.8.0. In this MERN stack tutorial, you will learn how to develop a full-stack MERN application with the most current tools available.īefore you begin, make sure that you are familiar with Node.js and React.js basics.
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