Due to its single-threaded nature, Node.js is best suited for non-blocking, event-driven servers. It was built with real-time, push-based architectures in mind and is utilised for standard web sites and back-end API applications. It is not only effective at what it does, but it is also popular. It also has a low tendency to cause serious compatibility issues between versions.
In today's world, Node.js offers a variety of purposes. Node.js may be used to create a wide range of apps, from backend management for social media marketing to single-page applications. A few examples are chat streaming, data streaming, and IoT applications. It is used in developing applications of the most used apps too. Amazon, eBay, Reddit, Netflix, LinkedIn, Tumblr, and PayPal are just a few of the organizations that have implemented Node.js.
In the video below, Nehru Permulla demonstrates how to instal Node.js.
Modules are encapsulated code blocks in Node.js that communicate with an external application based on their relevant functionality. Modules might be a single file or a group of files and folders. Because of its reusability and ability to break down a difficult piece of code into manageable bits, programmers are heavily reliant on modules.
Node.js includes three types of modules:
Third Party Modules
Core Modules: Node.js is a really lightweight framework. Its basic minimal functionalities are included in the core components. These core modules are compiled into the Node.js binary distribution and loaded when the process starts. However, before you can utilise the core module in your application, you must first import it.
Core modules include http, assert, fs, path, process, os, query string, and url.
Local Modules: In a Node.js application, local modules are built locally. These modules split the application's many functionalities into independent files and folders. It can also be packaged and distributed via NPM for usage by the Node.js community.
Third Party Modules: Third-party modules are modules that can be downloaded via the Node Package Manager website (NPM). These modules can be installed locally or globally in the project folder. Mongoose, express, angular, and react are some of the most popular third-party modules.
HTTP Requests Using Node.js
The request method is included in Node's http module. This module takes over much of the low-level operations like creating servers, receiving requests, sending responses, and keeping connections open. The request implementation, like most fundamental implementations, is more verbose and difficult to deal with than many libraries' abstractions.
The following video is a tutorial for learning HTTP Requests with Node.js for beginners.
Working With Express and Node
Learn to work with express and node with Newton School Launchpad in the video below
Intro To MongoDB
Database: It's a container to hold a bunch of collections.
Collection: It consists of a number of documents. A table in a SQL database is analogous to this. A collection, unlike a SQL database, does not have a predefined structure or data types.
Documents: It can be defined as a JSON-like object. This is equivalent to a SQL database row. A JSON object can also have child objects, an array, and other data.
_id: Every document must have an id field that is unique. It distinguishes one document from another, allowing us to recognise each one separately. If you don't give a value for this field, MongoDB will assign a random value to it.
CRUD Operations Using Mongoose
CRUD stands for Create, Read, Update and Delete. The data stored in MongoDB can be operated using CRUD. Mongoose is a package that acts as a bridge between the NodeJS application and the MongoDB database server. It's an Object Document Mapper (ODM) that lets us create objects with a strongly-typed schema and map them to MongoDB documents. All CRUD operations are supported by Mongoose.
Learn how to implement CRUD from an expert in the video below
Learn Node.Js with the industry expert Nehru Perumalla, a tech enthusiast and a software engineer at Value Momentum. All you have to do is enroll in Newton School Launchpad for FREE. Learn Node.js by working on exciting projects and get a certificate at the end of the course. Join Newton School now to be a rockstar developer!