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  Node.js What is Node.js? Node.js used as back-end (server-side) language in the development. As usual client/user deal with the front end of the applications.There are much process behind that , we call it as back-end.There, we used several languages like Node.js, php and java as server side languages and MongoDB or MySQL as data base. Node.js is an open-source ,cross-platform javascript runtime environment and library for running web applications outside the client's browser.It is a server-side platform built on Google Chrome's javascript engine(V8 Engine).Node.js was developed by Ryan Dahi in 2009 and its latest version is v14.13.0. Node.js applications are written in javascript and can be run within the Node.js runtime on OS X,Microsoft Windows and Linux.                      Node.js = Runtime Environment + JavaScript Library. Reference ( Simplilearn youtube channel, Node.js documentation)
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Node Authentication

Authentication mean that identify users and provision of access of rights and contents depending on their ID.Node authentication is the technique used to ensure that the managing server and data collectors communicate with each other in a secure manner.Authentication can be categorized as follows 1.Session based 2.Token based 3.Password less What is session based authentication? User credentials such as user name or email and password are compared with the database where this data was stored.If they match, a session is initialized for the user with the fetched ID.
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API

API stands for Application Programming interface.API is an interface used by programs to interact with application,which mean that API allow the applications  to communicate with each other. Really API is not a database or server,API is the code that give the access point for the server.
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React.js

React is a one of the most popular javascript library for building user interfaces.React developed by facebook and maintained by facebook and individual developers.It is used for handling view layer of web and mobile apps.It encourages the creation of reusable UI components.People use react as V in MVC architecture.React provides the simpler programming model with good performance by separate us from DOM.
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ER Diagram

ER is a high level conceptual data base diagram.ER modeling helps us to create well designed data base with systematic analyzement. Thats why it is very important to practice er diagram before create a database. Actually ER Diagram explains the logical structure of database.Even though ER diagram is similar to the flowchart it become unique because of its symbols and conceptual based exposes.
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Node.js MongoDB

Now a days all web based application has some database to store the data at the back end. Nodejs frame work have the ability to work with both relational and non relational database. Node.js  MongoDB   NoSQL database mongodb quite fame because of its ability to store the any sort of data at any format.In order work we have to download required module.Mongodb required the module to be installed is mongoose.And also with these modules we can perform many operations.Before that we have to get start mongodb in nodejs. 1.Install MongoDB Driver * We can download from official mongodb driver or open in terminal and execute it     npm install mongodb * Node.js used this module to manipulate mongodb database.   var  mongo = require( 'mongodb' ); 2.Node.js  MongoDB  Create Database To create a database: 1.Create the Mongoclient object 2.Specify the url connection (correct ip address and name of the database want...
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Node.js

Node JS is a runtime environment for executing JS code.It is great for prototyping and agile development.Mainly node js  used  to create web servers.Node js is an open source and cross platform.Node js built on the fastest JS engine of google chrome namely V8. Here I want to share something related to my previous point Actually JavaScript code can only execute in browser.It means something that happened inside the browser to execute.Yes really every browser has a js machine to convert the JS code TO machine code. Microsoft explorer - Chakara Firefox - Spider monkey Google chrome - V8    and also because of this process javascript code shown different output in different browser. Outstanding because of its features 1.Fast 2.Simple 3.A huge number of libraries 4.Asynchronously programming, 5.Highly scalable continue with each chapter
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