How to include install any library in node js application program

Question

Being early stage learner of Node.js I want to know how to include/install libraries in Node.js using Both ES5 and ES6.

Answer 1

Node.js is server side runtime environment that lets us use JavaScript for development of backend applications

• Module is the only way to install any library in Node.js application
• Basically module in Node.js is a functionality which is organised in a single or multiple JavaScript file and can be reused throughout the Node.js application
• There are 3 categories of modules:

1. Core modules: They are in-built and you can use them without any installation
2. User defined modules: They are created by you and you can reuse them in rest of your application
3. Node Package Manager: These include a group of Modules or packages, developed by other developers, which can be used in your application by installing them

• We usually include/install a library(module) using following syntax:

1.  ES5: var module = require('module_name')
2.  ES6: import {module} from ‘module_name’

• The require() function mentioned here returns an object, function, property or any other JavaScript type, depending on what is mentioned in module

I hope this clears your doubt:)

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