Node NPM Tutorial | What Is NPM And How It Works | NPM Tutorial For Beginners | Simplilearn

2. What’s in it for you? Node.js Modules

3. What’s in it for you? Node.js Modules What is NPM?

4. Click here to watch the video

5. What’s in it for you? Node.js Modules What is NPM? Why NPM?

6. What’s in it for you? Node.js Modules What is NPM? Why NPM? NPM Installation

7. What’s in it for you? Node.js Modules What is NPM? Why NPM? NPM Installation Package.json File

8. What’s in it for you? Node.js Modules What is NPM? Why NPM? DEMO NPM Installation Package.json File

9. Node.js Modules

10. Node.js Modules

11. Node.js Modules • Modules in Node.js provide functionality that can be used throughout the Node.js application • Node.js has many modules to provide required functionality for a web application

12. Node.js Modules • Some of the popular modules are: • Express

13. Node.js Modules • Some of the popular modules are: • express • React

14. Node.js Modules • Some of the popular modules are: • express • react • Nodemon

15. What is NPM?

16. What is NPM? • NPM stands for Node Package Manager

17. What is NPM? • NPM stands for Node Package Manager • NPM is responsible for managing all the packages and modules for Node.js

18. What is NPM? • Node Package Manager provides two main functionalities: • It provides online repositories for node.js packages/modules which are searchable on search.nodejs.org

19. What is NPM? • Node Package Manager provides two main functionalities: • It provides online repositories for node.js packages/modules which are searchable on search.nodejs.org • It also provides command line utility to install Node.js packages, does version management and dependency management of Node.js packages

20. Why NPM?

21. Why NPM? • Helps in adding the required packages into a project

22. Why NPM? • Helps in adding the required packages into a project • Manages and maintains various versions of codes and their dependencies

23. Why NPM? • Helps in adding the required packages into a project • Manages and maintains various versions of codes and their dependencies • NPM automatically updates the application when the project code undergoes any change

24. NPM Installation

25. NPM Installation • Node Package Manager is included with the installation of Node.js

26. NPM Installation • Download Node.js from https://nodejs.org/en/download/

27. NPM Installation • Download Node.js from https://nodejs.org/en/download/ • Run the downloaded Node.js installer and accept the default settings

28. NPM Installation • Download Node.js from https://nodejs.org/en/download/ • Run the downloaded Node.js installer and accept the default settings • Verify if Node.js is properly installed using command prompt: node --version

29. NPM Installation • Download Node.js from https://nodejs.org/en/download/ • Run the downloaded Node.js installer and accept the default settings • Verify if Node.js is properly installed using command prompt: node --version • NPM gets installed alongside, verify if it is properly installed using command prompt: npm --version

30. Package.json File

31. Package.json File • The package.jsonfile is the heart of a Node.js system

32. Package.json File • The package.jsonfile is the heart of a Node.js system • This file holds the metadata about a particular project

33. Package.json File • The package.jsonfile is the heart of a Node.js system • This file holds the metadata about a particular project • package.json is present in the root directory of any Node application or module

34. Package.json File • The package.jsonfile is the heart of a Node.js system • package.json holds the metadata about a particular project • package.json is present in the root directory of any Node application or module • package.json provides the Node package manager with the necessary information to understand how the project should be handled along with its dependencies.

35. Package.json File { "name": "node-npm", "version": "1.0.0", "description": "A demo application", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1"   }, "author": "Taha", "license": "ISC" } • package.json file after creating a Node.js project using the command: npminit package.json

36. Package.json File { "name": "node-npm", "version": "1.0.0", "description": "A demo application", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1"   }, "author": "Taha", "license": "ISC" } • package.json file after creating a Node.js project using the command: npminit • You can edit these parameters at the time of creation of a Node.js project package.json

37. Package.json File Name of your project { "name": "node-npm", "version": "1.0.0", "description": "A demo application", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1"   }, "author": "Taha", "license": "ISC" } • package.json file after creating a Node.js project using the command: npminit • You can edit these parameters at the time of creation of a Node.js project package.json

38. Package.json File Version of your project { "name": "node-npm", "version": "1.0.0", "description": "A demo application", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1"   }, "author": "Taha", "license": "ISC" } • This is how a package.json file looks like immediately after creating a Node.js project using the command: npminit • You can edit these parameters at the time of creation of a Node.js project package.json

39. Package.json File { "name": "node-npm", "version": "1.0.0", "description": "A demo application", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1"   }, "author": "Taha", "license": "ISC" } Description of your project • package.json file after creating a Node.js project using the command: npminit • You can edit these parameters at the time of creation of a Node.js project package.json

40. Package.json File { "name": "node-npm", "version": "1.0.0", "description": "A demo application", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1"   }, "author": "Taha", "license": "ISC" } • This is how a package.json file looks like immediately after creating a Node.js project using the command: npminit • You can edit these parameters at the time of creation of a Node.js project Main JavaScript file of your project package.json

41. Package.json File { "name": "node-npm", "version": "1.0.0", "description": "A demo application", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1"   }, "author": "Taha", "license": "ISC" } • package.json file after creating a Node.js project using the command: npminit • You can edit these parameters at the time of creation of a Node.js project Author of your project package.json

42. Package.json File { "name": "node-npm", "version": "1.0.0", "description": "A demo application", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1"   }, "author": "Taha", "license": "ISC" } • package.json file after creating a Node.js project using the command: npminit • You can edit these parameters at the time of creation of a Node.js project License of your project package.json

43. DEMO

44. DEMO DEMO