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Vats Mishra
Vats Mishra

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Understanding the difference between npm and npx

#backend #node #programming #typescript

Introduction

'npm' and 'npx' are two important tools in Node.js ecosystem that facilitate the management and execution of Javascript packages. While they are both related to nodejs, they serve a different purpose all together.
npm: The Node Package Manager
'npm' is the default manager for Node.js. It allows developers to install, share and manage dependencies, making it an integral part of Node.js ecosystem.

Key Features:

  1. Package Installation : 'npm' enables developers to install packages globally or locally within a project. 
npm install <package-name>      # Local Installation
npm install -g <package-name>   # Global Installation
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  1. Dependency Management: 'npm' maintains a 'package.json' file in each project, documenting the project dependencies . npm init # Initialize a new package.json
  2. Script Execution: Developers can also define a custom script in 'package.json' file, and 'npm' allows the execution of these scripts. npm run <script-name> npx: Execute Node.js package 'npx' is a tool that comes bundled with 'npm' (version > 5.2.0) and serve as an execution tool for Node.js packages. It is used for temporarily install and execute packages without the need for global installation. Key Features: Package execution: 'npx' allows the execution of binaries from locally installed packages or globally installed. It automatically installs the packages and executes them. 
npx <package-name>
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  1. Executing Commands: Besides executing packages it can also be used to run general commands. 
npx <command>
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  1. Package Version Specification: Developers can specify particular version of packages to be used for execution. 
npx -p <package-name>@<version> <command>
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Now we will explain the above jargon in simplistic manner:

NPM

'npm' is like that librarian, and it helps you find and borrow different pieces of code that are called packages. These packages are like special books that have useful information and tools inside them. When you want to use a specific package in the project, you ask 'npm' to bring it to your project.

For example: You tell the librarian ('npm') that you need a tool called 'robot-builder' for your project. Now 'npm' goes to the library, finds the robot-builder tool and brings it to your project.
npm install robot-builder
The librarian 'npm' maintains a checklist ('package.json') where it writes down all the things that you have borrowed

// package.json
{
  "dependencies": {
    "robot-builder": "1.0.0"
  }
}
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NPX

On the other hand, 'npx' is a helpful friend you can call whenever you need to use a tool or a special command just for a short time. It's like calling a friend for the certain task but you don't need to keep that friend for a long time you just call them whenever you need help.

For example: You call your friend ('npx') and ask them to use 'robot-builder' tools for painting your robot. Your friend knows how to use that tool and helps you in completion of painting task without installing the package permanently.
npx robot-builder paint-robot

Once the painting is done you don't need your friend anymore ('npx').They help you with specific tasks and now you can continue with other things.

So, in a nutshell, 'npm' is like your librarian, helping you manage and borrow packages, while 'npx' is like a knowledgeable friend you call for help with specific tasks. Both are there to make your coding life easier!
Thank You

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