npm vs npx: Choosing the Right Tool for the Job.

In Node.js development, two essential tools often come into the spotlight: npm and npx. While these tools serve different purposes, many developers confuse them. Let’s explore the differences between npm and npx, and understand when to use which tool.

npm (Node Package Manager)

npm is primarily the package manager for Node.js. It is used to install, manage, and share packages or libraries.

Key Functions of npm:

1. Installing Packages:

npm install package-name

This installs the package and stores it in your node_modules folder.

2. Updating Packages:

npm update package-name

3. Dependency Management:
It uses the package.json file to track all your project’s dependencies.

4. Global Package Installation:
Some tools need to be installed globally:

npm install -g package-name

Limitations of npm:

If you install CLI tools globally, they can take up space on your system, and managing updates can sometimes be cumbersome.

npx (Node Package Executor)

npx is a command included with npm starting from version 5.2.0. It is primarily used to execute CLI tools or scripts without needing to install them globally.

Advantages of npx:

1. Run Packages Without Installation:

For example, you can use create-react-app without installing it globally:

npx create-react-app my-app

2. Single-Time Use:
If you want to use a tool only once, you don’t need to install it globally. npx lets you run it directly.

3. Always the Latest Version:
npx fetches and runs the latest version of a package, so you don’t have to worry about updates.

4. Running Scripts:
Apart from packages, it can run scripts from your project’s node_modules folder directly:

npx some-local-script

Limitations of npx:

It requires an internet connection to fetch packages. Also, if the latest version of a tool has a bug, it might cause issues.