Just Learn Code

Navigating npm: Global vs Local Installations and Checking Installed Packages

In the world of web development, npm has become an essential tool for installing packages and managing dependencies. Whether you are working on a personal project or a team project, npm helps simplify the package installation process, so you can focus on building your application.

In this article, we will dive into the world of npm, discussing global vs local installations and how to check your installed packages using the npm list command. Installing packages with npm:

When it comes to installing packages with npm, there are two different methods to consider: global and local installations.

A global installation will install the package to your system, allowing you to use it in any project. On the other hand, a local installation will install the package to a specific project directory, making it available only to that project.

To perform a global installation of a package, simply add the “–global” or “-g” flag to your npm install command. For example, if you want to install the nodemon package globally, you would run the following command in your terminal:

“`

npm install –global nodemon

“`

It is important to note that global installations can have negative consequences, especially when installing older versions of a package. Once a global installation has been made, it is very difficult to change or remove the package from your system entirely.

Therefore, it is generally recommended to avoid installing packages globally unless absolutely necessary. To perform a local installation of a package, simply navigate to the desired project directory in your terminal and run the “npm install” command followed by the package name.

For example, if you want to install the express package locally to your project, you would run the following command:

“`

npm install express

“`

This will install the express package to your project directory in a new folder called “node_modules”.

Checking installed packages:

Now that you have installed some packages, you may want to check what packages are currently installed on your system and in your project directory.

This can be achieved using the npm list command, which will display a list of all the installed packages on your system. When you run the “npm list” command, the output can be quite intimidating, as it lists all the packages installed as well as their respective dependencies.

However, you can filter the output to only show the top-level dependencies using the “–depth=0” option. For example, running the following command in your terminal:

“`

npm list –depth=0

“`

Will output a list of only the top-level packages installed on your system.

Conclusion:

In conclusion, npm is a powerful tool for managing packages and dependencies in web development. When installing packages, it is important to consider whether a global or local installation is the most appropriate for your needs.

Additionally, checking your installed packages using the npm list command can be beneficial when troubleshooting your project. By utilizing the information presented in this article, you can confidently navigate the world of npm and get back to building your application.

In this article, we discussed how npm is an essential tool for managing packages and dependencies in web development. We covered two different methods of installing packages – global and local installations – and explained the potential negative consequences of global installations.

Additionally, we explained how to check installed packages using npm list and showed how to filter the output to only show the top-level dependencies. By utilizing these tips and tricks, you can make the most of npm and streamline your workflow.

Remember to be cautious when installing packages globally, check your installed packages regularly, and keep your top-level dependencies list concise. Happy coding!

Popular Posts