What is package.json and how do I use it?

What is package.json and how do I use it?

The package.json file is a crucial part of Node.js projects. It contains metadata about the project, including its dependencies, scripts, and version. You can create it using npm init.

What kind of information can I find in package.json?

In package.json, you'll find the project's name, version, description, main entry point, scripts for running tasks, and a list of dependencies.

How do I add a new package to my project?

You can add a new package by running npm install <package-name>. This will also update your package.json file automatically.

Can I specify different versions of a package?

Yes, you can specify versions using semantic versioning. For example, you can use ^1.0.0 to allow updates that do not change the leftmost non-zero digit.