Package.json - npm

json in the project: We can use the command provided by npm or yarn package manager to initialize this package.

System You can provide system-level information associated with your package, such as operating system compatibility, etc.

The package.

UPSC• If defined, the preinstall script is called by yarn before your package is installed.

RD Sharma Solutions• The npm package versioning system has strict rules.

Inside your package.