Using $npm_package_ notation to retrieve information about the version of a private package

When using Npm, you can easily access package information from the package.json file by using a helpful prefix. For example, you can extract the react version with $npm_package_dependencies_react to find the current version of react listed in the file.

However, accessing information for packages listed with an @ prefix, like @types/react, can be a bit trickier. I've tried escaping special characters with no success. Does anyone have any suggestions on how to access this information using the same method?

javascriptnpm

Answer №1

To represent the symbols @ and / in code, use two underscores __ for @ and one underscore _ for /.

For example, for @types/react use the notation:

$npm_package_dependencies__types_react

Important Points:

  • If you change directory to your project folder and then execute the command below, it will display all available environment variables:

    npm run env

  • When using Windows, npm defaults to cmd.exe as the shell. In this case, access environment variables using the %...% syntax instead of the dollar sign $. For instance:

    %npm_package_dependencies__types_react%

  • Consider using cross-var for cross-platform compatibility.

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