How to determine js package version by file?

Question

JavaScript

Good afternoon.
The following problem arose, there is a file compiled through grunt js with a N number of packages, for some there are banners with the version, for some not. How is it possible to determine what packages are there, and what their versions are (well, except for manually parsing the compressed js code, and comparing the differences with all versions of this package)?
PS There is only build result, package.json, bower.json are empty

Answer 1

console.log(require('package-name/package.json').version);