How to use open source nodejs project's build or bundle in another nodejs project by importing?

I have tried to make a package of an open-source nodejs project using the following command.

npm pack
or
npm pack

After I got the tar file, I installed it by

npm install tar_file_path

After I used required api in another Nodejs project, it could not load or import properly. I am not able to launch or update the index.html file of the packaged folder.

Please guide me or help me fix this problem.

Thanks