How to find duplicate npm packages?

Question

npm dedupe can flatten the folder structure. However, before doing this. I hope to see a list of duplicate packages so that I know whether to go or not. Is there such a feature? If not, are there any scenarios that help me achieve this?

Answer 1

Try the following:

  npm ls --parseable | xargs -L1 sh -c 'basename $1' dummy | sort | uniq -c | grep -v "^ *1 " | sort -rn 

Conveyor:

• List of packages in the allowed format
• Separate each path to the package name
• Sort package names in alphabetical order to prepare for unique name counting
• Group and count unique package names
• Hide packages that are not duplicated (count = 1)
• Sort again in decreasing number of occurrences