NAME

       npm-dedupe - Reduce duplication

   Synopsis
         npm dedupe
         npm ddp

         aliases: find-dupes, ddp

   Description
       Searches  the  local  package  tree and attempts to simplify the overall structure by moving dependencies
       further up the tree, where they can be more effectively shared by multiple dependent packages.

       For example, consider this dependency graph:

         a
         +-- b <-- depends on c@1.0.x
         |   `-- c@1.0.3
         `-- d <-- depends on c@~1.0.9
             `-- c@1.0.10

       In this case, npm dedupe will transform the tree to:

         a
         +-- b
         +-- d
         `-- c@1.0.10

       Because of the hierarchical nature of node's module lookup, b and d will both get their dependency met by
       the single c package at the root level of the tree.

       The deduplication algorithm walks the tree, moving each dependency as far up in  the  tree  as  possible,
       even if duplicates are not found. This will result in both a flat and deduplicated tree.

       If  a suitable version exists at the target location in the tree already, then it will be left untouched,
       but the other duplicates will be deleted.

       Arguments are ignored. Dedupe always acts on the entire tree.

       Modules

       Note that this operation transforms the dependency tree, but will  never  result  in  new  modules  being
       installed.

   See Also
       • npm help ls

       • npm help update

       • npm help install

                                                   April 2020                                      NPM-DEDUPE(1)