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)