NAME

       npm-dedupe - Reduce duplication

SYNOPSIS

       npm dedupe [package names...]
       npm ddp [package names...]

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

       npm help 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.

       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.

       If no suitable version can be found, then a warning is printed, and nothing is done.

       If any arguments are supplied, then they are filters, and only the named packages will be touched.

       Note  that  this  operation  transforms  the  dependency tree, and may result in packages getting updated
       versions, perhaps from the npm registry.

       This feature is experimental, and may change in future versions.

SEE ALSO

       •   npm help ls

       •   npm help update

       •   npm help install

                                                  October 2013                                     NPM-DEDUPE(1)