Remove extraneous packages.
npm prune [[<@scope>/]<pkg>...] [--production]
This command removes "extraneous" packages. If a package name is provided, then only packages matching one of the supplied names are removed.
Extraneous packages are packages that are not listed on the parent package's dependencies list.
--production flag is specified or the
NODE_ENV environment variable is set to
production, this command will remove the packages specified in your
--production=false will negate
NODE_ENV being set to
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