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.TH "NPM-EXPLAIN" "1" "July 2024" "[email protected]" ""
.SH "NAME"
\fBnpm-explain\fR - Explain installed packages
.SS "Synopsis"
.P
.RS 2
.nf
npm explain <package-spec>

alias: why
.fi
.RE
.SS "Description"
.P
This command will print the chain of dependencies causing a given package to be installed in the current project.
.P
If one or more package specs are provided, then only packages matching one of the specifiers will have their relationships explained.
.P
The package spec can also refer to a folder within \fB./node_modules\fR
.P
For example, running \fBnpm explain glob\fR within npm's source tree will show:
.P
.RS 2
.nf
[email protected]
node_modules/glob
  glob@"^7.1.4" from the root project

[email protected] dev
node_modules/tacks/node_modules/glob
  glob@"^7.0.5" from [email protected]
  node_modules/tacks/node_modules/rimraf
    rimraf@"^2.6.2" from [email protected]
    node_modules/tacks
      dev tacks@"^1.3.0" from the root project
.fi
.RE
.P
To explain just the package residing at a specific folder, pass that as the argument to the command. This can be useful when trying to figure out exactly why a given dependency is being duplicated to satisfy conflicting version requirements within the project.
.P
.RS 2
.nf
$ npm explain node_modules/nyc/node_modules/find-up
[email protected] dev
node_modules/nyc/node_modules/find-up
  find-up@"^3.0.0" from [email protected]
  node_modules/nyc
    nyc@"^14.1.1" from [email protected]
    node_modules/tap
      dev tap@"^14.10.8" from the root project
.fi
.RE
.SS "Configuration"
.SS "\fBjson\fR"
.RS 0
.IP \(bu 4
Default: false
.IP \(bu 4
Type: Boolean
.RE 0

.P
Whether or not to output JSON data, rather than the normal output.
.RS 0
.IP \(bu 4
In \fBnpm pkg set\fR it enables parsing set values with JSON.parse() before saving them to your \fBpackage.json\fR.
.RE 0

.P
Not supported by all npm commands.
.SS "\fBworkspace\fR"
.RS 0
.IP \(bu 4
Default:
.IP \(bu 4
Type: String (can be set multiple times)
.RE 0

.P
Enable running a command in the context of the configured workspaces of the current project while filtering by running only the workspaces defined by this configuration option.
.P
Valid values for the \fBworkspace\fR config are either:
.RS 0
.IP \(bu 4
Workspace names
.IP \(bu 4
Path to a workspace directory
.IP \(bu 4
Path to a parent workspace directory (will result in selecting all workspaces within that folder)
.RE 0

.P
When set for the \fBnpm init\fR command, this may be set to the folder of a workspace which does not yet exist, to create the folder and set it up as a brand new workspace within the project.
.P
This value is not exported to the environment for child processes.
.SS "See Also"
.RS 0
.IP \(bu 4
npm help "package spec"
.IP \(bu 4
npm help config
.IP \(bu 4
npm help npmrc
.IP \(bu 4
npm help folders
.IP \(bu 4
npm help ls
.IP \(bu 4
npm help install
.IP \(bu 4
npm help link
.IP \(bu 4
npm help prune
.IP \(bu 4
npm help outdated
.IP \(bu 4
npm help update
.RE 0