172 lines
5.2 KiB
Markdown
172 lines
5.2 KiB
Markdown
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---
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title: npm-prune
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section: 1
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description: Remove extraneous packages
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---
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### Synopsis
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```bash
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npm prune [[<@scope>/]<pkg>...]
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```
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### Description
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This command removes "extraneous" packages. If a package name is provided,
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then only packages matching one of the supplied names are removed.
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Extraneous packages are those present in the `node_modules` folder that are
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not listed as any package's dependency list.
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If the `--production` flag is specified or the `NODE_ENV` environment
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variable is set to `production`, this command will remove the packages
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specified in your `devDependencies`. Setting `--no-production` will negate
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`NODE_ENV` being set to `production`.
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If the `--dry-run` flag is used then no changes will actually be made.
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If the `--json` flag is used, then the changes `npm prune` made (or would
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have made with `--dry-run`) are printed as a JSON object.
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In normal operation, extraneous modules are pruned automatically, so you'll
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only need this command with the `--production` flag. However, in the real
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world, operation is not always "normal". When crashes or mistakes happen,
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this command can help clean up any resulting garbage.
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### Configuration
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#### `omit`
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* Default: 'dev' if the `NODE_ENV` environment variable is set to
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'production', otherwise empty.
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* Type: "dev", "optional", or "peer" (can be set multiple times)
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Dependency types to omit from the installation tree on disk.
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Note that these dependencies _are_ still resolved and added to the
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`package-lock.json` or `npm-shrinkwrap.json` file. They are just not
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physically installed on disk.
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If a package type appears in both the `--include` and `--omit` lists, then
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it will be included.
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If the resulting omit list includes `'dev'`, then the `NODE_ENV` environment
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variable will be set to `'production'` for all lifecycle scripts.
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#### `dry-run`
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* Default: false
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* Type: Boolean
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Indicates that you don't want npm to make any changes and that it should
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only report what it would have done. This can be passed into any of the
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commands that modify your local installation, eg, `install`, `update`,
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`dedupe`, `uninstall`, as well as `pack` and `publish`.
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Note: This is NOT honored by other network related commands, eg `dist-tags`,
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`owner`, etc.
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#### `json`
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* Default: false
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* Type: Boolean
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Whether or not to output JSON data, rather than the normal output.
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* In `npm pkg set` it enables parsing set values with JSON.parse() before
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saving them to your `package.json`.
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Not supported by all npm commands.
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#### `foreground-scripts`
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* Default: false
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* Type: Boolean
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Run all build scripts (ie, `preinstall`, `install`, and `postinstall`)
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scripts for installed packages in the foreground process, sharing standard
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input, output, and error with the main npm process.
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Note that this will generally make installs run slower, and be much noisier,
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but can be useful for debugging.
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#### `ignore-scripts`
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* Default: false
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* Type: Boolean
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If true, npm does not run scripts specified in package.json files.
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Note that commands explicitly intended to run a particular script, such as
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`npm start`, `npm stop`, `npm restart`, `npm test`, and `npm run-script`
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will still run their intended script if `ignore-scripts` is set, but they
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will *not* run any pre- or post-scripts.
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#### `workspace`
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* Default:
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* Type: String (can be set multiple times)
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Enable running a command in the context of the configured workspaces of the
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current project while filtering by running only the workspaces defined by
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this configuration option.
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Valid values for the `workspace` config are either:
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* Workspace names
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* Path to a workspace directory
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* Path to a parent workspace directory (will result in selecting all
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workspaces within that folder)
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When set for the `npm init` command, this may be set to the folder of a
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workspace which does not yet exist, to create the folder and set it up as a
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brand new workspace within the project.
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This value is not exported to the environment for child processes.
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#### `workspaces`
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* Default: null
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* Type: null or Boolean
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Set to true to run the command in the context of **all** configured
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workspaces.
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Explicitly setting this to false will cause commands like `install` to
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ignore workspaces altogether. When not set explicitly:
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- Commands that operate on the `node_modules` tree (install, update, etc.)
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will link workspaces into the `node_modules` folder. - Commands that do
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other things (test, exec, publish, etc.) will operate on the root project,
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_unless_ one or more workspaces are specified in the `workspace` config.
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This value is not exported to the environment for child processes.
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#### `include-workspace-root`
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* Default: false
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* Type: Boolean
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Include the workspace root when workspaces are enabled for a command.
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When false, specifying individual workspaces via the `workspace` config, or
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all workspaces via the `workspaces` flag, will cause npm to operate only on
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the specified workspaces, and not on the root project.
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This value is not exported to the environment for child processes.
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#### `install-links`
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* Default: false
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* Type: Boolean
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When set file: protocol dependencies will be packed and installed as regular
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dependencies instead of creating a symlink. This option has no effect on
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workspaces.
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### See Also
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* [npm uninstall](/commands/npm-uninstall)
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* [npm folders](/configuring-npm/folders)
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* [npm ls](/commands/npm-ls)
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