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npm command-line interface
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<section id="content">
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<header class="title">
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<h1 id="npm-prune">npm-prune</h1>
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<span class="description">Remove extraneous packages</span>
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</header>
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<section id="table_of_contents">
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<h2 id="table-of-contents">Table of contents</h2>
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<div id="_table_of_contents"><ul><li><a href="#synopsis">Synopsis</a></li><li><a href="#description">Description</a></li><li><a href="#configuration">Configuration</a></li><ul><li><a href="#omit"><code>omit</code></a></li><li><a href="#dry-run"><code>dry-run</code></a></li><li><a href="#json"><code>json</code></a></li><li><a href="#foreground-scripts"><code>foreground-scripts</code></a></li><li><a href="#ignore-scripts"><code>ignore-scripts</code></a></li><li><a href="#workspace"><code>workspace</code></a></li><li><a href="#workspaces"><code>workspaces</code></a></li><li><a href="#include-workspace-root"><code>include-workspace-root</code></a></li><li><a href="#install-links"><code>install-links</code></a></li></ul><li><a href="#see-also">See Also</a></li></ul></div>
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</section>
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<div id="_content"><h3 id="synopsis">Synopsis</h3>
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<pre><code class="language-bash">npm prune [[<@scope>/]<pkg>...]
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</code></pre>
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<h3 id="description">Description</h3>
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<p>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.</p>
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<p>Extraneous packages are those present in the <code>node_modules</code> folder that are
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not listed as any package's dependency list.</p>
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<p>If the <code>--production</code> flag is specified or the <code>NODE_ENV</code> environment
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variable is set to <code>production</code>, this command will remove the packages
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specified in your <code>devDependencies</code>. Setting <code>--no-production</code> will negate
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<code>NODE_ENV</code> being set to <code>production</code>.</p>
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<p>If the <code>--dry-run</code> flag is used then no changes will actually be made.</p>
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<p>If the <code>--json</code> flag is used, then the changes <code>npm prune</code> made (or would
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have made with <code>--dry-run</code>) are printed as a JSON object.</p>
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<p>In normal operation, extraneous modules are pruned automatically, so you'll
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only need this command with the <code>--production</code> 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.</p>
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<h3 id="configuration">Configuration</h3>
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<h4 id="omit"><code>omit</code></h4>
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<ul>
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<li>Default: 'dev' if the <code>NODE_ENV</code> environment variable is set to
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'production', otherwise empty.</li>
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<li>Type: "dev", "optional", or "peer" (can be set multiple times)</li>
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</ul>
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<p>Dependency types to omit from the installation tree on disk.</p>
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<p>Note that these dependencies <em>are</em> still resolved and added to the
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<code>package-lock.json</code> or <code>npm-shrinkwrap.json</code> file. They are just not
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physically installed on disk.</p>
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<p>If a package type appears in both the <code>--include</code> and <code>--omit</code> lists, then
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it will be included.</p>
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<p>If the resulting omit list includes <code>'dev'</code>, then the <code>NODE_ENV</code> environment
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variable will be set to <code>'production'</code> for all lifecycle scripts.</p>
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<h4 id="dry-run"><code>dry-run</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>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, <code>install</code>, <code>update</code>,
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<code>dedupe</code>, <code>uninstall</code>, as well as <code>pack</code> and <code>publish</code>.</p>
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<p>Note: This is NOT honored by other network related commands, eg <code>dist-tags</code>,
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<code>owner</code>, etc.</p>
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<h4 id="json"><code>json</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>Whether or not to output JSON data, rather than the normal output.</p>
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<ul>
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<li>In <code>npm pkg set</code> it enables parsing set values with JSON.parse() before
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saving them to your <code>package.json</code>.</li>
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</ul>
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<p>Not supported by all npm commands.</p>
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<h4 id="foreground-scripts"><code>foreground-scripts</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>Run all build scripts (ie, <code>preinstall</code>, <code>install</code>, and <code>postinstall</code>)
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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.</p>
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<p>Note that this will generally make installs run slower, and be much noisier,
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but can be useful for debugging.</p>
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<h4 id="ignore-scripts"><code>ignore-scripts</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>If true, npm does not run scripts specified in package.json files.</p>
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<p>Note that commands explicitly intended to run a particular script, such as
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<code>npm start</code>, <code>npm stop</code>, <code>npm restart</code>, <code>npm test</code>, and <code>npm run-script</code>
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will still run their intended script if <code>ignore-scripts</code> is set, but they
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will <em>not</em> run any pre- or post-scripts.</p>
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<h4 id="workspace"><code>workspace</code></h4>
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<ul>
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<li>Default:</li>
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<li>Type: String (can be set multiple times)</li>
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</ul>
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<p>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.</p>
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<p>Valid values for the <code>workspace</code> config are either:</p>
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<ul>
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<li>Workspace names</li>
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<li>Path to a workspace directory</li>
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<li>Path to a parent workspace directory (will result in selecting all
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workspaces within that folder)</li>
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</ul>
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<p>When set for the <code>npm init</code> 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.</p>
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<p>This value is not exported to the environment for child processes.</p>
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<h4 id="workspaces"><code>workspaces</code></h4>
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<ul>
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<li>Default: null</li>
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<li>Type: null or Boolean</li>
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</ul>
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<p>Set to true to run the command in the context of <strong>all</strong> configured
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workspaces.</p>
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<p>Explicitly setting this to false will cause commands like <code>install</code> to
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ignore workspaces altogether. When not set explicitly:</p>
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<ul>
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<li>Commands that operate on the <code>node_modules</code> tree (install, update, etc.)
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will link workspaces into the <code>node_modules</code> folder. - Commands that do
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other things (test, exec, publish, etc.) will operate on the root project,
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<em>unless</em> one or more workspaces are specified in the <code>workspace</code> config.</li>
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</ul>
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<p>This value is not exported to the environment for child processes.</p>
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<h4 id="include-workspace-root"><code>include-workspace-root</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>Include the workspace root when workspaces are enabled for a command.</p>
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<p>When false, specifying individual workspaces via the <code>workspace</code> config, or
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all workspaces via the <code>workspaces</code> flag, will cause npm to operate only on
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the specified workspaces, and not on the root project.</p>
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<p>This value is not exported to the environment for child processes.</p>
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<h4 id="install-links"><code>install-links</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>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.</p>
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<h3 id="see-also">See Also</h3>
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<ul>
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<li><a href="../commands/npm-uninstall.html">npm uninstall</a></li>
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<li><a href="../configuring-npm/folders.html">npm folders</a></li>
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<li><a href="../commands/npm-ls.html">npm ls</a></li>
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</ul></div>
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